select last_day('2008-02-01'); -- 2008-02-29 select last_day('2008-08-08'); -- 2008-08-31 1. 2. MySQL last_day() 函数非常有用,比如我想得到当前月份中有多少天,可以这样来计算: mysql> select now(), day(last_day(now())) as days; +---+---+ | now() | days | +---+...
select last_day('2008-08-08'); -- 2008-08-31 MySQL last_day() 函数非常有用,比如我想得到当前月份中有多少天,可以这样来计算: mysql> select now(), day(last_day(now())) as days; +---+---+ | now() | days | +---+---+ | 2008-08-09 11:45:45 | 31 | +---+---+ 三...
6. MySQL last_day() 函数:返回月份中的最后一天。 select last_day('2008-02-01'); -- 2008-02-29 select last_day('2008-08-08'); -- 2008-08-31 MySQL last_day() 函数非常有用,比如我想得到当前月份中有多少天,可以这样来计算: mysql> select now(), day(last_day(now())) as days; +...
给定一个日期date, 返回一个天数 (从年份0开始的天数 )。 mysql> SELECT TO_DAYS(950501); -> 728779 mysql> SELECT TO_DAYS('1997-10-07'); -> 729669 TO_DAYS() 不用于阳历出现(1582)前的值,原因是当日历改变时,遗失的日期不会被考虑在内。更多信息请参见12.6节,“MySQL使用什么日历?”。 请记住,...
在MySQL中,可以使用DAY(LAST_DAY(date))函数来获取指定日期的月份天数。例如,如果要获取当前日期的月份天数,可以使用以下查询语句: SELECT DAY(LAST_DAY(NOW())) AS days_in_month; 复制代码 这将返回当前月份的天数。您可以替换NOW()为任何日期值来获取该日期对应月份的天数。 0 赞 0 踩...
FROM_DAYS() 函数不支持公历出现之前的日期(1582 年)。另外,与该函数相反的是 TO_DAYS() 函数,参见下文第 16.4 节。 FROM_UNIXTIME(unix_timestamp[,format])函数用于将 Unix 时间戳转换为日期时间,返回格式为日期时间类型的 ‘YYYY-MM-DD hh:mm:ss’ 或者整数类型的 YYYYMMDDhhmmss。例如: ...
This has been happening daily for the last 3 years. is there a way (perhaps some kind of count(*) command) to get a count of how many rows have been written to the db every day for the last 365 days. EDIT: I have a FirstCreated date that looks like this(2011-08-02 15:01:21...
import datetime import calendar # 获取当前日期 current_date = datetime.date.today() # 计算上个月的年份和月份 last_month = current_date - datetime.timedelta(days=current_date.day) last_month_year = last_month.year last_month_month = last_month.month # 计算上个月的最后一天 last_day_of_...
SELECT @lastDay := last_day( date_add(@lastDay,interval 1 month ) ) lastDays from (SELECT @lastDay := date_add(curdate(),interval -6 month) from application l...
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