SQL Server中游标的使用

DECLARE @TEMP TABLE
(
Id INT,
LawName NVARCHAR(10),
LogName VARCHAR(10),
countid int
)

DECLARE @Id INT;
DECLARE @LawName VARCHAR(50);
DECLARE @LogName NVARCHAR(10);

DECLARE MYCUR CURSOR FOR
(SELECT Id,LawName,LogName FROM Lawer)--声明游标

OPEN MYCUR--打开游标
FETCH NEXT FROM MYCUR INTO @Id,@LawName,@LogName
WHILE @@FETCH_STATUS = 0--当SQLCODE值为0时表明一切正常,100表示已经取到了结果集的末尾
BEGIN

DECLARE @CNT INT;
SELECT @CNT=count(Id) FROM Lawer WHERE Id=@Id AND LawName=@LawName AND LogName=@LogName

INSERT INTO @TEMP(Id,LawName,LogName,countid) VALUES(@Id,@LawName,@LogName,@CNT)
FETCH NEXT FROM MYCUR INTO @Id,@LawName,@LogName
END
CLOSE MYCUR--关闭游标
DEALLOCATE MYCUR--删除游标资源
SELECT * FROM @TEMP

/*--定位到指定位置的记录
fetch absolute 56488 from my_cursor into @id,@name,@address
select @id as id,@name as name,@address as address
--定位到当前记录相对位置记录
fetch relative -88 from my_cursor into @id,@name,@address
select @id as id,@name as name,@address as address
--定位到当前记录前一条
fetch prior from my_cursor into @id,@name,@address
select @id as id,@name as name,@address as address
--定位到当前记录后一条
fetch next from my_cursor into @id,@name,@address
select @id as id,@name as name,@address as address
--定位到首记录
fetch first from my_cursor into @id,@name,@address
select @id as id,@name as name,@address as address
--定位到尾记录
fetch last from my_cursor into @id,@name,@address
select @id as id,@name as name,@address as address
*/