{"id":182903,"date":"2023-08-08T03:54:22","date_gmt":"2023-08-08T02:54:22","guid":{"rendered":"https:\/\/datascientest.com\/de\/?p=182903"},"modified":"2023-10-30T14:37:58","modified_gmt":"2023-10-30T13:37:58","slug":"sql-where-befehl-ein-umfassender-leitfaden","status":"publish","type":"post","link":"https:\/\/datascientest.com\/de\/sql-where-befehl-ein-umfassender-leitfaden","title":{"rendered":"SQL WHERE Befehl: Ein umfassender Leitfaden"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"182903\" class=\"elementor elementor-182903\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3f3c886 e-flex e-con-boxed e-con\" data-id=\"3f3c886\" 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-822d0b5 elementor-widget elementor-widget-heading\" data-id=\"822d0b5\" 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><h3 class=\"elementor-heading-title elementor-size-default\">Der SQL WHERE Befehl wird in Abfragen verwendet, um Daten herauszufiltern, die eine bestimmte Bedingung erf\u00fcllen. Dadurch k\u00f6nnen nur die gew\u00fcnschten Zeilen aus einer Tabelle in einer Datenbank abgerufen werden. Mit diesem Befehl ist es m\u00f6glich, eine Teilmenge der Daten nach bestimmten Kriterien auszuw\u00e4hlen. Erfahre mehr \u00fcber die Syntax des WHERE-Befehls in <a href=\"https:\/\/datascientest.com\/formation-sql\">SQL<\/a>, seine Anwendungsf\u00e4lle und seine Vergleichsoperatoren, um deine Abfragen effizienter durchzuf\u00fchren.<\/h3>\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-abd27ad e-flex e-con-boxed e-con\" data-id=\"abd27ad\" 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-2ab26cd elementor-widget elementor-widget-heading\" data-id=\"2ab26cd\" 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\">Die Syntax des SQL WHERE-Befehls <\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a51f6e elementor-widget elementor-widget-text-editor\" data-id=\"6a51f6e\" 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>Der WHERE-Befehl besteht aus einem SELECT-Befehl und der WHERE-Bedingung.<\/p><p>Die h\u00e4ufigste Syntax lautet wie folgt:<\/p><ul><li>SELECT spaltenname1, spaltenname2 FROM tabellenname WHERE eine_Bedingung.<\/li><li>Lass uns diese SQL-Abfrage aufschl\u00fcsseln:<\/li><li>SELECT wird die Spalten mit den Namen spaltenname1 und spaltenname2 ausw\u00e4hlen.<\/li><li>FROM w\u00e4hlt die Tabelle mit dem Namen tabellenname aus.<\/li><li>WHERE f\u00fcgt eine Bedingung hinzu: W\u00e4hle nur das aus, was der Bedingung eine_Bedingung entspricht.<\/li><\/ul><p>\u00a0<\/p><p>\ud83d\udca1Auch interessant:<\/p><table dir=\"ltr\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\"><colgroup> <col width=\"426\" \/><\/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><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><\/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-c12157f e-flex e-con-boxed e-con\" data-id=\"c12157f\" 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-237f07a elementor-widget elementor-widget-heading\" data-id=\"237f07a\" 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\">Einige Beispiele f\u00fcr die Verwendung des WHERE-Befehls<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e08607 elementor-widget elementor-widget-text-editor\" data-id=\"1e08607\" 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>Um die Verwendung des WHERE-Befehls konkreter zu machen und seine Funktionsweise besser zu verstehen, wenden wir ihn auf einen bestimmten Fall an. In diesem Beispiel verwenden wir eine Kundentabelle. Sie simuliert eine Tabelle, die die Kunden einer Firma und die Anzahl ihrer Bestellungen enth\u00e4lt.<\/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-ac1d1d5 elementor-widget__width-initial elementor-widget elementor-widget-html\" data-id=\"ac1d1d5\" 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\">\n.tg  {border-collapse:collapse;border-spacing:0;}\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg .tg-9fd4{background-color:#9b9b9b;font-weight:bold;text-align:left;vertical-align:top}\n.tg .tg-0lax{text-align:left;vertical-align:top}\n<\/style>\n<table class=\"tg\">\n<thead>\n  <tr>\n    <th class=\"tg-9fd4\">ID<\/th>\n    <th class=\"tg-9fd4\">Vorname<\/th>\n    <th class=\"tg-9fd4\">Nachname<\/th>\n    <th class=\"tg-9fd4\">E-Mail<\/th>\n    <th class=\"tg-9fd4\">Bestellnummer<\/th>\n    <th class=\"tg-9fd4\">Stadt<\/th>\n  <\/tr>\n<\/thead>\n<tbody>\n  <tr>\n    <td class=\"tg-9fd4\">1<\/td>\n    <td class=\"tg-0lax\">Marie<\/td>\n    <td class=\"tg-0lax\">Nevier<\/td>\n    <td class=\"tg-0lax\">mnevier@beispiel.com<\/td>\n    <td class=\"tg-0lax\">7<\/td>\n    <td class=\"tg-0lax\">Paris<\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-9fd4\">2<\/td>\n    <td class=\"tg-0lax\">Ga\u00ebtan<\/td>\n    <td class=\"tg-0lax\">Doucle<\/td>\n    <td class=\"tg-0lax\">gdoucle@beispiel.com<\/td>\n    <td class=\"tg-0lax\">4<\/td>\n    <td class=\"tg-0lax\">Nantes<\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-9fd4\">3<\/td>\n    <td class=\"tg-0lax\">Louis<\/td>\n    <td class=\"tg-0lax\">Chenard<\/td>\n    <td class=\"tg-0lax\">lchenard@beispiel.com<\/td>\n    <td class=\"tg-0lax\">1<\/td>\n    <td class=\"tg-0lax\">Lyon<\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-9fd4\">4<\/td>\n    <td class=\"tg-0lax\">Olivia<\/td>\n    <td class=\"tg-0lax\">Caffin<\/td>\n    <td class=\"tg-0lax\">ocaffin@beispiel.com<\/td>\n    <td class=\"tg-0lax\">9<\/td>\n    <td class=\"tg-0lax\">Bordeaux<\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-9fd4\">5<\/td>\n    <td class=\"tg-0lax\">Camille<\/td>\n    <td class=\"tg-0lax\">Loutran<\/td>\n    <td class=\"tg-0lax\">cloutran@beispiel.com<\/td>\n    <td class=\"tg-0lax\">3<\/td>\n    <td class=\"tg-0lax\">Paris<\/td>\n  <\/tr>\n<\/tbody>\n<\/table>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce132f5 elementor-widget elementor-widget-heading\" data-id=\"ce132f5\" 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\">Beispiel f\u00fcr die Auswahl nach St\u00e4dten<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d9586e elementor-widget elementor-widget-text-editor\" data-id=\"8d9586e\" 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 die Syntax des <strong>WHERE-Befehls<\/strong> \u00fcbernimmst und die richtigen Elemente hinzuf\u00fcgst, kannst du diese Tabelle nach Belieben filtern. Um zum Beispiel nur die Kunden der Stadt Paris auszuw\u00e4hlen, f\u00fchren wir die <strong>folgende Abfrage durch:<\/strong><\/p><p>SELECT * FROM clients WHERE ville = &#8218;Paris&#8216;.<\/p><p>Diese Abfrage gibt dann die folgende Auswahl zur\u00fcck:<\/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-111cb21 elementor-widget__width-initial elementor-widget elementor-widget-html\" data-id=\"111cb21\" 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-pu0z{background-color:#9b9b9b;border-color:inherit;font-weight:bold;text-align:left;vertical-align:top}\r\n.tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top}\r\n<\/style>\r\n<table class=\"tg\">\r\n<thead>\r\n  <tr>\r\n    <th class=\"tg-pu0z\">id<\/th>\r\n    <th class=\"tg-pu0z\">Pr\u00e9nom<\/th>\r\n    <th class=\"tg-pu0z\">Nom<\/th>\r\n    <th class=\"tg-pu0z\">e-mail<\/th>\r\n    <th class=\"tg-pu0z\">nbr_commandes<\/th>\r\n    <th class=\"tg-pu0z\">Ville<\/th>\r\n  <\/tr>\r\n<\/thead>\r\n<tbody>\r\n  <tr>\r\n    <td class=\"tg-pu0z\">1<\/td>\r\n    <td class=\"tg-0pky\">Marie<\/td>\r\n    <td class=\"tg-0pky\">Nevier<\/td>\r\n    <td class=\"tg-0pky\">mnevier@exemple.com<\/td>\r\n    <td class=\"tg-0pky\">7<\/td>\r\n    <td class=\"tg-0pky\">Paris<\/td>\r\n  <\/tr>\r\n  <tr>\r\n    <td class=\"tg-pu0z\">2<\/td>\r\n    <td class=\"tg-0pky\">Camille<\/td>\r\n    <td class=\"tg-0pky\">Loutran<\/td>\r\n    <td class=\"tg-0pky\">cloutran@exemple.com<\/td>\r\n    <td class=\"tg-0pky\">3<\/td>\r\n    <td class=\"tg-0pky\">Paris<\/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-10f8a64 elementor-widget elementor-widget-text-editor\" data-id=\"10f8a64\" 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><span style=\"font-weight: 400;\">Beachte, dass bei den in den Bedingungen angegebenen Werten die Gro\u00df- und Kleinschreibung beachtet wird. Das bedeutet, dass du die Gro\u00df- und Kleinschreibung beachten musst, um richtig zu filtern. Im obigen Beispiel ist es notwendig, den Wert &#8222;Paris&#8220; und nicht &#8222;paris&#8220; zu verwenden.