Oracle中SQL查询的调优
我非常感谢您在调优下面的SQL查询时提供的帮助。当我取消它时，它持续运行了10分钟 MARC_SEL在52秒内给了我31253张唱片 MVKE_SEL在22秒内给了我431060张唱片 我对它进行了重构以使用with子句，但没有做太多的更改。我还可以合并什么来加快它。请帮忙Oracle中SQL查询的调优,sql,oracle,performance,Sql,Oracle,Performance,我非常感谢您在调优下面的SQL查询时提供的帮助。当我取消它时，它持续运行了10分钟 MARC_SEL在52秒内给了我31253张唱片 MVKE_SEL在22秒内给了我431060张唱片 我对它进行了重构以使用with子句，但没有做太多的更改。我还可以合并什么来加快它。请帮忙 WITH ALL_XSAP_MATNR AS (SELECT DISTINCT XSAP.MATNR,XSAP.MTART,XSAP.SOURCE FROM XXX_MAIN.XXX_XSAP XSAP
WITH ALL_XSAP_MATNR
AS (SELECT DISTINCT XSAP.MATNR,XSAP.MTART,XSAP.SOURCE FROM XXX_MAIN.XXX_XSAP XSAP
WHERE SOURCE = 'SP' )
, MARC_SEL AS
( SELECT DISTINCT A.SOURCE
,MARA.MATNR
,MARA.MTART
,MARA.MBRSH
,MARC.WERKS
,NVL(PX.WERKS,'/') DWERK
,NVL(MBEW.HKMAT,'/') HKMAT
,NVL(MBEW.EKALR,'/') EKALR
,NVL(MARC.STAWN,'/') STAWN
FROM ALL_XSAP_MATNR A
, XXX_MAIN.XXX_SAP_MARA MARA
, XXX_MAIN.XXX_SAP_MARC MARC
, XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
, XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART
AND MARA.MATNR = MARC.MATNR
AND MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY
AND PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP'
)
, MVKE_SEL AS
( SELECT DISTINCT
MVKE.MATNR
,'/' LEGACY_ORG
,'/' LEGACY_MATNR
,NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG
,NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG
-- ,NVL(TVRKME.MSEH3,'/') VRKME
,NVL(MVKE.KONDM,'/') KONDM
,NVL(MVKE.VERSG,'/') VERSG
,'/' IPRKZ
,'/' MHDRZ,NVL(MVKE.VMSTA,'/') VMSTA
,NVL(TO_CHAR(MVKE.VMSTD ,'YYYYMMDD' ),'/') VMSTD
,NVL(MVKE.PMATN,'/') PMATN
,NVL(MVKE.MVGR2,'/') MVGR2
,NVL(MVKE.MVGR3,'/') MVGR3
,NVL(MVKE.VAVME,'/') VAVME
,'/' MVGR4
,'/' MVGR5
,NVL(MVKE.MTPOS,'/') MTPOS
,NVL(MVKE.PRAT1,'/') PRAT1
,NVL(MVKE.SKTOF,'/') SKTOF
,'/' AUMNG
,NVL(MVKE.PRODH,'/') PRODH
,'/' MVGR1
,NVL(MVKE.KTGRM,'/') KTGRM
,MX_VKORG.DESC4
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
, XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL )
SELECT DISTINCT
MARC.SOURCE
,MARC.MATNR
,MARC.MTART
,MARC.MBRSH
,MARC.WERKS
,MARC.DWERK
,MARC.HKMAT
,MARC.EKALR
,MARC.STAWN
,MVKE.LEGACY_ORG
,MVKE.LEGACY_MATNR
,MVKE.VKORG
,MVKE.VTWEG
,MVKE.KONDM
,MVKE.VERSG
,MVKE.VMSTA
,MVKE.VMSTD
,MVKE.PMATN
,MVKE.MVGR2
,MVKE.MVGR3
,MVKE.VAVME
,MVKE.MTPOS
,MVKE.PRAT1
,MVKE.SKTOF
,MVKE.PRODH
,MVKE.KTGRM
FROM MARC_SEL MARC
, MVKE_SEL MVKE
WHERE MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4
首先简化查询，因为您不需要执行多个
DISTINCTEXISTS的方法可以消除这些连接
像这样：
WITH MARC_SEL AS (
SELECT A.SOURCE,
MARA.MATNR,
MARC.WERKS
FROM XXX_MAIN.XXX_XSAP A
INNER JOIN XXX_MAIN.XXX_SAP_MARA MARA
ON ( A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART )
INNER JOIN XXX_MAIN.XXX_SAP_MARC MARC
ON ( MARA.MATNR = MARC.MATNR )
WHERE EXISTS( SELECT 'X'
FROM XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
WHERE PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP' )
AND EXISTS( SELECT 'X'
FROM XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY )
AND A.SOURCE = 'SP'
)
, MVKE_SEL AS (
SELECT NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG,
NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG,
