{"id":178097,"date":"2023-06-10T19:56:44","date_gmt":"2023-06-10T18:56:44","guid":{"rendered":"https:\/\/datascientest.com\/de\/?p=178097"},"modified":"2023-10-30T11:29:03","modified_gmt":"2023-10-30T10:29:03","slug":"sql-delete-wie-wird-diese-abfrage-verwendet","status":"publish","type":"post","link":"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet","title":{"rendered":"SQL DELETE: Wie wird diese Abfrage verwendet?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"178097\" class=\"elementor elementor-178097\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f45087f e-flex e-con-boxed e-con\" data-id=\"f45087f\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dada88e elementor-widget elementor-widget-heading\" data-id=\"dada88e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Zu den unverzichtbaren Abfragen der SQL-Sprache geh\u00f6rt DELETE. Und das aus gutem Grund, denn mit diesem Befehl kannst du Datenzeilen l\u00f6schen. Aber wie benutzt man SQL DELETE? Das werden wir uns in diesem Artikel ansehen.<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d55b98d e-flex e-con-boxed e-con\" data-id=\"d55b98d\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1b5d5c8 elementor-widget elementor-widget-heading\" data-id=\"1b5d5c8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Was ist SQL DELETE ?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2849b82 elementor-widget elementor-widget-text-editor\" data-id=\"2849b82\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>Um die Qualit\u00e4t und Zuverl\u00e4ssigkeit der Daten in einer Tabelle zu gew\u00e4hrleisten, ist es oft notwendig, einen oder mehrere Daten zu l\u00f6schen (entweder weil sie falsch, veraltet, fehlerhaft, ungeeignet, &#8230; sind). Zu diesem Zweck kann die Abfrage <strong>SQL DELETE<\/strong> verwendet werden. Mit diesem Befehl kannst du alle Datens\u00e4tze l\u00f6schen, die du nicht mehr ben\u00f6tigst.<\/p><p>Gut zu wissen: Bevor du eine Datenbank oder eine Tabelle l\u00f6schst, solltest du ein Backup erstellen. Sobald die Abfrage SQL DELETE gestartet wurde, gibt es kein Zur\u00fcck mehr. Wenn du also versehentlich gel\u00f6schte Daten wiederherstellen willst, solltest du ein Backup haben.<\/p><p>\u00a0<\/p><p>\ud83d\udca1Auch interessant:<\/p><table dir=\"ltr\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\"><colgroup><col width=\"268\" \/><\/colgroup><tbody><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;MySQL Relationale Datenbanksoftware&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/mysql-eine-relationale-datenverwaltungssoftware\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/mysql-eine-relationale-datenverwaltungssoftware\" target=\"_blank\" rel=\"noopener\">MySQL Relationale Datenbanksoftware<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL Tutorial&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/sql-tutorial\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/sql-tutorial\" target=\"_blank\" rel=\"noopener\">SQL Tutorial<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Apache Cassandra noSQL BDD&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/apache-cassandra-die-beliebteste-nosql-bdd\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/apache-cassandra-die-beliebteste-nosql-bdd\" target=\"_blank\" rel=\"noopener\">Apache Cassandra noSQL BDD<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL Joins&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/alles-uber-sql-joins-verstehen\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/alles-uber-sql-joins-verstehen\" target=\"_blank\" rel=\"noopener\">SQL Joins<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL Count Tutorial&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/sql-count-unser-tutorial\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/sql-count-unser-tutorial\" target=\"_blank\" rel=\"noopener\">SQL Count Tutorial<\/a><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ca609ef e-flex e-con-boxed e-con\" data-id=\"ca609ef\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ceddf0 elementor-widget elementor-widget-heading\" data-id=\"9ceddf0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Wie kann ich SQL DELETE zum L\u00f6schen von Daten verwenden?