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下面的 Teradata 查询大约需要 18 秒才能完成。IN 子句中传递的突出显示的值来自另一个 Oracle 数据库，因此我无法实现与该表的连接。

SELECT distinct sec.SerialNum esn, ef.EngineFamilyCd family, em.EngineModelCd model,
es.EngineSeriesCd series, sac.AircraftTailNum tailNumRef, sec.EnginePositionNum enginePosition,
o1.OrganizationId ownerOrgId, o2.OrganizationId operatorOrgId,
sec.EngineInstallationDttm installedDate, sec.EngineRemovalDttm removalDate,
sec.HardwareConfigNm hardwareConfig, sec.EngineControlNm engineControl,
sec.ApplicationSelectorNm appSelector, sec.EngineMonitorInd engineMonitorInd,
sec.EngineThrustRatingFctr engineThrustRating, sec.StatusDesc engineStatus, sec.n1modifiernum n1modifier
FROM DB_MASTER_BV.SZEngineCurrent sec, 
 DB_MASTER_BV.EngineSeries es,
DB_MASTER_BV.EngineModel em,
DB_Master_BV.EngineFamily ef,
DB_MASTER_BV.SZAircraftCurrent sac, 
 DB_MASTER_BV.Organization o1, 
 DB_MASTER_BV.Organization o2 
 WHERE sec.EngineSeriesCd = es.EngineSeriesCd 
 and es.EngineModelCd = em.EngineModelCd 
 and  em.EngineFamilyCd = ef.EngineFamilyCd 
 and sec.MasterAircraftId = sac.MasterAircraftId 
 and o1.MasterOrganizationId = sec.OwnerMasterOrganizationId 
and o2.MasterOrganizationId = sec.OperatorMasterOrganizationId 
AND (sec.SerialNum in('733276','193283','690168','741471','876374','873383','193386','906397','804314','900116','785670','900399','724321','193488','811373','779917','193699','994688',
'779410','575169','A59299','900206','193297','575484','896359','367230','810105','876485','906385','876484','707149','811222','706801','193596','731949','697881',
'889697','804626','575194','707159','706129','900230','900231','706834','811352','900229','785748','193460','888221','906272','906266','906264','906263','994356',
'194431','731966','892417','811341','577413','741572','575564','889262','706956','876157','900257','900153','706958','706957','960436','892429','892427','900354',
'697138','645655','193352','994337','707189','697833','959190','900246','811317','577437','193643','697976','890692','193229','965579','900137','900135','894897',
'697723','193363','193367','785505','907077','959184','811311','706526','577302','706529','994332','702792','706663','779834','731931','960127','193371','876183',
'741563','193235','803843','577320','994318','907087','741460','907086','959170','994462','900464','193626','877503','643711','811202','811201','704585','193504',
'193500','875246','704876','725834','699783','699780','802380','900304','706885','906191','577773','959152','872574','811435','697388','699381','892485','577698',
'907035','811445','907039','894999','894857','894595','697273','894597','959139','577894','874898','706959','900424','193337','577697','907011','875696','699555',
'699554','575629','906149','906150','193452','962968','811264','811266','962970','875395','699543','575638','906153','857962','896247','858349','779746','906161',
'906928','802857','779640','193424','550309','424520','550305','575608','872517','906169','892196','811386','811385','906173','907220','959234','876666','959231',
'876662','893785','875914','802649','550218','550315','906111','741984','550319','906405','906501','550118','643371','785254','550116','550117','802946','906629',
'907145','550325','550324','906837','550320','906838','702591','550220','550227','906415','690289','906517','704416','731431','550125','959201','906413','994176',
'550333','550140','550337','891651','550141','550338','906746','907269','550132','550137','550138','892914','550342','906123','550153','550345','950923','906129',
'873188','906850','906953','690270','890713','645352','893127','697590','874826','424439','893126','907110','550144','856305','690269','892824','550256','550257',
'906867','907186','960852','720754','960851','906866','888607','805573','811530','960756','872352','550266','550267','550264','811518','888896','906730','994958',
'892247','960970','875186','906987','424124','550232','A59303','702660','875885','811609','888626','424219','906897','994981','731502','697496','695345','962996',
'894371','907153','805541','907154','424337','906613','906615','900512','906610','956141','994611','804582','994718','888648','575219','888756','896973','424395',
'872117','A59227','697616','731380','697614','900161','690410','994213','956155','956154','779492','994231','702876','577248','994727','193818','890879','722243',
'906499','577354','888560','645121','896972','960823','804279','900175','888853','193724','550285','550282','906469','994803','906466','888299','877141','890984',
'695688','994533','888327','A59348','A59346','994410','733116','550296','550290','550292','906478','731763','725658','896408','645145','994751','731654','740358',
'906441','550158','193849','906543','906448','994262','575824','424186','906345','643663','888305','906243','906244','702963','906453','906452','956119','906451',
'956116','950489','550166','906454','367457','896764','575833','994268','906252','994127','733236','906258','956123','550178','994777','956126','956127','956128',
'906786','906788','906687','643290','994631','956225','994632','888574','906365','804228','731599','643682','550182','804369','994784','550186','550183','888826',
'575127','906439','890482','906438','906691','890472','994509','193147','575718','804215','575276','994793','897257'))
and END(sec.EngineValidPd) is until_changed 
 order by esn

此外，如果有超过 1000 条记录，我将按如下方式执行 IN 子句 AND (sec.SerialNum in(first 999 recods) OR sec.SerialNum in(next 999 recods)... OR sec.SerialNum in(recods)) 请建议比上述查询更快且不会导致 IN 子句中超过 1000 条记录出现问题的解决方案

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1 回答 1

1

您的 Teradata 版本是什么？

在 TD14 中，有一个内置的表格函数来拆分一串值，您可以简单地在一个字符串中传递所有值：

AND sec.SerialNum IN
 (
   SELECT token
   FROM TABLE (STRTOK_SPLIT_TO_TABLE(1, '733276,193283,690168,741471,876374', ',')
        RETURNS (outkey INTEGER,
                 tokennum INTEGER,
                 token VARCHAR(20) CHARACTER SET UNICODE)
              ) AS d
 )
于 2013-10-03T21:23:49.030 回答