如何在MySQL中按SUM()排序?
我有一张桌子:“ ID名称c_counts f_counts”
我想按顺序排序所有记录,sum(c_counts+f_counts)
但这不起作用:
SELECT * FROM table ORDER BY sum(c_counts+f_counts) LIMIT 20;
回答:
别忘了,如果要混合使用分组(即SUM)字段和非分组字段,则需要对非分组字段之一进行GROUP BY。
尝试这个:
SELECT SUM(something) AS fieldnameFROM tablename
ORDER BY fieldname
或这个:
SELECT Field1, SUM(something) AS Field2FROM tablename
GROUP BY Field1
ORDER BY Field2
而且,您始终可以执行以下派生查询:
SELECT f1, f2
FROM
(
SELECT SUM(x+y) as f1, foo as F2
FROM tablename
GROUP BY f2
) as table1
ORDER BY
f1
许多可能性!
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