mysql 按時間段統計（年，季度，月，天，時）

按年匯總，統計：

select sum(mymoney) as totalmoney, count(*) as sheets from mytable group by date_format(col, '%Y');

按月匯總，統計：

select sum(mymoney) as totalmoney, count(*) as sheets from mytable group by date_format(col, '%Y-%m');

按季度匯總，統計：

select sum(mymoney) as totalmoney,count(*) as sheets from mytable group by concat(date_format(col, '%Y'),FLOOR((date_format(col, '%m')+2)/3));

select sum(mymoney) as totalmoney,count(*) as sheets from mytable group by concat(date_format(col, '%Y'),FLOOR((date_format(col, '%m')+2)/3));

按小時：

select sum(mymoney) as totalmoney,count(*) as sheets from mytable group by date_format(col, '%Y-%m-%d %H ');

查詢 本年度的數據:

SELECT * FROM mytable WHERE year(FROM_UNIXTIME(my_time)) = year(curdate())

查詢數據附帶季度數:

SELECT id, quarter(FROM_UNIXTIME(my_time)) FROM mytable;

查詢 本季度的數據:

SELECT * FROM mytable WHERE quarter(FROM_UNIXTIME(my_time)) = quarter(curdate());

本月統計:

select * from mytable where month(my_time1) = month(curdate()) and year(my_time2) = year(curdate())

本周統計:

select * from mytable where month(my_time1) = month(curdate()) and week(my_time2) = week(curdate())

N天內記錄:

WHERE TO_DAYS(NOW())-TO_DAYS(時間字段)<=N

本篇文章來源於 Linux公社網站(www.linuxidc.com) 原文鏈接：http://www.linuxidc.com/Linux/2012-11/74145.htm