我有以下代码，但运行时间太长。有没有办法简化它？我需要iotransactiondate取决于两个不同列上的iostatus，这就是为什么我必须两次加入相同的表格。
SELECT
pg.pgrpName1 [Santiye],
p.prsncode [Sicil No],
p.[prsnname1] [Adi],
p.[prsnname2] [Soyadi],
CLT.clntName1 [Firmasi],
fg3.grp3Name1 [Gorevi],
prf.pcntrName1 [Ekibi],
lnk11.lgrp11Name1 [Kaldigi Yer],
lnk12.lgrp12Name1 +' - '+lnk12.lgrp12Name2 [Kamp/Adres],
lnk13.lgrp13Name1 [Oda No],
ttt.[iotransactiondate] [Giris Tarihi/Saati],
tt.[iotransactiondate] [Cikis Tarihi/Saati],
prsnEText4 [Vardiya],
tz.tzoneName1 [GECE/GUNDUZ]
--ps.psStartDate,
--ps.psFinishDate,
--[Giris/Cikis] = ( CASE
-- WHEN [t.iostatus] = 0 THEN 'Giris'
-- WHEN [t.iostatus] = 1 THEN 'Cikis'
-- ELSE 'Uzaya Gitti'
-- END )
FROM [Exen].[dbo].[IOTransaction] t
LEFT JOIN dbo.person p
ON t.ioPrsnRefId = p.prsnRefId
LEFT JOIN dbo.PersonShift ps
ON ps.psPrsnRefId = p.prsnRefId
LEFT JOIN dbo.TimeZoneMess tz
ON tz.tzoneRefId = ps.psTzoneRefId
LEFT JOIN dbo.[PersonGroup] pg
ON pg.pgrpRefId = p.prsnPgrpRefId
LEFT JOIN FreeGroup3 fg3
ON fg3.grp3RefId = p.prsnGrp3RefId
left join Client CLT
ON CLT.clntRefId = P.prsnClntRefId
LEFT JOIN [ProfitCenter] prf
ON prf.pcntrRefId = p.prsnPcntrRefId
LEFT JOIN LinkedGroup11 lnk11
ON lnk11.lgrp11RefId = p.prsnLgrp11RefId
LEFT JOIN LinkedGroup12 lnk12
ON lnk12.lgrp12RefId = p.prsnLgrp12RefId
LEFT JOIN LinkedGroup13 lnk13
ON lnk13.lgrp13RefId = p.prsnLgrp13RefId
LEFT JOIN [Exen].[dbo].[IOTransaction] tt
ON t.ioPrsnRefId = tt.ioPrsnRefId and tt.[iostatus] = 1
LEFT JOIN [Exen].[dbo].[IOTransaction] ttt
ON t.ioPrsnRefId = ttt.ioPrsnRefId and ttt.[iostatus] = 0
WHERE ( t.[iotransactiondate] = (SELECT Min(m.[ioTransactionDate])
FROM IOTransaction m
WHERE m.ioPrsnRefId = t.ioPrsnRefId
AND Cast(m.[iotransactiondate] AS DATE)
= Cast
(
t.[iotransactiondate] AS DATE)
GROUP BY m.ioPrsnRefId)
OR t.[iotransactiondate] = (SELECT Max(m.[iotransactiondate])
FROM IOTransaction m
WHERE m.ioPrsnRefId = t.ioPrsnRefId
AND Cast(m.[iotransactiondate] AS
DATE) =
Cast(
t.[iotransactiondate] AS DATE)
GROUP BY m.ioPrsnRefId) )
AND p.[prsnname1] IS NOT NULL
AND t.iotransactiondate > '01.12.2016 00:00:00.000'
AND ps.psStartDate <= t.[iotransactiondate]
AND ps.psFinishDate > t.[iotransactiondate]
--and p.[prsnname1] ='NAIM'
AND tz.tzoneRefId =4
GROUP BY pg.pgrpName1 ,
t.ioPrsnRefId,
prsncode,
prsnname1,
prsnname2,
t.[iotransactiondate],
tt.[iotransactiondate],
ttt.[iotransactiondate],
t.iostatus,
tz.tzoneName1,
ps.psStartDate,
ps.psFinishDate,
prsnEText4,
fg3.grp3Name1,
CLT.clntName1,
prf.pcntrName1,
lgrp11Name1,
lgrp12Name1,
lgrp12Name2,
lgrp13Name1
ORDER BY P.prsncode, t.iotransactiondate desc
特别是这部分我猜的时间太长了，但我找不到另一种方式。
LEFT JOIN [Exen].[dbo].[IOTransaction] tt
ON t.ioPrsnRefId = tt.ioPrsnRefId and tt.[iostatus] = 1
LEFT JOIN [Exen].[dbo].[IOTransaction] ttt
ON t.ioPrsnRefId = ttt.ioPrsnRefId and ttt.[iostatus] = 0
答案 0 :(得分：0)
我删除了连接部分（tt。和ttt。）并使用子查询第二次选择。
SELECT
pg.pgrpName1 [Santiye],
p.prsncode [Sicil No],
p.[prsnname1] [Adi],
p.[prsnname2] [Soyadi],
CLT.clntName1 [Firmasi],
