select SN.cf_Name as cStage_fName, ; SN.cl_Name as cStage_lName, SN.cm_Initial as cStage_mInitial, ; NA.cf_Name, NA.cl_Name, NA.cm_Initial, NA.cNames_pk, PN.cSSN. PN.dDOB ; from Stage_Patients inner join Stage_Names SN on ... inner join Patients on ?????? inner join Names NA on Patients.cPatiens_pk = NA.cPointer_fk .....I'm a little bit concerned about joining stage and life data tables. I want to join by SSN and dDOB when both have values. Should I put this into JOIN? Or I somehow can use WHERE instead?