CREATE TABLE dbo.[User] ( UID BIGINT IDENTITY ,Name VARCHAR(50) NOT NULL ,Pwd VARCHAR(50) NOT NULL ,CONSTRAINT PK_User PRIMARY KEY CLUSTERED (UID) ) ON [PRIMARY]
-- 方法2:使用表变量 -- 声明表变量 DECLARE @temp TABLE ( UID BIGINT, Name VARCHAR(50), Pwd VARCHAR(50) ); -- 将源表中的数据插入到表变量中 INSERT INTO @temp(UID, Name, Pwd ) SELECT UID,Name,Pwd FROM [User] ORDER BY UID; -- 声明变量 DECLARE @UID AS BIGINT, @Name AS VARCHAR(50), @Pwd AS VARCHAR(50); WHILE EXISTS(SELECT UID FROM @temp) BEGIN -- 无序堆top1 有索引 top1 SET ROWCOUNT 1 无差别 SELECT top 1 @UID= UID, @Name= Name,@Pwd= Pwd FROM @temp; -- SELECT @UID,@Name,@Pwd PRINT ‘主键‘+ cast(@UID as varchar(50))+‘用户名‘+@Name+‘密码‘+@Pwd -- SET ROWCOUNT 0 DELETE FROM @temp WHERE UID=@UID; END
时间: 2024-10-11 21:58:34