求大神，如何优化这条sql

Question

语句是这样的:

SELECT
    *
FROM
    (
        SELECT
            DAY AS times,
            ifnull(SUM(bid_request), 0) AS bid_request,
            count(*) AS winnotice,
            ifnull(SUM(budget), 0) AS budget,
            ifnull(SUM(cost), 0) AS cost
        FROM
            pmp_report_history_creative
        WHERE
            1 = 1
        AND STATUS = 1
        AND type = 0
        GROUP BY
            DAY
    ) tb1
WHERE
    tb1.times BETWEEN '2016-12-13'
AND '2016-12-19';

这样查询需要15秒左右，而且还加了索引，索引如下：

请问如何优化这条sql，谢谢:)

Answer 1

你是先把所有数据group by DAY了，然后取出指定日期的计算量当然大了

应该是先取指定日期的再group by，还有不需要嵌套，你外层就限定日期的，啥都没做，直接去掉