sql - how to remove duplicate rows -


i have following query retrieve bunch of data somehow creates duplicate rows records.i tried distinct no use

what doing wrong here

  select distinct dbo.tblassessmentecosystemcredit.managementzoneid, assessmentecosystemcreditid,dbo.tblassessmentecosystemcredit.assessmentversionid ,  (coalesce(dbo.tblmanagementzone.sitevaluecurrentscore,0)  -coalesce(dbo.tblmanagementzone.sitevaluefuturescore,0)) lossinsitevaluescore,  5 savetype, dbo.ufn_varbintohexstr(dbo.tblassessmentecosystemcredit.rowtimestamp) rowtimestamp,  dbo.tblvegetationzone.eecid,  case when dbo.tblvegetationzone.eecid > 0 3.0  else 1.0  end eecoffsetmultiplier  dbo.tblassessmentecosystemcredit  inner join dbo.tblvegetationtype  on dbo.tblassessmentecosystemcredit.vegtypeid = dbo.tblvegetationtype.vegtypeid  inner join dbo.tblmanagementzone  on dbo.tblassessmentecosystemcredit.managementzoneid = dbo.tblmanagementzone.managementzoneid  inner join dbo.tblvegetationzone  on dbo.tblvegetationzone.vegetationzoneid = dbo.tblmanagementzone.vegetationzoneid  inner join dbo.tblassessmentversion av on  av.assessmentversionid = dbo.tblassessmentecosystemcredit.assessmentversionid  inner join tblassessment tba on  tba.assessmentid = av.assessmentid  dbo.tblassessmentecosystemcredit.assessmentversionid= @assessmentversionid

possibly have duplicate rows in central base table, dbo.tblassessmentecosystemcredit. should easy check, know rows at.

more likely, obtaining multiple result rows corresponding few of dbo.tblassessmentecosystemcredit rows because 1 of tables joining has multiple matches rows. is, 1 of these columns contains @ least 1 duplicated value:

dbo.tblvegetationtype.vegtypeid  dbo.tblmanagementzone.managementzoneid  dbo.tblvegetationzone.vegetationzoneid dbo.tblassessmentversion.assessmentversionid tblassessment.assessmentid

the responsible column must not subject single-column unique constraint, , must not single-column primary key table, may narrow down. note whole row not need duplicated, id.


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