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e09958f elementor-widget elementor-widget-text-editor\" data-id=\"e09958f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Die Syntax zum L\u00f6schen von Daten aus einer Tabelle lautet wie folgt:<\/p><p>DELETE FROM `table`.<br \/>WHERE condition<\/p><p>Und damit du die Verwendung von <strong>SQL DELETE<\/strong> besser verstehen kannst, zeigen wir dir mehrere konkrete Anwendungsf\u00e4lle. Zu diesem Zweck verwenden wir die folgende Tabelle &#8222;Client&#8220; :<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b9b0253 elementor-widget elementor-widget-html\" data-id=\"b9b0253\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style type=\"text\/css\">\r\n.tg  {border-collapse:collapse;border-spacing:0;}\r\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg .tg-8806{background-color:#6434fc;border-color:inherit;color:#efefef;text-align:center;vertical-align:top}\r\n.tg .tg-baqh{text-align:center;vertical-align:top}\r\n.tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top}\r\n.tg .tg-mw77{background-color:#6434fc;color:#efefef;text-align:center;vertical-align:top}\r\n<\/style>\r\n<table class=\"tg\" style=\"undefined;table-layout: fixed; width: 700px\">\r\n<colgroup>\r\n<col style=\"width: 25px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 100px\">\r\n<col style=\"width: 200px\">\r\n<\/colgroup>\r\n<thead>\r\n  <tr>\r\n    <th class=\"tg-8806\">ID<\/th>\r\n    <th class=\"tg-8806\">Vorname<\/th>\r\n    <th class=\"tg-8806\">Nachname<\/th>\r\n    <th class=\"tg-8806\">Stadt<\/th>\r\n    <th class=\"tg-mw77\">Alter<\/th>\r\n    <th class=\"tg-mw77\">Email<\/th>\r\n  <\/tr>\r\n<\/thead>\r\n<tbody>\r\n  <tr>\r\n    <td class=\"tg-8806\">1<\/td>\r\n    <td class=\"tg-c3ow\">Justin<\/td>\r\n    <td class=\"tg-c3ow\">Martin<\/td>\r\n    <td class=\"tg-c3ow\">Paris<\/td>\r\n    <td class=\"tg-baqh\">29<\/td>\r\n    <td class=\"tg-baqh\">justinemartin@gmail.com<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-8806\">2<\/td>\r\n    <td class=\"tg-c3ow\">Thomas <\/td>\r\n    <td class=\"tg-c3ow\">Durant<\/td>\r\n    <td class=\"tg-c3ow\">Bordeaux<\/td>\r\n    <td class=\"tg-baqh\">35<\/td>\r\n    <td class=\"tg-baqh\">tomtom@sfr.fr<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-mw77\">3<\/td>\r\n    <td class=\"tg-baqh\">Marie<\/td>\r\n    <td class=\"tg-baqh\">Leroy<\/td>\r\n    <td class=\"tg-baqh\">Angers<\/td>\r\n    <td class=\"tg-baqh\">27<\/td>\r\n    <td class=\"tg-baqh\">marieleroy@laposte.net<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-mw77\">4<\/td>\r\n    <td class=\"tg-baqh\">Vanessa<\/td>\r\n    <td class=\"tg-baqh\">Savary<\/td>\r\n    <td class=\"tg-baqh\">Marseille<\/td>\r\n    <td class=\"tg-baqh\">32<\/td>\r\n    <td class=\"tg-baqh\">vanessa13@gmail.com<\/td>\r\n  <\/tr>\r\n<\/tbody>\r\n<\/table>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-667f07e elementor-widget elementor-widget-heading\" data-id=\"667f07e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Eine einzelne Zeile l\u00f6schen<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ce7f9e elementor-widget elementor-widget-text-editor\" data-id=\"4ce7f9e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Wenn du eine einzelne Zeile l\u00f6schen m\u00f6chtest, speichere einfach die folgende Abfrage:<\/p><p>DELETE FROM `Client`.