mysql怎么算季度 mysql 按季度分组( 二 )


month(curdate()) and week(booking_time) = week(curdate())
四、时间段
N天内记录
WHERE TO_DAYS(NOW()) - TO_DAYS(时间字段) = N
当天的记录
where date(时间字段)=date(now())

where to_days(时间字段) = to_days(now());
查询一周:
select * from tablewhere DATE_SUB(CURDATE(), INTERVAL 7 DAY) = date(column_time);
查询一个月:
select * from table where DATE_SUB(CURDATE(), INTERVAL INTERVAL 1 MONTH) = date(column_time);
查询'06-03'到'07-08'这个时间段内所有过生日的会员:
Select * From user Where
DATE_FORMAT(birthday,'%m-%d') = '06-03' and DATE_FORMAT(birthday,'%m-%d')
= '07-08';
统计一季度数据mysql怎么算季度,表时间字段为:savetime
group by concat(date_format(savetime, '%Y '),FLOOR((date_format(savetime, '%m ')+2)/3))

select YEAR(savetime)*10+((MONTH(savetime)-1) DIV 3) +1,count(*)
from yourTable
group by YEAR(savetime)*10+((MONTH(savetime)-1) DIV 3) +1;
五、分组查询
1、年度分组
2、月度分组
3、先按年度分组,再按月度分组
4、按年月分组
SELECT count(ArticleId), date_format(FROM_UNIXTIME( `BlogCreateTime`),'%y%m') sdateFROM `blog_article` group by sdate
结果:
count( ArticleId )sdate
170901
110902
50903
60904
20905
10907
120908
60909
110910
30911
请问mysql的sql中如何计算两个datetime的差,精确到小时,谢谢TIMESTAMPDIFF(interval,datetime_expr1,datetime_expr2)
返回日期或日期时间表达式datetime_expr1 和datetime_expr2the 之间的整数差 。
其结果的单位由interval 参数给出 。该参数必须是以下值的其中一个:
FRAC_SECOND 表示间隔是毫秒
SECOND秒
MINUTE分钟
HOUR小时
DAY天
WEEK星期
MONTH月
QUARTER季度
YEAR年
SELECT '年'AS`日期部分`,TIMESTAMPDIFF(YEAR, '2012-12-21',CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '季度'AS`日期部分`,TIMESTAMPDIFF(QUARTER, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '月'AS`日期部分`,TIMESTAMPDIFF(MONTH, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '日'AS`日期部分`,TIMESTAMPDIFF(DAY, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '周'AS`日期部分`,TIMESTAMPDIFF(WEEK, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '时'AS`日期部分`,TIMESTAMPDIFF(HOUR, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '分'AS`日期部分`,TIMESTAMPDIFF(MINUTE, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
UNION ALL
SELECT '秒'AS`日期部分`,TIMESTAMPDIFF(SECOND, '2012-12-21', CURRENT_TIMESTAMP()) AS `数值`
;
+----------+----------+
| 日期部分 | 数值|
+----------+----------+
| 年|1 |
| 季度|4 |
| 月|12 |
| 日|388 |
| 周|55 |
| 时|9328 |
| 分|559737 |
| 秒| 33584279 |
+----------+----------+
8 rows in set (0.00 sec)
mysql select CURRENT_TIMESTAMP();
+---------------------+
| CURRENT_TIMESTAMP() |
+---------------------+
| 2014-01-13 16:58:17 |
+---------------------+
1 row in set (0.00 sec)
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