SELECT username count FROM passenger WHERE rightcardnum1 = 8 GROUP BY username 修改成查询每个账号所关联的旅客分别有多少个手机尾号为8的; 并按照数量从高到底进行排序查询结果显示 账号 尾号8的个数
SELECT username, COUNT(*) AS count FROM passenger WHERE RIGHT(cardnum, 1) = '8' GROUP BY username ORDER BY count DESC;
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