Inner Join based on column value in SQL Server 2008 -

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i join 2 tables based on column value

  • if pm.servicelevelid value 1 or null inner join on u.facilityid
  • if pm.servicelevelid value 2 inner join on u.facilityserviceid

these 2 tables pm, u have these columns:

providermessages   messageid, facilityserviceid, servicelevelid, facilityid, providertypeid  user_fa   facilityserviceid, userfacilityid, facilityid

currently, have inner join 

select distinct      messageid, userfacilityid, 9          #providermessages    inner join      #user_fa on (#user_fa.facilityid = #providermessages.facilityid or                                      #providermessages.facilityid null)              , (#user_fa.facilityserviceid = #providermessages.facilityserviceid) 

select distinct messageid, userfacilityid, 9      #providermessages     join #user_fa     on #providermessages.servicelevelid  in (null,1,2)    , (  ( #providermessages.servicelevelid  in (null,1)             , #user_fa.facilityid = #providermessages.facilityid)           or           ( providermessages.servicelevelid = 2            , #user_fa.facilityserviceid = #providermessages.facilityserviceid)        )

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