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I have 4 tables in database like tbla,tblb,tblc,tbld every table cantains two columns,tbld have postelId( it is common to all tables) and postelcode columns postalid has prymary key and postalid column is fouren key of tbla,b,c tables using this postalid
how to join tbla,b,c?
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how to join tbla,b,c?
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