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搬砖时遇到一个sql需要合并行 且 合并 列字段 显示的要求，好像是第一次写，记录一下。
SELECT
b.push_id AS pushId,
b.push_time AS pushTime,
c.real_name AS recivePerson,
a.school_name AS school,
a.real_name AS studentName,
a.eng_name AS studentEngName,
a.class_name AS classess,
a.area AS passArea,
a.pass_type AS passResult,
a.pass_url AS passPicture,
a.pass_time AS passTime,
GROUP_CONCAT( CONCAT(a.real_name,'(',c.push_state,')') )
FROM
pass_record a,
push_record b,
push_record_msg c
WHERE
a.record_id = b.record_id
AND b.push_id = c.push_id
GROUP BY
pushId
其中，CONCAT(clounm a,clounm b,...) 表示合并列字段显示（拼接字符）；
GROUP_CONCAT 要和GROUP BY 联合使用才有效