我写了这篇文章。但执行时间差不多是01:12秒。任何人都可以帮助我优化sp？
declare @R71_TERM_PARA CHAR(3) = '14f'
--AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- REG-LOA
SELECT TM.*
FROM (
SELECT PN.UCLA_ID
,PN.FULL_NAME_PERSON
,SM.BAR_ASMT_CD
,SM.REG_PMT_STAT_FL
,SM.ENRL_WTHDRW_CD
,SM.JOINT_STU_FL
,TY.ADM_TERM_CD
,TD_ADM.TERM_SEQ_NUM AS ADM_TSEQ
,TT.TERM_CD AS CURR_TERM
,TT.TERM_SEQ_NUM AS CURR_TSEQ
,TT.CAREER_CD
,TT.CAREER_SUFX_CD
,TT.REG_TYP_CD
,PT.COLL_CD
,PT.MAJOR_CD
,PT.DEG_CD
,PT.PROG_PRIO_FL
,TT_PRV1.TERM_CD AS PRV1_TERM
,TT_PRV1.TERM_SEQ_NUM AS PRV1_TSEQ
,TT_PRV1.REG_TYP_CD AS PRV1_REG_TYP
,SM_PRV1.REG_PMT_STAT_FL AS PRV1_PMT_FL
,SM_PRV1.ENRL_WTHDRW_CD AS PRV1_WTHDRW_CD
,TT_PRV1.CAREER_CD AS PRV1_CAREER
,TT_PRV1.CAREER_SUFX_CD AS PRV1_SUFX
,TT_PRV2.TERM_CD AS PRV2_TERM
,TT_PRV2.TERM_SEQ_NUM AS PRV2_TSEQ
,TT_PRV2.REG_TYP_CD AS PRV2_REG_TYP
,SM_PRV2.REG_PMT_STAT_FL AS PRV2_PMT_FL
,SM_PRV2.ENRL_WTHDRW_CD AS PRV2_WTHDRW_CD
,TT_PRV2.CAREER_CD AS PRV2_CAREER
,TT_PRV2.CAREER_SUFX_CD AS PRV2_SUFX
,TL.LOA_STRT_TERM_CD
,TL.LOA_STRT_TSEQ
,TL.LOA_RET_TERM_CD
,TL.LOA_RET_TSEQ
,TL.LOA_APRV_DT
,TL.LOA_PETN_TYP_CD
FROM ID0APT AS AP
INNER JOIN
ID0PNT AS PN
ON AP.UCLA_ID = PN.UCLA_ID
AND AP.NAME_SEQ_NUM = PN.NAME_SEQ_NUM
INNER JOIN
SR0SMT AS SM
ON AP.UCLA_ID = SM.STU_ID
INNER JOIN
SR0TTT AS TT
ON TT.STU_ID = SM.STU_ID
AND TT.TERM_CD = SM.TERM_CD
INNER JOIN
SR0TYT AS TY
ON TT.STU_ID = TY.STU_ID
AND TT.CAREER_CD = TY.CAREER_CD
AND TT.CAREER_SUFX_CD = TY.CAREER_SUFX_CD
INNER JOIN
SR0PTT AS PT
ON TT.STU_ID = PT.STU_ID
AND TT.TERM_CD = PT.TERM_CD
AND TT.CAREER_CD = PT.CAREER_CD
AND TT.CAREER_SUFX_CD = PT.CAREER_SUFX_CD
LEFT JOIN
SR0TDT AS TD_ADM
ON TY.ADM_TERM_CD = TD_ADM.TERM_CD
LEFT JOIN
SR0TTT AS TT_PRV1
ON TT.STU_ID = TT_PRV1.STU_ID
AND TT.CAREER_CD = TT_PRV1.CAREER_CD
AND TT.CAREER_SUFX_CD = TT_PRV1.CAREER_SUFX_CD
AND CASE
--DENTAL, GRADUATE, UNDEGRADUATE PARAMETERS
WHEN TT.CAREER_CD = 'D'
OR TT.CAREER_CD = 'G'
OR TT.CAREER_CD = 'U' THEN
CASE RIGHT(SM.TERM_CD,1)
WHEN 'F' THEN SM.TERM_SEQ_NUM - 3
ELSE SM.TERM_SEQ_NUM - 1
END
--LAW, MEDICAL PARAMETERS
