以文本方式查看主题 - Foxtable(狐表) (http://foxtable.net/bbs/index.asp) -- 专家坐堂 (http://foxtable.net/bbs/list.asp?boardid=2) ---- 请问sql查询显示查询超时,怎么解决? (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=137353) |
-- 作者:hbhb -- 发布时间:2019/7/4 9:17:00 -- 请问sql查询显示查询超时,怎么解决? 大师:较复杂的sql查询语句,执行后显示查询超时,如何优化,或怎么解决? 比如下面的语句 S————E_LECT pzFL.FVoucherID,pzM.FDate as date,pzM.FPeriod as month,pzM.FGroupID,pzM.FNumber,pzM.FPosted as 记账标志,pzFL.FEntryID,pzFL.FExplanation as zy,pzFL.FAccountID,(case when pzfl.fdc = 1 then pzfl.famount end) as jej, (case when pzfl.fdc <> 1 then pzfl.famount end) as jed, pzFL.FCurrencyID,pzFL.FExchangeRate,pzFL.FDC,pzFL.FAmountFor,pzFL.FAmount,pzFL.FQuantity,pzFL.FMeasureUnitID,pzFL.FUnitPrice,pzFL.FDetailID,pzfz.FName + \'-\' + Format(pzm.FNumber,\'\') as pzlbname,km.FNumber as kmid,km.FName as kmname,Item8.FName as xm,Item8.FNumber as xmdl,Item9.FName as xm2,Item9.FNumber as xmdl2,Item10.FName as xm3,Item10.FNumber as xmdl3,Item11.FName as xm4 FROM t_Voucher As pzM INNER JOIN t_VoucherEntry As pzFL ON pzM.FVoucherID = pzFL.FVoucherID left join t_VoucherGroup pzfz on pzM.FGroupID = pzfz.FGroupID left join t_Account km on km.FAccountID = pzfl.FAccountID left JOIN t_ItemDetailV tailV ON pzfl.FDetailID = tailv.FDetailID left JOIN t_Item item8 ON item8.FItemID = tailv.fitemid And (tailv.fitemclassid = 1 Or tailv.fitemclassid = 8) left JOIN t_Item item9 ON item9.FItemID = tailv.fitemid And (tailv.fitemclassid = 2) left JOIN t_Item item10 ON item10.FItemID = tailv.fitemid And (tailv.fitemclassid = 3) left JOIN t_Item item11 ON item11.FItemID = tailv.fitemid And (tailv.fitemclassid > 3 And tailv.fitemclassid <> 8) where pzM.FYear = 2014 And pzM.FPeriod<= 12 ORDER BY pzM.FPeriod,pzm.FNumber,pzM.FVoucherID,pzFL.FEntryID
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-- 作者:有点蓝 -- 发布时间:2019/7/4 9:52:00 -- 1、添加必要的索引 2、尽量不要在sql里使用函数 3、使用SQLCommand,增加超时时间
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