<br \/>WHERE `id` = 2<\/p><p>In diesem Rahmen haben wir die Zeile aus dem Array Client gel\u00f6scht, die der ID 2 entspricht. Hier ist das Ergebnis:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d874f76 elementor-widget elementor-widget-html\" data-id=\"d874f76\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style type=\"text\/css\">\r\n.tg  {border-collapse:collapse;border-spacing:0;}\r\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg .tg-8806{background-color:#6434fc;border-color:inherit;color:#efefef;text-align:center;vertical-align:top}\r\n.tg .tg-baqh{text-align:center;vertical-align:top}\r\n.tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top}\r\n.tg .tg-mw77{background-color:#6434fc;color:#efefef;text-align:center;vertical-align:top}\r\n<\/style>\r\n<table class=\"tg\" style=\"undefined;table-layout: fixed; width: 700px\">\r\n<colgroup>\r\n<col style=\"width: 25px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 100px\">\r\n<col style=\"width: 200px\">\r\n<\/colgroup>\r\n<thead>\r\n  <tr>\r\n    <th class=\"tg-8806\">ID<\/th>\r\n    <th class=\"tg-8806\">Vorname<\/th>\r\n    <th class=\"tg-8806\">Nachname<\/th>\r\n    <th class=\"tg-8806\">Stadt<\/th>\r\n    <th class=\"tg-mw77\">Alter<\/th>\r\n    <th class=\"tg-mw77\">Email<\/th>\r\n  <\/tr>\r\n<\/thead>\r\n<tbody>\r\n  <tr>\r\n    <td class=\"tg-8806\">1<\/td>\r\n    <td class=\"tg-c3ow\">Justin<\/td>\r\n    <td class=\"tg-c3ow\">Martin<\/td>\r\n    <td class=\"tg-c3ow\">Paris<\/td>\r\n    <td class=\"tg-baqh\">29<\/td>\r\n    <td class=\"tg-baqh\">justinemartin@gmail.com<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-mw77\">3<\/td>\r\n    <td class=\"tg-baqh\">Marie<\/td>\r\n    <td class=\"tg-baqh\">Leroy<\/td>\r\n    <td class=\"tg-baqh\">Angers<\/td>\r\n    <td class=\"tg-baqh\">27<\/td>\r\n    <td class=\"tg-baqh\">marieleroy@laposte.net<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-mw77\">4<\/td>\r\n    <td class=\"tg-baqh\">Vanessa<\/td>\r\n    <td class=\"tg-baqh\">Savary<\/td>\r\n    <td class=\"tg-baqh\">Marseille<\/td>\r\n    <td class=\"tg-baqh\">32<\/td>\r\n    <td class=\"tg-baqh\">vanessa13@gmail.com<\/td>\r\n  <\/tr>\r\n<\/tbody>\r\n<\/table>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-821dc0f elementor-align-center button-principale elementor-widget elementor-widget-button\" data-id=\"821dc0f\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/datascientest.com\/de\/unsere-aus-und-weiterbildungen\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">SQL DELETE lernen<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e60152 elementor-widget elementor-widget-heading\" data-id=\"5e60152\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Mehrere Zeilen l\u00f6schen<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2087d47 elementor-widget elementor-widget-text-editor\" data-id=\"2087d47\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Du kannst mehrere Zeilen leicht l\u00f6schen, wenn sie gemeinsame Merkmale aufweisen.<\/p><p>L\u00f6sche z. B. alle Kunden, die \u00e4lter als 30 Jahre sind.<\/p><p>Hier ist die Abfrage:<\/p><p>DELETE FROM `Client`.<br \/>WHERE ` ge` &gt; &#8217;30&#8216;.<\/p><p>Und das Ergebnis:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2779765 elementor-widget elementor-widget-html\" data-id=\"2779765\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style type=\"text\/css\">\r\n.tg  {border-collapse:collapse;border-spacing:0;}\r\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg .tg-8806{background-color:#6434fc;border-color:inherit;color:#efefef;text-align:center;vertical-align:top}\r\n.tg .tg-baqh{text-align:center;vertical-align:top}\r\n.tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top}\r\n.tg .tg-mw77{background-color:#6434fc;color:#efefef;text-align:center;vertical-align:top}\r\n<\/style>\r\n<table class=\"tg\" style=\"undefined;table-layout: fixed; width: 700px\">\r\n<colgroup>\r\n<col style=\"width: 25px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 100px\">\r\n<col style=\"width: 200px\">\r\n<\/colgroup>\r\n<thead>\r\n  <tr>\r\n    <th class=\"tg-8806\">ID<\/th>\r\n    <th class=\"tg-8806\">Vorname<\/th>\r\n    <th class=\"tg-8806\">Nachname<\/th>\r\n    <th class=\"tg-8806\">Stadt<\/th>\r\n    <th class=\"tg-mw77\">Alter<\/th>\r\n    <th class=\"tg-mw77\">Email<\/th>\r\n  <\/tr>\r\n<\/thead>\r\n<tbody>\r\n  <tr>\r\n    <td class=\"tg-8806\">1<\/td>\r\n    <td class=\"tg-c3ow\">Justin<\/td>\r\n    <td class=\"tg-c3ow\">Martin<\/td>\r\n    <td class=\"tg-c3ow\">Paris<\/td>\r\n    <td class=\"tg-baqh\">29<\/td>\r\n    <td class=\"tg-baqh\">justinemartin@gmail.com<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-mw77\">3<\/td>\r\n    <td class=\"tg-baqh\">Marie<\/td>\r\n    <td class=\"tg-baqh\">Leroy<\/td>\r\n    <td class=\"tg-baqh\">Angers<\/td>\r\n    <td class=\"tg-baqh\">27<\/td>\r\n    <td class=\"tg-baqh\">marieleroy@laposte.net<\/td>\r\n  <\/tr>\r\n<\/tbody>\r\n<\/table>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a19e84 elementor-widget elementor-widget-text-editor\" data-id=\"4a19e84\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Zur Erinnerung: Mit der WHERE-Klausel kannst du die Zeilen in der Tabelle angeben, die du l\u00f6schen m\u00f6chtest.