更新时间:2024-10-26 GMT+08:00
IF NOT EXISTS
DSC支持转换IF NOT EXISTS关键字,迁移过程保留。
输入示例
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DROP TABLE IF EXISTS `categories`; CREATE TABLE IF NOT EXISTS `categories` ( `CategoryID` tinyint(5) unsigned NOT NULL PRIMARY KEY AUTO_INCREMENT, `CategoryName` varchar(15) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '' , `Description` mediumtext CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL , `Picture` varchar(50) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '', UNIQUE (`CategoryID`) )ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=latin1; DROP TABLE IF EXISTS `categories`; |
输出示例
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DROP TABLE IF EXISTS "public"."categories"; CREATE TABLE IF NOT EXISTS "public"."categories" ( "categoryid" SMALLSERIAL NOT NULL PRIMARY KEY, "categoryname" VARCHAR(60) NOT NULL DEFAULT '', "description" TEXT NOT NULL, "picture" VARCHAR(200) NOT NULL DEFAULT '' ) WITH (ORIENTATION = ROW, COMPRESSION = NO) NOCOMPRESS DISTRIBUTE BY HASH ("categoryid"); DROP TABLE IF EXISTS "public"."categories"; |
父主题: 表(可选参数、操作)