Question

我有一个在WHILE循环内运行的UPDATE语句。在WHILE循环的每次迭代中，在表中计算一些计数并采取措施。

我已经尝试过使用交叉连接，但无法正常工作。

declare @rowId int    
declare @PrevRowId int
declare @Dataid int
declare @countexistIDs int
declare @countID int
Set @prevrowid=0
Set @rowId=0
Set @Dataid=0
SET @countexistIDs = 0    
SET @countID = 0

SELECT    
   isnull(t2.inqty,0) + isnull(t2.comqty,0) AS qty
   INTO #Temp       
   FROM tblitem t1,    
   tblin t2      
   WHERE t1.typeid = t2.typeid     
   AND t1.status IS NULL

SELECT top 1 @rowid = rowid, @Dataid = Dataid FROM #tempDataId     
ORDER BY rowid ASC

WHILE @PrevRowId <> @rowid
BEGIN
SET @prevRowId = @rowId 

SELECT @countID = COUNT(*) FROM tblitem     
   WHERE dataid = @dataid AND status IS NULL

SELECT @countexistIDs = COUNT(t2.typeid) FROM tblitem t2
INNER JOIN #Temp t3 ON t2.typeid = t3.typeid     
WHERE  t2.quantity <= t3.qty

IF @countexistPTIDs = @countID 
BEGIN
    UPDATE #tempDataId SET complete = 'yes' WHERE dataid = @Dataid

    UPDATE t2     
    SET invqty = t2.qty - t1.quantity    
    FROM tblitem t1, #Temp t2    
    WHERE t1.producttypeid = t2.producttypeid  
     AND t1.status IS NULL     
     AND t1.WareHouseID = t2.warehouseid   
     AND t1.dataid = @Dataid 
END

SELECT top 1 @rowid = rowid,@Dataid = dataid    
FROM #tempDataId WHERE rowid > @PrevRowId ORDER BY rowid ASC 

SET @countexistIDs = 0    
SET @countID = 0

END

我正在尝试使用查询来执行此操作，而不是遍历每个DataId。

使用while循环迭代Sql的替代方法

0 个答案: