图解SQL的inner join、left join、right join、full outer join、union、union all的区别
图解SQL的inner join、left join、right join、full outer join、union、union all的区别 假设我们有两张表。Table A 是左边的表。Table B 是右边的表。其各有四条记录，其中有两条记录name是相同的，如下所示：让我们看看不同JOIN的不同 1.INNER JOIN SELECT * FROM TableA INNER JOIN T
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