<\/span><\/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-1847884 elementor-align-center button-principale elementor-widget elementor-widget-button\" data-id=\"1847884\" 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\">Lerne mehr \u00fcber SQL<\/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-25f0d7c elementor-widget elementor-widget-heading\" data-id=\"25f0d7c\" 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\">Beispiel f\u00fcr die Auswahl nach Anzahl der Bestellungen<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-314bde0 elementor-widget elementor-widget-text-editor\" data-id=\"314bde0\" 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>F\u00fcr ein physisches oder <a href=\"https:\/\/datascientest.com\/de\/die-verwendung-von-data-science-im-e-commerce\">Online-Gesch\u00e4ft<\/a> kann es interessant sein, Kunden nach der Anzahl ihrer Bestellungen zu filtern. Wenn wir die urspr\u00fcngliche Tabelle wieder heranziehen, f\u00fchre folgende Abfrage durch:<\/p><p>SELECT * FROM customers WHERE nbr_orders &gt;= 4.<\/p><p>Diese Abfrage gibt dann alle Kunden zur\u00fcck, die 4 oder mehr Bestellungen get\u00e4tigt haben:<\/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-ec85a2b elementor-widget__width-initial elementor-widget elementor-widget-html\" data-id=\"ec85a2b\" 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\">\n.tg  {border-collapse:collapse;border-spacing:0;}\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg .tg-pu0z{background-color:#9b9b9b;border-color:inherit;font-weight:bold;text-align:left;vertical-align:top}\n.tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top}\n<\/style>\n<table class=\"tg\">\n<thead>\n  <tr>\n    <th class=\"tg-pu0z\">ID<\/th>\n    <th class=\"tg-pu0z\">Vorname<\/th>\n    <th class=\"tg-pu0z\">Nachname<\/th>\n    <th class=\"tg-pu0z\">E-Mail<\/th>\n    <th class=\"tg-pu0z\">Anzahl Bestellungen<\/th>\n    <th class=\"tg-pu0z\">Stadt<\/th>\n  <\/tr>\n<\/thead>\n<tbody>\n  <tr>\n    <td class=\"tg-pu0z\">1<\/td>\n    <td class=\"tg-0pky\">Marie<\/td>\n    <td class=\"tg-0pky\">Nevier<\/td>\n    <td class=\"tg-0pky\">mnevier@beispiel.com<\/td>\n    <td class=\"tg-0pky\">7<\/td>\n    <td class=\"tg-0pky\">Paris<\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-pu0z\">2<\/td>\n    <td class=\"tg-0pky\">Camille<\/td>\n    <td class=\"tg-0pky\">Loutran<\/td>\n    <td class=\"tg-0pky\">cloutran@beispiel.com<\/td>\n    <td class=\"tg-0pky\">3<\/td>\n    <td class=\"tg-0pky\">Paris<\/td>\n  <\/tr>\n<\/tbody>\n<\/table>\n\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-9408958 e-flex e-con-boxed e-con\" data-id=\"9408958\" 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-78514ec elementor-widget elementor-widget-heading\" data-id=\"78514ec\" 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\">Die Vergleichsoperatoren des SQL WHERE Befehls<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a41ee03 elementor-widget elementor-widget-text-editor\" data-id=\"a41ee03\" 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>In unseren beiden Beispielen haben wir die Operatoren = und &gt;= verwendet, um die Ergebnisse in der SQL-Abfrage zu filtern. Dies sind jedoch nicht die einzigen Operatoren, die mit dem WHERE-Befehl verwendet werden k\u00f6nnen. In der folgenden Tabelle findest du eine Liste der am h\u00e4ufigsten verwendeten Operatoren:<\/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-155abb9 elementor-widget__width-initial elementor-widget elementor-widget-html\" data-id=\"155abb9\" 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\">\n.tg  {border-collapse:collapse;border-spacing:0;}\n.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;\n  font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;}\n.tg .tg-52qd{background-color:#6665cd;font-size:18px;font-weight:bold;text-align:left;vertical-align:top}\n.tg .tg-0lax{text-align:left;vertical-align:top}\n<\/style>\n<table class=\"tg\">\n<thead>\n  <tr>\n    <th class=\"tg-52qd\">Operator<\/th>\n    <th class=\"tg-52qd\">Operatorbeschreibung<\/th>\n  <\/tr>\n<\/thead>\n<tbody>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">=<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Gleich<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">&lt;&gt; oder !