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ed9023 elementor-widget elementor-widget-heading\" data-id=\"4ed9023\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Alle Daten l\u00f6schen<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1fd144e elementor-widget elementor-widget-text-editor\" data-id=\"1fd144e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Die Syntax lautet wie folgt:<\/p><p>DELETE FROM `Tableau`.<\/p><p>Du musst nur die<strong> WHERE-Bedingungsklausel<\/strong> entfernen, um alle Daten aus deiner Tabelle zu l\u00f6schen.<\/p><p>Gut zu wissen: Anstelle der DELETE-Abfrage kannst du auch den TRUNCATE-Befehl verwenden. Die Funktionsweise ist die gleiche, mit einem Unterschied: Wenn es ein Autoinkrement gibt, wird es durch die TRUNCATE-Abfrage zur\u00fcckgesetzt. Dies ist beim DELETE-Befehl nicht der Fall.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f66f4a4 elementor-widget elementor-widget-heading\" data-id=\"f66f4a4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Zeilen zwischen zwei Datens\u00e4tzen l\u00f6schen<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5b2f049 elementor-widget elementor-widget-text-editor\" data-id=\"5b2f049\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Es ist m\u00f6glich, die DELETE-Abfrage mit anderen SQL-Befehlen zu verwenden. In diesem Beispiel stellen wir dir auch die Abfragen BETWEEN und AND vor. Die Idee ist dann, die Zeilen zwischen zwei anderen Zeilen zu l\u00f6schen. Zum Beispiel zwischen den Zeilen 1 und 4.<\/p><p>Die Syntax lautet wie folgt:<\/p><p>DELETE FROM Client WHERE id BETWEEN 1 AND 4.<\/p><p>Hier ist das Ergebnis:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce20f57 elementor-widget elementor-widget-html\" data-id=\"ce20f57\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style type=\"text\/css\">\r\n.tg  {border-collapse:collapse;border-spacing:0;}\r\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\r\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\r\n.tg .tg-8806{background-color:#6434fc;border-color:inherit;color:#efefef;text-align:center;vertical-align:top}\r\n.tg .tg-baqh{text-align:center;vertical-align:top}\r\n.tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top}\r\n.tg .tg-mw77{background-color:#6434fc;color:#efefef;text-align:center;vertical-align:top}\r\n<\/style>\r\n<table class=\"tg\" style=\"undefined;table-layout: fixed; width: 700px\">\r\n<colgroup>\r\n<col style=\"width: 25px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 125px\">\r\n<col style=\"width: 100px\">\r\n<col style=\"width: 200px\">\r\n<\/colgroup>\r\n<thead>\r\n  <tr>\r\n    <th class=\"tg-8806\">ID<\/th>\r\n    <th class=\"tg-8806\">Vorname<\/th>\r\n    <th class=\"tg-8806\">Nachname<\/th>\r\n    <th class=\"tg-8806\">Stadt<\/th>\r\n    <th class=\"tg-mw77\">Alter<\/th>\r\n    <th class=\"tg-mw77\">Email<\/th>\r\n  <\/tr>\r\n<\/thead>\r\n<tbody>\r\n  <tr>\r\n    <td class=\"tg-8806\">1<\/td>\r\n    <td class=\"tg-c3ow\">Justin<\/td>\r\n    <td class=\"tg-c3ow\">Martin<\/td>\r\n    <td class=\"tg-c3ow\">Paris<\/td>\r\n    <td class=\"tg-baqh\">29<\/td>\r\n    <td class=\"tg-baqh\">justinemartin@gmail.com<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-mw77\">4<\/td>\r\n    <td class=\"tg-baqh\">Vanessa<\/td>\r\n    <td class=\"tg-baqh\">Savary<\/td>\r\n    <td class=\"tg-baqh\">Marseille<\/td>\r\n    <td class=\"tg-baqh\">32<\/td>\r\n    <td class=\"tg-baqh\">vanessa13@gmail.com<\/td>\r\n  <\/tr>\r\n<\/tbody>\r\n<\/table>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d1206ee elementor-widget elementor-widget-text-editor\" data-id=\"d1206ee\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Dies sind nur einige vereinfachte Beispiele. In Wirklichkeit gibt es viele verschiedene Anwendungen f\u00fcr den <strong>Befehl SQL DELETE<\/strong>. Wenn du mehr dar\u00fcber erfahren m\u00f6chtest, kannst du gerne an unserem Kurs teilnehmen.