如何从两个表中删除与postgresql中的单个查询相同的行

Question

我有两个 tables t1 和 t2

table t1如下：

id   name
1     x
2     y
3     z

table t2如下：

id      name
1         a
121       b
131       c

在这里，我选择了 table 中常见的行，即

SELECT * 
from t1,t2 
where t1.id=t2.id;

现在我想同时删除两个 table 中 id=1 的行。我试图删除行，但我只能删除一个 table 而不是两个。谁能帮我解决这个问题。

Answer 1

你可以用 data modifying common table expression

with common_ids as (
   select id 
   from t1
   intersect
   select id 
   from t2
), t1_delete as (
   delete from t1
   where id in (select id from common_ids)
)
delete from t2
where id in (select id from common_ids);

在线示例：http://rextester.com/NAQ26877

如何从两个表中删除与postgresql中的单个查询相同的行

How to delete rows from two tables which are in common with single query in postgresql

sql

postgresql

sql-delete