ELSE
CASE RIGHT(SM.TERM_CD,1)
WHEN 'F' THEN SM.TERM_SEQ_NUM - 3
ELSE SM.TERM_SEQ_NUM - 2
END
END = TT_PRV1.TERM_SEQ_NUM
LEFT JOIN
SR0SMT AS SM_PRV1
ON TT_PRV1.STU_ID = SM_PRV1.STU_ID
AND TT_PRV1.TERM_CD = SM_PRV1.TERM_CD
LEFT JOIN
SR0TTT AS TT_PRV2
ON TT.STU_ID = TT_PRV2.STU_ID
AND TT.CAREER_CD = TT_PRV2.CAREER_CD
AND TT.CAREER_SUFX_CD = TT_PRV2.CAREER_SUFX_CD
AND CASE
--DENTAL, GRADUATE, UNDERGRADUATE PARAMETERS
WHEN TT.CAREER_CD = 'D'
OR TT.CAREER_CD = 'G'
OR TT.CAREER_CD = 'U' THEN
CASE RIGHT(SM.TERM_CD,1)
WHEN 'S' THEN SM.TERM_SEQ_NUM - 2
ELSE SM.TERM_SEQ_NUM - 4
END
--LAW, MEDICAL PARAMETERS
ELSE SM.TERM_SEQ_NUM - 5
END = TT_PRV2.TERM_SEQ_NUM
LEFT JOIN
SR0SMT AS SM_PRV2
ON TT_PRV2.STU_ID = SM_PRV2.STU_ID
AND TT_PRV2.TERM_CD = SM_PRV2.TERM_CD
INNER JOIN
SR0TLT AS TL
ON TT.STU_ID = TL.STU_ID
AND TT.CAREER_CD = TL.CAREER_CD
AND TT.CAREER_SUFX_CD = TL.CAREER_SUFX_CD
,SR0TDT AS TD
WHERE
SM.BAR_ASMT_CD NOT IN ('N','X')
AND AP.APP_ID = 'SR0'
AND TD.TERM_CD = @R71_TERM_PARA
AND SM.TERM_SEQ_NUM >= TD.TERM_SEQ_NUM
--LATEST LOA START TERM BASED ON TERM VALUE
AND TL.LOA_STRT_TSEQ IN
(
SELECT MAX(TL_MAX.LOA_STRT_TSEQ)
FROM SR0TLT AS TL_MAX
WHERE TL_MAX.STU_ID = TT.STU_ID
AND TL_MAX.CAREER_CD = TT.CAREER_CD
AND TL_MAX.CAREER_SUFX_CD = TT.CAREER_SUFX_CD
AND TL_MAX.LOA_STRT_TSEQ <= TT.TERM_SEQ_NUM
)
--LATEST LOA START TERM BASED ON TERM VALUE
AND TL.LOA_APRV_DT IN
(
SELECT MAX(TL_DT.LOA_APRV_DT)
FROM SR0TLT AS TL_DT
WHERE TL_DT.STU_ID = TT.STU_ID
AND TL_DT.CAREER_CD = TT.CAREER_CD
AND TL_DT.CAREER_SUFX_CD = TT.CAREER_SUFX_CD
AND TL_DT.LOA_STRT_TSEQ =
(
SELECT MAX(TL_MAX.LOA_STRT_TSEQ)
FROM SR0TLT AS TL_MAX
WHERE TL_MAX.STU_ID = TT.STU_ID
AND TL_MAX.CAREER_CD = TT.CAREER_CD
AND TL_MAX.CAREER_SUFX_CD = TT.CAREER_SUFX_CD
AND TL_MAX.LOA_STRT_TSEQ <= TT.TERM_SEQ_NUM
)
)
) AS TM
WHERE --VALIDATE ONLY VALID TERMS
(
(
TM.CAREER_CD IN ('D','M')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S','2')
)
OR
(
TM.CAREER_CD IN ('G','L','U')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S')
)
)
AND (
(
(
(
