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![图解SQL的inner join、left join、right join、full outer join、union、union all的区别1.INNER JOIN2.FULL [OUTER] JOIN3.left[outer] join4.RIGHT [OUTER] JOIN5.UNION 与 UNION ALL[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)
