SQL中join的用法解析(inner join、full out join、left join)

话很少说,先上个对于各类join状况的总结图: web 例若有以下关系的数据: svg 一、inner join3d select * from Table_a join Table_b on Table_a.id_a = Table_b.id_b 2.一、full outer join等于full joincode select * from Table_a full join Table_b
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