使用多个连接调整查询

Question

我有这个查询 .. 214 Execution/min , 44.42 Avg CPU(ms) 有没有办法让它更快

SELECT        P.Id id0,
              P.ProgramId ProgramId1,
              P.ProgramName ProgramName2,
              P.ProgramLevel ProgramLevel3,
              P.Department Department4,
              P.Track Track5,
              P.AcademicYear AcademicYear6,
              P.StartTerm StartTerm7,
              P.Delivery Delivery8,
              P.Fee Fee9,
              P.City City10,
              P.STATE State11,
              P.StartDate StartDate12,
              P.Deadline Deadline13,
              P.DeadlineDisplay DeadlineDisplay14,
              P.ProgramType ProgramType15,
              O.Id as OrganizationId16,
              O.NAME OrganizationName17,
              P.ApplicationType ApplicationType18,
              P.Concentration Concentration19,
              P.ZipCode ZipCode20,
              P.Campus Campus21,
              P.WADisplayName WADisplayName22,
              P.UpdatedDate updateDate23,
              AF.Id InstanceId24,
              RD.Id stateId33
INTO #TempGetFullProgramSelectionInfo            
FROM    unicas_config..applicationForm AF  
  INNER JOIN UNICAS_CONFIG.. AcademicInstitution AI
           ON AF.casid=AI.casid 
  INNER JOIN UNICAS_CONFIG..Organization O 
           ON O.academicInstitutionid=AI.id   
  INNER JOIN UNICAS_CONFIG..AssociationOrg asOrg
           ON asOrg.FormId=AF.id
  INNER JOIN  UNICAS_CONFIG..Program P
           ON P.AssociationOrgId=asOrg.Id and asOrg.OrganizationId=O.id AND AF.Id = 6286
  INNER JOIN  unicas_config..ReferenceData RD 
                 ON P.STATE = RD.ValueId AND RD.ValueAbbr ='US'
  INNER JOIN  unicas_config..ReferenceDataSet RS  
           ON RD.ReferenceSetId = RS.SetId AND RS.NAME = 'LK_States'

现在，如果我拆分为 2 个查询

select RD.ValueId, RD.id into #temp1
from   unicas_config..ReferenceData RD
INNER JOIN  unicas_config..ReferenceDataSet RS   ON RD.ReferenceSetId= RS.SetId AND RS.NAME= 'LK_States'
where RD.ValueAbbr='US';


SELECT        P.Id id0,
              P.ProgramId ProgramId1,
              P.ProgramName ProgramName2,
              P.ProgramLevel ProgramLevel3,
              P.Department Department4,
              P.Track Track5,
              P.AcademicYear AcademicYear6,
              P.StartTerm StartTerm7,
              P.Delivery Delivery8,
              P.Fee Fee9,
              P.City City10,
              P.STATE State11,
              P.StartDate StartDate12,
              P.Deadline Deadline13,
              P.DeadlineDisplay DeadlineDisplay14,
              P.ProgramType ProgramType15,
              O.Id as OrganizationId16,
              O.NAME OrganizationName17,
              P.ApplicationType ApplicationType18,
              P.Concentration Concentration19,
              P.ZipCode ZipCode20,
              P.Campus Campus21,
              P.WADisplayName WADisplayName22,
              P.UpdatedDate updateDate23,
              AF.Id InstanceId24,
              RD.Id stateId33
INTO #TempGetFullProgramSelectionInfo            
FROM    unicas_config..applicationForm AF  
  INNER JOIN UNICAS_CONFIG.. AcademicInstitution AI
           ON AF.casid=AI.casid 
  INNER JOIN UNICAS_CONFIG..Organization O 
           ON O.academicInstitutionid=AI.id   
  INNER JOIN UNICAS_CONFIG..AssociationOrg asOrg
           ON asOrg.FormId=AF.id
  INNER JOIN  UNICAS_CONFIG..Program P
           ON P.AssociationOrgId=asOrg.Id and asOrg.OrganizationId=O.id AND AF.Id = 6286
  INNER JOIN    #temp1 RD ON P.STATE= RD.ValueId;

使用 Frisbee 推荐的查询

使用哈希连接

Answer 1

尝试一下
您有一些（可能）放错位置的连接条件

SELECT        P.Id id0,
              P.ProgramId ProgramId1,
              P.ProgramName ProgramName2,
              P.ProgramLevel ProgramLevel3,
              P.Department Department4,
              P.Track Track5,
              P.AcademicYear AcademicYear6,
              P.StartTerm StartTerm7,
              P.Delivery Delivery8,
              P.Fee Fee9,
              P.City City10,
              P.STATE State11,
              P.StartDate StartDate12,
              P.Deadline Deadline13,
              P.DeadlineDisplay DeadlineDisplay14,
              P.ProgramType ProgramType15,
              O.Id as OrganizationId16,
              O.NAME OrganizationName17,
              P.ApplicationType ApplicationType18,
              P.Concentration Concentration19,
              P.ZipCode ZipCode20,
              P.Campus Campus21,
              P.WADisplayName WADisplayName22,
              P.UpdatedDate updateDate23,
              AF.Id InstanceId24,
              RD.Id stateId33
INTO #TempGetFullProgramSelectionInfo            
FROM       UNICAS_CONFIG..Organization O                 
INNER JOIN UNICAS_CONFIG..AcademicInstitution AI
            ON AI.id = O.academicInstitutionid        
INNER JOIN unicas_config..applicationForm AF
            ON AF.casid = AI.casid  
           AND AF.Id = 6286   
INNER JOIN UNICAS_CONFIG..AssociationOrg asOrg
            ON asOrg.FormId         = AF.id
           and asOrg.OrganizationId = O.id
INNER JOIN UNICAS_CONFIG..Program P
            ON P.AssociationOrgId = asOrg.Id 
INNER JOIN unicas_config..ReferenceData RD 
            ON RD.ValueId = P.STATE  
           AND RD.ValueAbbr ='US'
INNER JOIN unicas_config..ReferenceDataSet RS  
            ON RS.SetId = RD.ReferenceSetId   
           AND RS.NAME = 'LK_States'

如果 #temp 有索引，则对最有意义的索引进行排序

如果这不能改善响应，那么只需对所有内容强制进行哈希连接
仍然使用我的答案中的选择 - 将哈希添加到上面的查询中

INNER HASH JOIN