=<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Ungleich (nicht gleich)<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">&lt;<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Strikt kleiner als<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">&gt;<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Strikt gr\u00f6\u00dfer als<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">&lt;=<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Kleiner gleich<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">&gt;=<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Gr\u00f6\u00dfer gleich<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">IN<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Liste m\u00f6glicher Werte<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">BETWEEN<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Werte innerhalb eines Intervalls (Wertebereich oder Datumsspanne)<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">LIKE<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Enth\u00e4lt Anfang, Mitte oder Ende eines Wortes<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">IS NULL<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Wert ist null<\/span><\/td>\n  <\/tr>\n  <tr>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">IS NOT NULL<\/span><\/td>\n    <td class=\"tg-0lax\"><span style=\"font-weight:400;font-style:normal;text-decoration:none;color:#000;background-color:transparent\">Wert ist nicht null<\/span><\/td>\n  <\/tr>\n<\/tbody>\n<\/table>\n\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-b4d8cab e-flex e-con-boxed e-con\" data-id=\"b4d8cab\" 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-82fc73f elementor-widget elementor-widget-heading\" data-id=\"82fc73f\" 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\">Schlussfolgerung zu SQL WHERE<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3af3527 elementor-widget elementor-widget-text-editor\" data-id=\"3af3527\" 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><span style=\"font-weight: 400;\">Kurz gesagt ist <strong>SQL WHERE<\/strong> ein Befehl, der besonders n\u00fctzlich ist, um Zeilen in einer Tabelle auszuw\u00e4hlen, die eine bestimmte Bedingung erf\u00fcllen. Mit den verschiedenen Operatoren kannst du den<strong> SQL WHERE-Befehl<\/strong> verwenden, um verschiedene Werte wie Zahlen, Daten oder W\u00f6rter zu filtern. <\/span><\/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-b35a76c elementor-align-center button-principale elementor-widget elementor-widget-button\" data-id=\"b35a76c\" 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 lernen mit DataScientest<\/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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-012b7d7 e-flex e-con-boxed e-con\" data-id=\"012b7d7\" 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-2f7212f elementor-widget elementor-widget-html\" data-id=\"2f7212f\" 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\": \"Die Syntax des WHERE-Befehls in SQL\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Der WHERE-Befehl besteht aus einem SELECT-Befehl und der WHERE-Bedingung. Die gebr\u00e4uchlichste Syntax ist:SELECT spaltenname1, spaltenname2 FROM tabellenname WHERE eine_Bedingung\".\n    }\n  },{\n    \"@type\": \"Question\",\n    \"name\": \"Die Vergleichsoperatoren des WHERE-Befehls\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"In unseren beiden Beispielen haben wir die Operatoren = und >= verwendet, um die Ergebnisse in der SQL-Abfrage zu filtern. Dies sind jedoch nicht die einzigen Operatoren, die mit dem WHERE-Befehl verwendet werden k\u00f6nnen.\"\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>Der SQL WHERE Befehl wird in Abfragen verwendet, um Daten herauszufiltern, die eine bestimmte Bedingung erf\u00fcllen. Dadurch k\u00f6nnen nur die gew\u00fcnschten Zeilen aus einer Tabelle in einer Datenbank abgerufen werden. Mit diesem Befehl ist es m\u00f6glich, eine Teilmenge der Daten nach bestimmten Kriterien auszuw\u00e4hlen. Erfahre mehr \u00fcber die Syntax des WHERE-Befehls in SQL, seine Anwendungsf\u00e4lle [&hellip;]<\/p>\n","protected":false},"author":45,"featured_media":182905,"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 WHERE Befehl: Ein umfassender Leitfaden<\/title>\n<meta name=\"description\" content=\"SQL WHERE: Der &quot;WHERE&quot;-Befehl in SQL wird verwendet, um Datens\u00e4tze in einer Datenbank abzufragen und auszuw\u00e4hlen,\" \/>\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-where-befehl-ein-umfassender-leitfaden\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL WHERE Befehl: Ein umfassender Leitfaden\" \/>\n<meta property=\"og:description\" content=\"Der SQL WHERE Befehl wird in Abfragen verwendet, um Daten herauszufiltern, die eine bestimmte Bedingung erf\u00fcllen. 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