fg3.grp3Name1 [Gorevi],
prf.pcntrName1 [Ekibi],
lnk11.lgrp11Name1 [Kaldigi Yer],
lnk12.lgrp12Name1 +' - '+lnk12.lgrp12Name2 [Kamp/Adres],
lnk13.lgrp13Name1 [Oda No],
t.[iotransactiondate] [Giris Tarihi/Saati],
(SELECT
t2.[iotransactiondate]
FROM [Exen].[dbo].[IOTransaction] t2
WHERE ( t2.[iotransactiondate] = (SELECT Min(m.[ioTransactionDate])
FROM IOTransaction m
WHERE m.ioPrsnRefId = t2.ioPrsnRefId
AND Cast(m.[iotransactiondate] AS DATE)
= Cast
(
t2.[iotransactiondate] AS DATE)
GROUP BY m.ioPrsnRefId)
OR t2.[iotransactiondate] = (SELECT Max(m.[iotransactiondate])
FROM IOTransaction m
WHERE m.ioPrsnRefId = t2.ioPrsnRefId
AND Cast(m.[iotransactiondate] AS
DATE) =
Cast(
t2.[iotransactiondate] AS DATE)
GROUP BY m.ioPrsnRefId) )
AND p.[prsnname1] IS NOT NULL
AND t2.iotransactiondate > '01.12.2016 00:00:00.000'
AND ps.psStartDate <= t2.[iotransactiondate]
AND ps.psFinishDate > t2.[iotransactiondate]
--and p.[prsnname1] ='NAIM'
--AND tz.tzoneRefId =4
and ioStatus = 1
and cast(t2.ioTransactionDate as date) = cast(t.ioTransactionDate as date) and t.ioPrsnRefId = t2.ioPrsnRefId
GROUP BY
t2.[iotransactiondate]
)
AS [Cikis Tarihi/Saati],
prsnEText4 [Vardiya],
tz.tzoneName1 [GECE/GUNDUZ]
--ps.psStartDate,
--ps.psFinishDate,
--[Giris/Cikis] = ( CASE
-- WHEN [t.iostatus] = 0 THEN 'Giris'
-- WHEN [t.iostatus] = 1 THEN 'Cikis'
-- ELSE 'Uzaya Gitti'
-- END )
FROM [Exen].[dbo].[IOTransaction] t
LEFT JOIN dbo.person p
ON t.ioPrsnRefId = p.prsnRefId
LEFT JOIN dbo.PersonShift ps
ON ps.psPrsnRefId = p.prsnRefId
LEFT JOIN dbo.TimeZoneMess tz
ON tz.tzoneRefId = ps.psTzoneRefId
LEFT JOIN dbo.[PersonGroup] pg
ON pg.pgrpRefId = p.prsnPgrpRefId
LEFT JOIN FreeGroup3 fg3
ON fg3.grp3RefId = p.prsnGrp3RefId
left join Client CLT
ON CLT.clntRefId = P.prsnClntRefId
LEFT JOIN [ProfitCenter] prf
ON prf.pcntrRefId = p.prsnPcntrRefId
LEFT JOIN LinkedGroup11 lnk11
ON lnk11.lgrp11RefId = p.prsnLgrp11RefId
LEFT JOIN LinkedGroup12 lnk12
ON lnk12.lgrp12RefId = p.prsnLgrp12RefId
LEFT JOIN LinkedGroup13 lnk13
ON lnk13.lgrp13RefId = p.prsnLgrp13RefId
WHERE ( t.[iotransactiondate] = (SELECT Min(m.[ioTransactionDate])
FROM IOTransaction m
WHERE m.ioPrsnRefId = t.ioPrsnRefId
AND Cast(m.[iotransactiondate] AS DATE)
= Cast
(
t.[iotransactiondate] AS DATE)
GROUP BY m.ioPrsnRefId)
OR t.[iotransactiondate] = (SELECT Max(m.[iotransactiondate])
FROM IOTransaction m
WHERE m.ioPrsnRefId = t.ioPrsnRefId
AND Cast(m.[iotransactiondate] AS
DATE) =
Cast(
t.[iotransactiondate] AS DATE)
GROUP BY m.ioPrsnRefId) )
AND p.[prsnname1] IS NOT NULL
AND t.iotransactiondate > '01.12.2016 00:00:00.000'
AND ps.psStartDate <= t.[iotransactiondate]
AND ps.psFinishDate > t.[iotransactiondate]
--and p.[prsnname1] ='NAIM'
AND tz.tzoneRefId =4
and ioStatus = 0
GROUP BY pg.pgrpName1 ,
t.ioPrsnRefId,
prsncode,
prsnname1,
prsnname2,
t.[iotransactiondate],
t.iostatus,
tz.tzoneName1,
ps.psStartDate,
ps.psFinishDate,
prsnEText4,
fg3.grp3Name1,
CLT.clntName1,
prf.pcntrName1,
lgrp11Name1,
lgrp12Name1,
lgrp12Name2,
lgrp13Name1