postgres array 语法

https://www.postgresqltutorial.com/postgresql-array/

https://www.postgresql.org/docs/9.1/arrays.html

展开列表：变成多行

SELECT group_name, unnest(alias) as alias_name FROM user_table

对列表内的元素执行 like查询

SELECT * FROM (
SELECT
group_name,
unnest(alias) as alias_name
FROM
user_table
) as ag WHERE alias_name like '%ou%'