--LOA MUST BE WITHIN LOA PETITION RANGE
TM.REG_TYP_CD = 'LOA'
AND (
TM.CURR_TSEQ > TM.LOA_RET_TSEQ
OR TM.BAR_ASMT_CD = 'I'
OR ( TM.BAR_ASMT_CD IN ('B','Y')
AND TM.ENRL_WTHDRW_CD NOT IN ('C','X')
)
OR (
TM.CURR_TERM = TM.LOA_STRT_TERM_CD
AND TM.PROG_PRIO_FL = 'Y'
)
)
)
OR
(
--LOA MUST BE WITHIN LOA PETITION RANGE
TM.REG_TYP_CD <> 'LOA'
AND TM.CURR_TSEQ < TM.LOA_RET_TSEQ
AND TM.CURR_TSEQ > TM.LOA_STRT_TSEQ
)
OR
(
--FILED FOR LEAVE BUT INVALID BAR_ASMT_CD
TM.ENRL_WTHDRW_CD = 'L'
AND TM.REG_PMT_STAT_FL = 'N'
AND TM.BAR_ASMT_CD NOT IN ('D','Z')
)
)
)
OR (
--RLA MUST EQUAL PETITION RETURN TERM IN PREVIOUS LOA PETITION RANGE
TM.REG_TYP_CD = 'RLA'
AND TM.CURR_TERM NOT IN
(
SELECT TL.LOA_RET_TERM_CD
FROM SR0TLT AS TL
WHERE TL.STU_ID = TM.UCLA_ID
AND TL.CAREER_CD = TM.CAREER_CD
AND TL.CAREER_SUFX_CD = TM.CAREER_SUFX_CD
--LATEST LOA START TERM BASED ON TERM VALUE
AND TL.LOA_STRT_TSEQ IN
(
SELECT MAX(TL_MAX.LOA_STRT_TSEQ)
FROM SR0TLT AS TL_MAX
WHERE TL_MAX.STU_ID = TM.UCLA_ID
AND TL_MAX.CAREER_CD = TM.CAREER_CD
AND TL_MAX.CAREER_SUFX_CD = TM.CAREER_SUFX_CD
AND TL_MAX.LOA_STRT_TSEQ < TM.CURR_TSEQ
)
--VALIDATE ONLY VALID TERMS
AND (
(
TM.CAREER_CD IN ('D','M')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S','2')
)
OR
(
TL.CAREER_CD IN ('G','L','U')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S')
)
)
)
)
OR (
(
(
--RLA MUST EQUAL PETITION RETURN TERM
TM.REG_TYP_CD = 'RLA'
AND TM.CURR_TERM <> TM.LOA_RET_TERM_CD
AND TM.CURR_TSEQ > TM.LOA_STRT_TSEQ
)
OR
(
--RLA MUST EQUAL PETITION RETURN TERM
TM.REG_TYP_CD <> 'RLA'
AND TM.CURR_TERM = TM.LOA_RET_TERM_CD
)
)
)
)
UNION
SELECT TM.*
FROM (
SELECT PN.UCLA_ID
,PN.FULL_NAME_PERSON
,SM.BAR_ASMT_CD
,SM.REG_PMT_STAT_FL
,SM.ENRL_WTHDRW_CD
,SM.JOINT_STU_FL
,TY.ADM_TERM_CD
,TD_ADM.TERM_SEQ_NUM AS ADM_TSEQ
,TT.TERM_CD AS CURR_TERM
,TT.TERM_SEQ_NUM AS CURR_TSEQ
,TT.CAREER_CD
,TT.CAREER_SUFX_CD
,TT.REG_TYP_CD
,PT.COLL_CD
,PT.MAJOR_CD
,PT.DEG_CD
,PT.PROG_PRIO_FL
,TT_PRV1.TERM_CD AS PRV1_TERM
,TT_PRV1.TERM_SEQ_NUM AS PRV1_TSEQ
,TT_PRV1.REG_TYP_CD AS PRV1_REG_TYP
,SM_PRV1.REG_PMT_STAT_FL AS PRV1_PMT_FL
,SM_PRV1.ENRL_WTHDRW_CD AS PRV1_WTHDRW_CD
,TT_PRV1.CAREER_CD AS PRV1_CAREER
,TT_PRV1.CAREER_SUFX_CD AS PRV1_SUFX
,TT_PRV2.TERM_CD AS PRV2_TERM
,TT_PRV2.TERM_SEQ_NUM AS PRV2_TSEQ
,TT_PRV2.REG_TYP_CD AS PRV2_REG_TYP
,SM_PRV2.REG_PMT_STAT_FL AS PRV2_PMT_FL
,SM_PRV2.ENRL_WTHDRW_CD AS PRV2_WTHDRW_CD
,TT_PRV2.CAREER_CD AS PRV2_CAREER
,TT_PRV2.CAREER_SUFX_CD AS PRV2_SUFX
,'' AS LOA_STRT_TERM_CD
,0 AS LOA_STRT_TSEQ
,'' AS LOA_RET_TERM_CD
,0 AS LOA_RET_TSEQ
,'' AS LOA_APRV_DT
,'' AS LOA_PETN_TYP_CD
FROM ID0APT AS AP
INNER JOIN
ID0PNT AS PN
ON AP.UCLA_ID = PN.UCLA_ID
AND AP.NAME_SEQ_NUM = PN.NAME_SEQ_NUM
INNER JOIN
SR0SMT AS SM
ON AP.UCLA_ID = SM.STU_ID
INNER JOIN
SR0TTT AS TT
ON TT.STU_ID = SM.STU_ID
AND TT.TERM_CD = SM.TERM_CD
INNER JOIN
SR0TYT AS TY
ON TT.STU_ID = TY.STU_ID
AND TT.CAREER_CD = TY.CAREER_CD
AND TT.CAREER_SUFX_CD = TY.CAREER_SUFX_CD
INNER JOIN
SR0PTT AS PT
ON TT.STU_ID = PT.STU_ID
AND TT.TERM_CD = PT.TERM_CD
AND TT.CAREER_CD = PT.CAREER_CD
AND TT.CAREER_SUFX_CD = PT.CAREER_SUFX_CD
LEFT JOIN
SR0TDT AS TD_ADM
ON TY.ADM_TERM_CD = TD_ADM.TERM_CD
LEFT JOIN
SR0TTT AS TT_PRV1
ON TT.STU_ID = TT_PRV1.STU_ID
AND TT.CAREER_CD = TT_PRV1.CAREER_CD
AND TT.CAREER_SUFX_CD = TT_PRV1.CAREER_SUFX_CD
AND CASE
--DENTAL, GRADUATE, UNDEGRADUATE PARAMETERS
WHEN TT.CAREER_CD = 'D'
OR TT.CAREER_CD = 'G'
OR TT.CAREER_CD = 'U' THEN
CASE RIGHT(SM.TERM_CD,1)
WHEN 'F' THEN SM.TERM_SEQ_NUM - 3
ELSE SM.TERM_SEQ_NUM - 1
END
--LAW, MEDICAL PARAMETERS
ELSE
CASE RIGHT(SM.TERM_CD,1)
WHEN 'F' THEN SM.TERM_SEQ_NUM - 3
ELSE SM.TERM_SEQ_NUM - 2
END
END = TT_PRV1.TERM_SEQ_NUM
LEFT JOIN
SR0SMT AS SM_PRV1
ON TT_PRV1.STU_ID = SM_PRV1.STU_ID
AND TT_PRV1.TERM_CD = SM_PRV1.TERM_CD
LEFT JOIN
SR0TTT AS TT_PRV2
ON TT.STU_ID = TT_PRV2.STU_ID
AND TT.CAREER_CD = TT_PRV2.CAREER_CD
AND TT.CAREER_SUFX_CD = TT_PRV2.CAREER_SUFX_CD
AND CASE
--DENTAL, GRADUATE, UNDERGRADUATE PARAMETERS
WHEN TT.CAREER_CD = 'D'
OR TT.CAREER_CD = 'G'
OR TT.CAREER_CD = 'U' THEN
CASE RIGHT(SM.TERM_CD,1)
WHEN 'S' THEN SM.TERM_SEQ_NUM - 2
ELSE SM.TERM_SEQ_NUM - 4
END
--LAW, MEDICAL PARAMETERS
