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mysql 如何匹配多个 like 条件?

有一个tag表:

id tag
1 a,b,c
2 a,c,d
3 a

请问如何查询 tag 里包含 a 和 c 的? 也就是第一行和第二行


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MySQL

SELECT * from tag_table where  FIND_IN_SET('a',tag)>0  and FIND_IN_SET('c',tag)>0;

PostgreSQL

SELECT * from tag_table where 'a' = ANY(STRING_TO_ARRAY(tag, ','))  and 'c'= ANY(STRING_TO_ARRAY(tag, ','));

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