Sqlserver 循环表

CREATE TABLE dbo.[User] (
  UID BIGINT IDENTITY
 ,Name ) NOT NULL
 ,Pwd ) 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 ),
    Pwd )
);

-- 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,
    ),
    );

WHILE EXISTS(SELECT UID FROM @temp)
BEGIN
    -- 无序堆top1 有索引 top1  SET ROWCOUNT 1 无差别
     @UID= UID, @Name= Name,@Pwd= Pwd FROM @temp;
   -- SELECT @UID,@Name,@Pwd
    ))+'用户名'+@Name+'密码'+@Pwd
   -- SET ROWCOUNT 0
    DELETE FROM @temp WHERE UID=@UID;
END