psql支持类似如下的递归查询吗?
with f as
(
select * from a where exists(select 1 from b where a.b=b.a)
union all
select a.* from a,f where a.b=f.a)
with f as
(
select * from a where exists(select 1 from b where a.b=b.a)
union all
select a.* from a,f where a.b=f.a)
解决方案 »
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