谁能帮助我提高 SQL 2000 中游标逻辑的性能。它在 SQl2005 和 SQL2008 中运行良好,但在 SQL 2000 中运行至少需要 20 分钟。顺便说一句,我永远不会选择使用游标,我没有编写这段代码,只是想让它运行得更快。短期内无法将此客户端升级到 2005/2008。
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------- Rollup totals in the chart of accounts hierarchy
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DECLARE @B_SubTotalAccountID int, @B_Debits money, @B_Credits money, @B_YTDDebits money, @B_YTDCredits money
DECLARE Bal CURSOR FAST_FORWARD FOR
SELECT SubTotalAccountID, Debits, Credits, YTDDebits, YTDCredits FROM xxx
WHERE AccountType = 0 AND SubTotalAccountID Is Not Null and (abs(credits)+abs(debits)+abs(ytdcredits)+abs(ytddebits)<>0)
OPEN Bal
FETCH NEXT FROM Bal INTO @B_SubTotalAccountID, @B_Debits, @B_Credits, @B_YTDDebits, @B_YTDCredits
--For Each Active Account
WHILE @@FETCH_STATUS = 0
BEGIN
--Loop Until end of subtotal chain is reached
WHILE @B_SubTotalAccountID Is Not Null
BEGIN
UPDATE xxx2
SET Debits = Debits + @B_Debits,
Credits = Credits + @B_Credits,
YTDDebits = YTDDebits + @B_YTDDebits,
YTDCredits = YTDCredits + @B_YTDCredits
WHERE GLAccountID = @B_SubTotalAccountID
SET @B_SubTotalAccountID = (SELECT SubTotalAccountID FROM xxx2 WHERE GLAccountID = @B_SubTotalAccountID)
END
FETCH NEXT FROM Bal INTO @B_SubTotalAccountID, @B_Debits, @B_Credits, @B_YTDDebits, @B_YTDCredits
END
CLOSE Bal
DEALLOCATE Bal
最佳答案
Update xx2
Set Credits = Credits + X1.CreditTotal
, Debits = Debits + X1.DebitTotal
, YtdDebits = YtdDebits + X1.YtdDebitTotal
, YtdCredits = YtdCredits + X1.YtdDebitTotal
From xx2 As X2
Join (
Select SubTotalAccountID, Sum(Debits) As DebitTotal, Sum(Credits) As CreditTotal
, Sum(YtdDebits) As YtdDebitTotal, Sum(YtdCredits) As YtdCreditTotal
From xxx
Where AccountType = 0
And SubTotalAccountID Is Not Null
And (
Credits <> 0
Or Debits <> 0
Or YtdCredits <> 0
Or YtdDebits <> 0
)
Group By SubTotalAccountID
) As X1
On X1.SubTotalAccountID = X2.GLAccountID
如果没有架构,我无法判断 xxx
表是否会为给定的 SubTotalAccountId 返回多行。我假设它可以按此列对值进行分组,以便每个 SubTotalAccountId 获得一行。
我还用简单的零检查替换了 WHERE 子句中对 ABS 的使用。这应该会快得多。
此 UPDATE 语句应该完全替代您的游标。
关于sql - 帮助用更好的代码替换这个 SQL 游标,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2653720/