MySQL错误：操作数应包含1列

请告诉我哪里出错了。我正在like子句中使用select语句，请尝试此查询

SELECT DISTINCT s.dynamicFormId, max(s.version) FROM seralityportletpreferences s
INNER JOIN dynamicForm d on d.dynamicFormId = s.dynamicFormId
WHERE s.seralitypreferences LIKE CONCAT('%',(SELECT DISTINCT blockId, version FROM formBlock WHERE groupId = 10609 AND blockContent like '%911%'),'%')
GROUP BY d.dynamicFormId

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在

WHERE

子句中，您实际上想要实现什么？

SELECT DISTINCT s.dynamicFormId, max(s.version) FROM seralityportletpreferences s
INNER JOIN dynamicForm d on d.dynamicFormId = s.dynamicFormId
WHERE s.seralitypreferences LIKE CONCAT('%',IFNULL((SELECT DISTINCT convert(varchar(50), blockId), version FROM formBlock WHERE groupId = 10609 AND blockContent like '%911%'),''),'%')
GROUP BY d.dynamicFormId