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b7b4ced e-flex e-con-boxed e-con\" data-id=\"b7b4ced\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8706672 elementor-widget elementor-widget-heading\" data-id=\"8706672\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Nimm an unseren Weiterbildungen teil, um die SQL-Sprache zu vertiefen<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6352186 elementor-widget elementor-widget-text-editor\" data-id=\"6352186\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Die<strong> Beherrschung der SQL-Sprache<\/strong> ist eine der Grundlagen f\u00fcr jeden Datenexperten oder Entwickler. Aber zwischen Aktualisierungen, L\u00f6schungen, Hinzuf\u00fcgungen&#8230; ist es notwendig, eine Vielzahl von <strong>SQL-Abfragen<\/strong> zu kennen.<br \/>Aus diesem Grund bieten wir bei DataScientest Schulungen an. Neben dem Befehl SQL DELETE lernst du alle Abfragen kennen, die f\u00fcr die Arbeit mit einer relationalen <a href=\"https:\/\/datascientest.com\/de\/sql-alles-uber-die-datenbanksprache\">Datenbank<\/a> unerl\u00e4sslich sind.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ee927a elementor-align-center button-principale elementor-widget elementor-widget-button\" data-id=\"6ee927a\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/datascientest.com\/de\/unsere-aus-und-weiterbildungen\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Entdecke unsere Weiterbildung<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2143f1 elementor-widget elementor-widget-text-editor\" data-id=\"f2143f1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>\ud83d\udca1Auch interessant:<\/p><table dir=\"ltr\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\"><colgroup><col width=\"268\" \/><\/colgroup><tbody><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL Datei \u00f6ffnen&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/sql-datei-oeffnen-unser-tutorial\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/sql-datei-oeffnen-unser-tutorial\" target=\"_blank\" rel=\"noopener\">SQL Datei \u00f6ffnen<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL vs. NOSQL&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/sql-vs-nosql-unterschiede-anwendungen-vor-und-nachteile\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/sql-vs-nosql-unterschiede-anwendungen-vor-und-nachteile\" target=\"_blank\" rel=\"noopener\">SQL vs. NOSQL<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;noSQL nicht relationale Datenbanken&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/no-sql-nicht-relationale-datenbanken\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/no-sql-nicht-relationale-datenbanken\" target=\"_blank\" rel=\"noopener\">noSQL nicht relationale Datenbanken<\/a><\/td><\/tr><tr><td data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Alles \u00fcber SQL&quot;}\" data-sheets-hyperlink=\"https:\/\/datascientest.com\/de\/sql-alles-uber-die-datenbanksprache\"><a class=\"in-cell-link\" href=\"https:\/\/datascientest.com\/de\/sql-alles-uber-die-datenbanksprache\" target=\"_blank\" rel=\"noopener\">Alles \u00fcber SQL<\/a><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba11a59 elementor-widget elementor-widget-html\" data-id=\"ba11a59\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<script type=\"application\/ld+json\">.\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [{{\n    \"@type\": \"Frage\",\n    \"name\": \"Was ist SQL DELETE?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Um die Qualit\u00e4t und Zuverl\u00e4ssigkeit der Daten in einer Tabelle zu gew\u00e4hrleisten, ist es oft notwendig, einen oder mehrere Daten zu l\u00f6schen (entweder weil sie falsch, veraltet, fehlerhaft, ungeeignet, ... sind). Zu diesem Zweck kann die SQL-Abfrage DELETE verwendet werden. Mit diesem Befehl kannst du alle Datens\u00e4tze l\u00f6schen, die du nicht mehr ben\u00f6tigst.