mysql - WHERE 中的 SQL GROUP_CONCAT 别名

Question

这是我的sql语句:

SELECT 
    tA.a1, GROUP_CONCAT(tB.b2) AS b2
FROM
    tableA tA
        LEFT JOIN
    tableB tB ON tA.a2 = tB.b1
WHERE
    CONCAT(tA.a1, b2) LIKE '%somestring%'
GROUP BY tA.a1;

我收到一条 sql 错误，提示类似“WHERE 中的未知列名 b2”。

Answer 1

SELECT 
    tA.a1, GROUP_CONCAT(tB.b2) AS b2
FROM
    tableA tA
        LEFT JOIN
    tableB tB ON tA.a2 = tB.b1
GROUP BY tA.a1
HAVING
    CONCAT(tA.a1, b2) LIKE '%somestring%';