mysql不支持full join,hive支持。
全连接
mysql的full join可以通过以下方式实现:
select * from a left join on a.useid = b.userid
union
select * from a right join on a.useid = b.userid
mysql不支持full join,hive支持。
mysql的full join可以通过以下方式实现:
select * from a left join on a.useid = b.userid
union
select * from a right join on a.useid = b.userid
本文标题:full join的实现
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