（转）join, inner join, left join, right join, full join的差别
（转）join, inner join, leftjoin, right join, full join的区别inner join可以简写为join?ON TESTA.ATEST
（转）join, inner join, left join, right join, full join的区别
inner join可以简写为join
?
ON TESTA.A=TESTB.A
?
“(+)”所在位置的另一侧为连接的方向
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