\"\n    }\n  },{\n    \"@type\": \"Frage\",\n    \"name\": \"Zeilen zwischen zwei Datens\u00e4tzen l\u00f6schen\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Die DELETE-Abfrage kann auch mit anderen SQL-Befehlen verwendet werden. In diesem Beispiel zeigen wir dir auch die Abfragen BETWEEN und AND. Die Idee ist, die Zeilen zwischen zwei anderen Zeilen zu l\u00f6schen. Zum Beispiel zwischen den Zeilen 1 und 4\".\n    }\n  }]\n}\n<\/script>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Zu den unverzichtbaren Abfragen der SQL-Sprache geh\u00f6rt DELETE. Und das aus gutem Grund, denn mit diesem Befehl kannst du Datenzeilen l\u00f6schen. Aber wie benutzt man SQL DELETE? Das werden wir uns in diesem Artikel ansehen. Was ist SQL DELETE ? Um die Qualit\u00e4t und Zuverl\u00e4ssigkeit der Daten in einer Tabelle zu gew\u00e4hrleisten, ist es oft [&hellip;]<\/p>\n","protected":false},"author":67,"featured_media":178098,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"content-type":"","inline_featured_image":false},"categories":[2454],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v21.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SQL DELETE: Wie wird diese Abfrage verwendet?<\/title>\n<meta name=\"description\" content=\"Die SQL-Anweisung INSERT INTO wird verwendet, um Daten in eine Tabelle einer Datenbank einzuf\u00fcgen. Viele machen allerdings den Fehler und...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL DELETE: Wie wird diese Abfrage verwendet?\" \/>\n<meta property=\"og:description\" content=\"Zu den unverzichtbaren Abfragen der SQL-Sprache geh\u00f6rt DELETE. Und das aus gutem Grund, denn mit diesem Befehl kannst du Datenzeilen l\u00f6schen. Aber wie\" \/>\n<meta property=\"og:url\" content=\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet\" \/>\n<meta property=\"og:site_name\" content=\"Weiterbildung Data Science | DataScientest.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataScientestEN\" \/>\n<meta property=\"article:published_time\" content=\"2023-06-10T18:56:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-30T10:29:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/datascientest.com\/de\/wp-content\/blogs.dir\/8\/files\/2023\/06\/delete-sql-datascientest.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"512\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Melanie\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DataScientest__\" \/>\n<meta name=\"twitter:site\" content=\"@DataScientest__\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Melanie\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet#article\",\"isPartOf\":{\"@id\":\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet\"},\"author\":{\"name\":\"Melanie\",\"@id\":\"https:\/\/datascientest.com\/de\/#\/schema\/person\/19d5f7ade9407eb69af3bf6d1ae1731d\"},\"headline\":\"SQL DELETE: Wie wird diese Abfrage verwendet?\",\"datePublished\":\"2023-06-10T18:56:44+00:00\",\"dateModified\":\"2023-10-30T10:29:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet\"},\"wordCount\":678,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/datascientest.com\/de\/#organization\"},\"articleSection\":[\"Data Science\"],\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet#respond\"]}],\"copyrightYear\":\"2023\",\"copyrightHolder\":{\"@id\":\"https:\/\/datascientest.com\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet\",\"url\":\"https:\/\/datascientest.com\/de\/sql-delete-wie-wird-diese-abfrage-verwendet\",\"name\":\"SQL DELETE: Wie wird diese Abfrage verwendet?\",\"isPartOf\":{\"@id\":\"https:\/\/datascientest.com\/de\/#website\"},\"datePublished\":\"2023-06-10T18:56:44+00:00\",\"dateModified\":\"2023-10-30T10:29:03+00:00\",\"description\":\"Die SQL-Anweisung INSERT INTO wird verwendet, um Daten in eine Tabelle einer Datenbank einzuf\u00fcgen. 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