sql - 如何在 postgresql 中对同一数据使用多列 IN 子句？

Question

我有这样的查询:

SELECT c1 from t WHERE c2 IN list1 AND c3 IN list1;

我想结合这个查询得到这样的东西:

SELECT c1 from t WHERE c2 AND c3 IN list1;

Answer 1

您可以使用数组和 the operator <@ (is contained by) ，例如:

with my_table(name1, name2) as (
values ('Emily', 'Bob'), ('Ben', 'Jack'), ('Emily', 'James')
)

select *
from my_table
where array[name1, name2] <@ array['Emily', 'Jack', 'James', 'Chloe'];

 name1 | name2 
-------+-------
 Emily | James
(1 row)

另请参阅:How to use same list twice in WHERE clause?