T_SQL While循环

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    很久没有写过SQL了，今天写了一个循环数据更新，以备以后查看：

 

DECLARE @Count int ,@SortIndex int,@strSQL varchar(500)
SET @Count=(SELECT COUNT(*) FROM SCO_BehindMenu WHERE ParentId='f320a77e-096b-4929-82df-86cc41ffc3dc')
SET @SortIndex=0
WHILE(@SortIndex<@Count)
BEGIN
	SET @strSQL='UPDATE SCO_BehindMenu SET SortIndex='+STR(@SortIndex+1)+' WHERE MenuId=('
	SET @strSQL=@strSQL+'SELECT TOP 1 MenuId FROM SCO_BehindMenu WHERE ParentId=''f320a77e-096b-4929-82df-86cc41ffc3dc'' AND MenuId NOT IN (SELECT TOP '+STR(@SortIndex)+' MenuId FROM SCO_BehindMenu WHERE ParentId=''f320a77e-096b-4929-82df-86cc41ffc3dc'' ORDER BY MenuId) ORDER BY MenuId)'
	SET @SortIndex=@SortIndex+1
	print @strSQL
	EXEC(@strSQL)
END