連表查詢能夠跟多個條件

連表查詢時後麪條件能夠跟多個條件 select * from tabA a,tabB b where a.userID=b.userID and a.userName=b.userName select * from tabA a left join tabB b on a.userID=b.userID and a.userName=b.userName where …… 連表查詢時on後面能

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