Date format conversion in SQL statements in Mysql (DATE_FORMAT() articles)

        In view of the fact that the conversion of the date format is often used to provide the front-end with the correct time display format, there are many formatting methods, such as the Java method, as follows:

   Date date = new Date();
   SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
   String dateString = formatter.format(date);

But when we encounter multiple fields, this method will undoubtedly redundant a lot of codes. It is a better solution to choose to format the date format when querying in SQL.

Let’s talk about the date_format() function today. The specific usage is as follows:

date_format(): Function used in mysql to display various formats of time\date

Format: DATE_FORMAT(date, format) date: date format: format

Example:

SELECT DATE_FORMAT(SYSDATE(),'%Y-%m-%d %H:%i%s') from dual;

 

Detailed format format:

Format	describe
%a	abbreviated day of the week
%b	abbreviated month name
%c	month, value
%D	day of month with english prefix
%d	Day of the month, value (00-31)
%e	Day of the month, value (0-31)
%f	microsecond
%H	hour (00-23)
%h	hour (01-12)
%I	hour (01-12)
%i	minute, value (00-59)
%j	Day of the year (001-366)
%k	hour(0-23)
%l	hours (1-12)
%M	month name
%m	month, value (00-12)
%p	AM or PM
%r	Time, 12-hour (hh:mm:ss AM or PM)
%S	seconds (00-59)
%s	seconds (00-59)
%T	Time, 24-hour (hh:mm:ss)
%U	Week (00-53) Sunday is the first day of the week
%u	Week (00-53) Monday is the first day of the week
%V	Week (01-53) Sunday is the first day of the week, used with %X
%v	Week (01-53) Monday is the first day of the week, use with %x
%W	week name
%w	Day of the week (0=Sunday, 6=Saturday)
%X	Year, where Sunday is the first day of the week, 4 digits, used with %V
%x	Year, where Monday is the first day of the week, 4 digits, used with %v
%Y	year, 4 digits
%y	year, 2 digits

​The above is a basic detailed explanation of the usage of this function! ! !