如何在WHERE子句中两次使用相同的列表? [英] How to use same list twice in WHERE clause?

问题描述

我的SQL查询包含一个WHERE子句，如下所示:

My SQL query contains a WHERE clause looking like this:

WHERE 
      name1 in ('Emily', 'Jack', 'James', 'Chloe') 
   OR name2 in ('Emily', 'Jack', 'James', 'Chloe')

请注意，同一列表出现了两次，这非常不令人满意(我的真实列表实际上更长).

Note that the same list appears twice, which is quite unsatisfying (and my real list is actually longer).

编写此查询的更好方法是什么?

What would be a better way to write this query?

推荐答案

您可以使用数组和重叠运算符&& ，例如:

You can use arrays and overlap operator &&, e.g.:

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

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

 name1 | name2 
-------+-------
 Emily | Bob
 Ben   | Jack
(2 rows)

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