MySQL full join的实现
因为MySQL不支持FULL JOIN
,下面是替代方法
left join + union(可去除重复数据)+ right join
select * from A left join B on A.id = B.id (where 条件)
union
select * from B left join A on A.id = B.id (where条件);
MySQL full join的实现
因为MySQL不支持FULL JOIN
,下面是替代方法
left join + union(可去除重复数据)+ right join
select * from A left join B on A.id = B.id (where 条件)
union
select * from B left join A on A.id = B.id (where条件);