SQL循环更新表单无法进行循环找不出错误

实现循环更新表单

select * into #t2 from(
select ROW_NUMBER() over(order by t2.finterid) xh,t2.finterid,t2.FItemID
from ICStockBill t1
left join ICStockBillEntry t2 on t1.FInterID=t2.FInterID 
where convert(varchar(7),FDate,120)='2023-07' and len(t1.FBillNo)=10 and t1.FBillNo like 'Xout%'and t1.FBillNo='XOUT029707') t2
  DECLARE @xh INT,@FInterID int,@FItemID int
  SET @xh = 1
  set @FInterID=(select Finterid from #t2 where xh=@xh)
  set @FItemID=(select FItemID from #t2 where xh=@xh)
  WHILE @xh <= (SELECT COUNT(*) FROM #t2)
  BEGIN
    UPDATE ICStockBillEntry
    SET 
       FSourceBillNo=CASE WHEN FSourceBillNo = '' THEN (SELECT FSourceBillNo FROM ICStockBillEntry WHERE FInterID = @FInterID AND FItemID = @FItemID and FSourceBillNo <>'') ELSE FSourceBillNo END,
       FSourceInterId=CASE WHEN FSourceInterId = 0 THEN (SELECT FSourceInterId FROM ICStockBillEntry WHERE FInterID = @FInterID AND FItemID = @FItemID and FSourceInterId<>0 ) ELSE FSourceInterId END,
       FOrderInterID=CASE WHEN FOrderInterID = 0 THEN (SELECT FOrderInterID FROM ICStockBillEntry WHERE FInterID = @FInterID AND FItemID = @FItemID and FOrderInterID<>0 ) ELSE FOrderInterID END,
       FSourceTranType=CASE WHEN FSourceTranType = 0 THEN (SELECT FSourceTranType FROM ICStockBillEntry WHERE FInterID = @FInterID AND FItemID = @FItemID and FSourceTranType<>0 ) ELSE FSourceTranType END,
       FOrderEntryID = CASE WHEN FOrderEntryID = 0 THEN (SELECT FOrderEntryID FROM ICStockBillEntry WHERE FInterID = @FInterID AND FItemID = @FItemID and FOrderEntryID<>0 ) ELSE FOrderEntryID END,
       FSourceEntryID = CASE WHEN FSourceEntryID = 0 THEN (SELECT FSourceEntryID FROM ICStockBillEntry WHERE FInterID = @FInterID AND FItemID = @FItemID and FSourceEntryID<>0 ) ELSE FSourceEntryID END
    WHERE  FInterID = @FInterID AND FItemID = @FItemID
   SET @xh = @xh + 1
   END

【以下回答由 GPT 生成】

问题所在的地方是在循环更新表单的SQL查询中，未对循环变量进行递增。

以下是对问题的解决方案:

-- 创建临时表 #t2
select ROW_NUMBER() over(order by t2.finterid) xh, t2.finterid, t2.FItemID
into #t2
from ICStockBill t1
left join ICStockBillEntry t2 on t1.FInterID=t2.FInterID 
where convert(varchar(7),FDate,120)='2023-07' 
and len(t1.FBillNo)=10 
and t1.FBillNo like 'Xout%' 
and t1.FBillNo='XOUT029707'

-- 设置初始值和变量
DECLARE @xh INT, @FInterID int, @FItemID int
SET @xh = 1

-- 循环更新表单
WHILE @xh <= (SELECT COUNT(*) FROM #t2)
BEGIN
    -- 获取当前循环的 FInterID 和 FItemID
    SELECT @FInterID = FInterID, @FItemID = FItemID
    FROM #t2
    WHERE xh = @xh

    -- 更新表单
    UPDATE ICStockBillEntry
    SET FSourceBillNo = CASE WHEN FSourceBillNo = '' 
                             THEN (SELECT FSourceBillNo 
                                   FROM ICStockBillEntry 
                                   WHERE FInterID = @FInterID 
                                   AND FItemID = @FItemID 
                                   AND FSourceBillNo <> '')
                             ELSE FSourceBillNo
                        END
    WHERE FInterID = @FInterID 
    AND FItemID = @FItemID

    -- 递增循环变量 @xh
    SET @xh = @xh + 1
END

-- 删除临时表 #t2
DROP TABLE #t2;

解决方案中的改进包括： 1. 使用临时表 #t2 存储需要更新的数据行，避免在循环过程中多次查询表数据。 2. 使用 SELECT @FInterID = FInterID, @FItemID = FItemID 获取当前循环的 FInterID 和 FItemID，避免在更新表单时多次查询。 3. 在每次循环结束后，增加 SET @xh = @xh + 1，递增循环变量 @xh。

通过以上优化，可以实现循环更新表单的SQL查询，并解决问题。

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