ELSE SM.TERM_SEQ_NUM - 5
END = TT_PRV2.TERM_SEQ_NUM
LEFT JOIN
SR0SMT AS SM_PRV2
ON TT_PRV2.STU_ID = SM_PRV2.STU_ID
AND TT_PRV2.TERM_CD = SM_PRV2.TERM_CD
,SR0TDT AS TD
WHERE
SM.BAR_ASMT_CD NOT IN ('N','X')
AND AP.APP_ID = 'SR0'
AND TD.TERM_CD = @R71_TERM_PARA
AND SM.TERM_SEQ_NUM >= TD.TERM_SEQ_NUM
) AS TM
WHERE --LOA AND RLA MUST HAVE A VALID PETIION RANGE
TM.REG_TYP_CD IN ('LOA','RLA')
AND TM.UCLA_ID NOT IN
(
SELECT TL.STU_ID
FROM SR0TLT AS TL
WHERE TL.STU_ID = TM.UCLA_ID
AND TL.CAREER_CD = TM.CAREER_CD
AND TL.CAREER_SUFX_CD = TM.CAREER_SUFX_CD
--LATEST LOA START TERM BASED ON TERM VALUE
AND TL.LOA_STRT_TSEQ IN
(
SELECT MAX(TL_MAX.LOA_STRT_TSEQ)
FROM SR0TLT AS TL_MAX
WHERE TL_MAX.STU_ID = TM.UCLA_ID
AND TL_MAX.CAREER_CD = TM.CAREER_CD
AND TL_MAX.CAREER_SUFX_CD = TM.CAREER_SUFX_CD
AND TL_MAX.LOA_STRT_TSEQ < TM.CURR_TSEQ
)
--VALIDATE ONLY VALID TERMS
AND (
(
TM.CAREER_CD IN ('D','M')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S','2')
)
OR
(
TL.CAREER_CD IN ('G','L','U')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S')
)
)
)
ORDER BY UCLA_ID
IF @@ROWCOUNT = 0
PRINT 'WARNING: NO ROWS WERE SELECTED.';
END
我认为第二个联盟中有类似的代码。是否有可能将此代码添加到CTE中，然后在需要的地方加入？
答案 0 :(得分：0)
查明上半部分和下半部分是否互斥。如果是，则将“union”更改为“union all”。另外，最终结果是否需要通过UCLA_ID排序？如果没有，那就拿出来吧。
然后不幸的是，你将不得不从一半开始，从内部子查询/派生表开始，然后从表开始。我试图阅读上半部分的猜测是从
开始select top 1 *
from ID0APT AS AP
where
AP.APP_ID = 'SR0';
确保立即返回。然后，将连接添加到下一个表中，以及任何相应的“where”。看看你是否可以通过所有连接而不会遇到大幅放缓试图拉开第一条记录。
如果确实发现速度减慢，请确保您有一个索引来满足您的复合连接。
然后你可以尝试添加底部复杂的“in”，例如
--LATEST LOA START TERM BASED ON TERM VALUE
AND TL.LOA_STRT_TSEQ IN
(
SELECT MAX(TL_MAX.LOA_STRT_TSEQ)
FROM SR0TLT AS TL_MAX
WHERE TL_MAX.STU_ID = TT.STU_ID
AND TL_MAX.CAREER_CD = TT.CAREER_CD
AND TL_MAX.CAREER_SUFX_CD = TT.CAREER_SUFX_CD
AND TL_MAX.LOA_STRT_TSEQ <= TT.TERM_SEQ_NUM
)
这些是相关的子查询，我认为这将是你问题的开始。
然后你可以看一下复杂的“OR”，例如
WHERE --VALIDATE ONLY VALID TERMS
(
(
TM.CAREER_CD IN ('D','M')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S','2')
)
OR
(
TM.CAREER_CD IN ('G','L','U')
AND RIGHT(TM.CURR_TERM,1) IN ('F','W','S')
)
)