{"id":1051,"date":"2011-06-27T23:46:34","date_gmt":"2011-06-27T21:46:34","guid":{"rendered":"http:\/\/raftaman.net\/?p=1051"},"modified":"2021-05-15T11:46:39","modified_gmt":"2021-05-15T09:46:39","slug":"auto-incremented-fields-in-apaches-derby","status":"publish","type":"post","link":"https:\/\/possiblelossofprecision.net\/?p=1051","title":{"rendered":"Auto-incremented fields in apache&#8217;s derby"},"content":{"rendered":"<p>Unlike MySQL and other SQL dialects, <a href=\"http:\/\/db.apache.org\/derby\/\">apache derby<\/a> doesn&#8217;t support the <code>AUTO_INCREMENT<\/code> keyword. To create an auto incremented filed in derby, you can use<\/p>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nCREATE TABLE customer\r\n(\r\nid INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1),\r\nname VARCHAR(40) NOT NULL,\r\naddress VARCHAR(1024),\r\ncity VARCHAR(30),\r\nCONSTRAINT primary_key PRIMARY KEY (id)\r\n) ;\r\n<\/pre>\n<p>The value of id is now incremented automagically on every insert. You don&#8217;t have to specify it manually in the insert command<\/p>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nINSERT INTO customer(name , address, city)\r\n   VALUES('Mr. Peanutbutter', '221 W 31st St', New York City);\r\n<\/pre>\n<p>For instruction on <a href=\"http:\/\/en.wikibooks.org\/wiki\/SQL_Dialects_Reference\/Data_structure_definition\/Auto-increment_column\">how to create auto incremented fields<\/a> in other SQL dialects, have a look at the <a href=\"http:\/\/en.wikibooks.org\/wiki\/SQL_Dialects_Reference\">SQL Dialects Reference<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Unlike MySQL and other SQL dialects, apache derby doesn&#8217;t support the AUTO_INCREMENT keyword. To create an auto incremented filed in derby, you can use CREATE TABLE customer ( id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1), name VARCHAR(40) NOT NULL, address VARCHAR(1024), city VARCHAR(30), CONSTRAINT primary_key PRIMARY KEY (id) ) ; The value of&#8230; <a href=\"https:\/\/possiblelossofprecision.net\/?p=1051\">Read more &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[22,41],"class_list":["post-1051","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-mysql","tag-sql"],"_links":{"self":[{"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=\/wp\/v2\/posts\/1051","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1051"}],"version-history":[{"count":5,"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=\/wp\/v2\/posts\/1051\/revisions"}],"predecessor-version":[{"id":2674,"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=\/wp\/v2\/posts\/1051\/revisions\/2674"}],"wp:attachment":[{"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/possiblelossofprecision.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}