MX_VKORG.DESC4
FROM XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE EXISTS ( SELECT 'X'
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG )
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL
)
SELECT DISTINCT
MARC.SOURCE,
MARC.MATNR,
MVKE.VKORG,
MARC.WERKS,
MVKE.VTWEG
FROM MARC_SEL MARC
INNER JOIN MVKE_SEL MVKE
ON ( MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4 )
首先简化查询，因为您不需要执行多个DISTINCT
s（这仅在最终输出中是必需的），并且您选择了许多不输出的列。您还将连接一些未从中选择的表，如果这些表有多个匹配行，则可能会生成重复行-使用类似于EXISTS的方法可以消除这些连接
像这样：
WITH MARC_SEL AS (
SELECT A.SOURCE,
MARA.MATNR,
MARC.WERKS
FROM XXX_MAIN.XXX_XSAP A
INNER JOIN XXX_MAIN.XXX_SAP_MARA MARA
ON ( A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART )
INNER JOIN XXX_MAIN.XXX_SAP_MARC MARC
ON ( MARA.MATNR = MARC.MATNR )
WHERE EXISTS( SELECT 'X'
FROM XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
WHERE PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP' )
AND EXISTS( SELECT 'X'
FROM XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY )
AND A.SOURCE = 'SP'
)
, MVKE_SEL AS (
SELECT NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG,
NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG,
MX_VKORG.DESC4
FROM XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE EXISTS ( SELECT 'X'
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG )
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL
)
SELECT DISTINCT
MARC.SOURCE,
MARC.MATNR,
MVKE.VKORG,
MARC.WERKS,
MVKE.VTWEG
FROM MARC_SEL MARC
INNER JOIN MVKE_SEL MVKE
ON ( MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4 )
为子查询添加了提示，并在一分钟内返回
WITH ALL_XSAP_MATNR
AS (SELECT /*+ materialize */ DISTINCT XSAP.MATNR,XSAP.MTART,XSAP.SOURCE FROM XXX_MAIN.XXX_XSAP XSAP
WHERE SOURCE = 'SP' )
, MARC_SEL AS
( SELECT /*+ materialize */ DISTINCT A.SOURCE
,MARA.MATNR
,MARA.MTART
,MARA.MBRSH
,MARC.WERKS
,NVL(PX.WERKS,'/') DWERK
,NVL(MBEW.HKMAT,'/') HKMAT
,NVL(MBEW.EKALR,'/') EKALR
,NVL(MARC.STAWN,'/') STAWN
FROM ALL_XSAP_MATNR A
, XXX_MAIN.XXX_SAP_MARA MARA
, XXX_MAIN.XXX_SAP_MARC MARC
, XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
, XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART
AND MARA.MATNR = MARC.MATNR
AND MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY
AND PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP'
)
, MVKE_SEL AS
( SELECT /*+ materialize */ DISTINCT
MVKE.MATNR
,'/' LEGACY_ORG
,'/' LEGACY_MATNR
,NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG
,NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG
-- ,NVL(TVRKME.MSEH3,'/') VRKME
,NVL(MVKE.KONDM,'/') KONDM
,NVL(MVKE.VERSG,'/') VERSG
,'/' IPRKZ
,'/' MHDRZ,NVL(MVKE.VMSTA,'/') VMSTA
,NVL(TO_CHAR(MVKE.VMSTD ,'YYYYMMDD' ),'/') VMSTD
,NVL(MVKE.PMATN,'/') PMATN
,NVL(MVKE.MVGR2,'/') MVGR2
,NVL(MVKE.MVGR3,'/') MVGR3
,NVL(MVKE.VAVME,'/') VAVME
,'/' MVGR4
,'/' MVGR5
,NVL(MVKE.MTPOS,'/') MTPOS
,NVL(MVKE.PRAT1,'/') PRAT1
,NVL(MVKE.SKTOF,'/') SKTOF
,'/' AUMNG
,NVL(MVKE.PRODH,'/') PRODH
,'/' MVGR1
,NVL(MVKE.KTGRM,'/') KTGRM
,MX_VKORG.DESC4
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
, XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL )
SELECT DISTINCT /*+ use_hash(MARC,MVKE ) */
MARC.SOURCE
,MARC.MATNR
,MARC.MTART
,MARC.MBRSH
,MARC.WERKS
,MARC.DWERK
,MARC.HKMAT
,MARC.EKALR
,MARC.STAWN
,MVKE.LEGACY_ORG
,MVKE.LEGACY_MATNR
,MVKE.VKORG
,MVKE.VTWEG
,MVKE.KONDM
,MVKE.VERSG
,MVKE.VMSTA
,MVKE.VMSTD
,MVKE.PMATN
,MVKE.MVGR2
,MVKE.MVGR3
,MVKE.VAVME
,MVKE.MTPOS
,MVKE.PRAT1
,MVKE.SKTOF
,MVKE.PRODH
,MVKE.KTGRM
FROM MARC_SEL MARC
, MVKE_SEL MVKE
WHERE MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4
为子查询添加了提示，并在一分钟内返回
WITH ALL_XSAP_MATNR
AS (SELECT /*+ materialize */ DISTINCT XSAP.MATNR,XSAP.MTART,XSAP.SOURCE FROM XXX_MAIN.XXX_XSAP XSAP
WHERE SOURCE = 'SP' )
, MARC_SEL AS
( SELECT /*+ materialize */ DISTINCT A.SOURCE
,MARA.MATNR
,MARA.MTART
,MARA.MBRSH
,MARC.WERKS
,NVL(PX.WERKS,'/') DWERK
,NVL(MBEW.HKMAT,'/') HKMAT
,NVL(MBEW.EKALR,'/') EKALR
,NVL(MARC.STAWN,'/') STAWN
FROM ALL_XSAP_MATNR A
, XXX_MAIN.XXX_SAP_MARA MARA
, XXX_MAIN.XXX_SAP_MARC MARC
, XXX_MAIN.XXX_MP_WERKS_PLANT_XREF PX
, XXX_MAIN.XXX_SAP_MBEW MBEW
WHERE A.MATNR = MARA.MATNR
AND A.MTART = MARA.MTART
AND MARA.MATNR = MARC.MATNR
AND MARC.MATNR = MBEW.MATNR
AND MARC.WERKS = MBEW.BWKEY
AND PX.LEGACY_PLANT = MARC.WERKS
AND PX.SOURCE = 'SP'
)
, MVKE_SEL AS
( SELECT /*+ materialize */ DISTINCT
MVKE.MATNR
,'/' LEGACY_ORG
,'/' LEGACY_MATNR
,NVL(MX_VKORG.SAP_DE_VAL,'/') VKORG
,NVL(SUBSTR(MX_VKORG.SAP_DE,6,2),'/') VTWEG
-- ,NVL(TVRKME.MSEH3,'/') VRKME
,NVL(MVKE.KONDM,'/') KONDM
,NVL(MVKE.VERSG,'/') VERSG
,'/' IPRKZ
,'/' MHDRZ,NVL(MVKE.VMSTA,'/') VMSTA
,NVL(TO_CHAR(MVKE.VMSTD ,'YYYYMMDD' ),'/') VMSTD
,NVL(MVKE.PMATN,'/') PMATN
,NVL(MVKE.MVGR2,'/') MVGR2
,NVL(MVKE.MVGR3,'/') MVGR3
,NVL(MVKE.VAVME,'/') VAVME
,'/' MVGR4
,'/' MVGR5
,NVL(MVKE.MTPOS,'/') MTPOS
,NVL(MVKE.PRAT1,'/') PRAT1
,NVL(MVKE.SKTOF,'/') SKTOF
,'/' AUMNG
,NVL(MVKE.PRODH,'/') PRODH
,'/' MVGR1
,NVL(MVKE.KTGRM,'/') KTGRM
,MX_VKORG.DESC4
FROM XXX_MAIN.XXX_SAP_MVKE MVKE
, XXX_MAIN.XXX_MP_VKVT_XREF MX_VKORG
WHERE MX_VKORG.SOURCE_DE_VAL = MVKE.VKORG
AND SUBSTR(MX_VKORG.SAP_DE,6,2) = MVKE.VTWEG
AND MX_VKORG.SOURCE_TBL = 'SP'
AND MX_VKORG.SOURCE_DE = 'MVKE'
AND SUBSTR(MX_VKORG.SAP_DE,1,5)= 'VKORG'
AND MX_VKORG.DESC2 IS NULL )
SELECT DISTINCT /*+ use_hash(MARC,MVKE ) */
MARC.SOURCE
,MARC.MATNR
,MARC.MTART
,MARC.MBRSH
,MARC.WERKS
,MARC.DWERK
,MARC.HKMAT
,MARC.EKALR
,MARC.STAWN
,MVKE.LEGACY_ORG
,MVKE.LEGACY_MATNR
,MVKE.VKORG
,MVKE.VTWEG
,MVKE.KONDM
,MVKE.VERSG
,MVKE.VMSTA
,MVKE.VMSTD
,MVKE.PMATN
,MVKE.MVGR2
,MVKE.MVGR3
,MVKE.VAVME
,MVKE.MTPOS
,MVKE.PRAT1
,MVKE.SKTOF
,MVKE.PRODH
,MVKE.KTGRM
FROM MARC_SEL MARC
, MVKE_SEL MVKE
WHERE MARC.MATNR = MVKE.MATNR
AND MARC.WERKS = MVKE.DESC4
请不要使用WHERE
语句进行连接，而是使用LEFT | RIGHT | INNER连接。。。关于
语句。用于加入的WHERE
语句是遗留语句，不应使用。请编辑您的问题，并包括上述表/视图的CREATE TABLE
和/或CREATE VIEW
。包括定义的索引。还包括查询的解释计划的输出。谢谢。请不要使用WHERE
语句进行连接，而是使用LEFT | RIGHT | INNER连接。。。关于
语句。用于加入的WHERE
语句是遗留语句，不应使用。请编辑您的问题，并包括上述表/视图的CREATE TABLE
和/或CREATE VIEW
。包括定义的索引。还包括查询的解释计划的输出。谢谢。抱歉@MT0，我确实需要其他表中的值：我在原始问题中编辑了代码，以显示我在输出中需要的所有值。抱歉@MT0，我确实需要其他表中的值：我在原始问题中编辑了代码，以显示我在输出中需要的所有值。