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我有一张表格,里面填写了销售汽车的数据。MySQL数据汇总平均值失败
我想得到每日平均数,所以我使用聚合和下面的函数。
SELECT
DAYOFMONTH(TIMESTAMP) AS DAY,
MONTH(TIMESTAMP) AS MONTH,
AVG(number_sold) AS sold,
AVG(amount_earned) AS earned,
AVG(wages_spent) AS wages
FROM cardata
GROUP BY DAYOFMONTH(TIMESTAMP)
ORDER BY TIMESTAMP DESC
LIMIT 0, 12;
我应该得到12行,每天有1行。 12行返回,但每天都会出现问题。 2月份我只获得第5天和第8天。
我的陈述有问题吗?
请帮忙吗?
嘿感谢团体修复它,没有意识到我可以做到这一点 –