sql的时间格式

sql中的时间格式转换主要有：date_format函数，str_to_date函数

1. 首先选择一个数据库

use db_name;

2. 显示当前时区的时间：

SELECT NOW();

3. 按照格式显示，使用 date_format 函数：

select date_format(NOW(),'%W-%Y-%m-%d') as column_name;
select date_format(NOW(),'%W-%Y-%m-%d') column_name;

 

 

 

 

 

 

 4. 格式化代码

%a	Short weekday name in current locale (Variable lc_time_names).
%b	Short form month name in current locale. For locale en_US this is one of: Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov or Dec.
%c	Month with 1 or 2 digits.
%D	Day with English suffix 'th', 'nd', 'st' or 'rd''. (1st, 2nd, 3rd...).
%d	Day with 2 digits.
%e	Day with 1 or 2 digits.
%f	Sub seconds 6 digits.
%H	Hour with 2 digits between 00-23.
%h	Hour with 2 digits between 01-12.
%I	Hour with 2 digits between 01-12.
%i	Minute with 2 digits.
%j	Day of the year (001-366)
%k	Hour with 1 digits between 0-23.
%l	Hour with 1 digits between 1-12.
%M	Full month name in current locale (Variable lc_time_names).
%m	Month with 2 digits.
%p	AM/PM according to current locale (Variable lc_time_names).
%r	Time in 12 hour format, followed by AM/PM. Short for '%I:%i:%S %p'.
%S	Seconds with 2 digits.
%s	Seconds with 2 digits.
%T	Time in 24 hour format. Short for '%H:%i:%S'.
%U	Week number (00-53), when first day of the week is Sunday.
%u	Week number (00-53), when first day of the week is Monday.
%V	Week number (01-53), when first day of the week is Sunday. Used with %X.
%v	Week number (01-53), when first day of the week is Monday. Used with %x.
%W	Full weekday name in current locale (Variable lc_time_names).
%w	Day of the week. 0 = Sunday, 6 = Saturday.
%X	Year with 4 digits when first day of the week is Sunday. Used with %V.
%x	Year with 4 digits when first day of the week is Monday. Used with %v.
%Y	Year with 4 digits.
%y	Year with 2 digits.
%#	For str_to_date(), skip all numbers.
%.	For str_to_date(), skip all punctation characters.
%@	For str_to_date(), skip all alpha characters.
%%	A literal % character.

参考：

https://www.cnblogs.com/wjm956/p/7297942.html

https://blog.csdn.net/shenliang1985/article/details/90142010

来源：https://www.cnblogs.com/qi-yuan-008/p/11878640.html