From in MySQL_ Unixtime and UNIX_ Timestamp processing database timestamp conversion - Case

MySQL Data sheet design in progress , Time fields are generally designed in timestamp format , It is a little inconvenient for developers to check . have access to FROM_UNIXTIME Convert to date format for viewing

If it is in date format , To convert to timestamp view , Only need to FROM_UNIXTIME Switch to UNIX_TIMESTAMP that will do

Case a  

SELECT *,FROM_UNIXTIME(create_time) AS DATETIME FROM ebk_cls_io_log;

Case 2  

select  from_unixtime(at2.payTime, '%Y-%m-%d'), sum(at2.amount) from alipay_trade at2 group by from_unixtime(at2.payTime, '%Y-%m-%d');

 

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Summary  

1、 Time to time stamp
Get the current timestamp （ second ）

select unix_timestamp();
 result ：1599665897

Get the date timestamp in the specified format

select unix_timestamp('2020-9-9');
 result ：1599580800

Get the timestamp of the specified format date and timestamp

select unix_timestamp('2020-9-9 23:49:20');
 result ：1599666560

2、 Time stamp to time
grammar ：FROM_UNIXTIME(unix_timestamp,format)
Time stamp （unix_timestamp） by 10 position

select from_unixtime(1599666560,'%Y-%m-%d %H:%i:%S');
 result ：2020-09-09 23:49:20

Format	describe	Example	Running results
%a	English abbreviation week name	SELECT FROM_UNIXTIME(1599666560,’%a’);	Tue
%b	English abbreviation month name	SELECT FROM_UNIXTIME( Now( ), ‘%b’ )	Sep
%c	month , The number	SELECT FROM_UNIXTIME( Now( ), ‘%c’ )	9
%D	The day of the month with English prefix	SELECT FROM_UNIXTIME( Now( ), ‘%D’ )	9th
%d	Day of the month , The number (00-31)	SELECT FROM_UNIXTIME( Now( ), '%d ’ )	09
%e	Day of the month , The number (0-31)	SELECT FROM_UNIXTIME( Now( ), '%e ’ )	9
%f	Microsecond	SELECT FROM_UNIXTIME(1599666560 , '%f ’ )	000000
%H	Hours (00-23)	SELECT FROM_UNIXTIME(1599666560 , '%H ’ )	23
%h	Hours (01-12)	SELECT FROM_UNIXTIME(1599666560 , '%h ’ )	11
%I	Hours (01-12)	SELECT FROM_UNIXTIME(1599666560, ‘%I’ )	11
%i	minute , The number (00-59)	SELECT FROM_UNIXTIME(1599666560, ‘%i’ )	49
%j	Days of (001-366)	SELECT FROM_UNIXTIME(1599666560, ‘%j’ )	253
%k	Hours (0-23)	SELECT FROM_UNIXTIME(1599666560, ‘%k’ )	23
%l	Hours (1-12)	SELECT FROM_UNIXTIME(1599666560, ‘%l’ )	11
%M	month , english	SELECT FROM_UNIXTIME(1599666560, ‘%M’ )	September
%m	month , The number (00-12)	SELECT FROM_UNIXTIME(1599666560, ‘%m’ )	09
%p	In the afternoon	SELECT FROM_UNIXTIME(1599666560, ‘%p’ )	PM
%r	Time ,12- Hours （hh:mm:ss AM or PM）	SELECT FROM_UNIXTIME(1599666560, ‘%r’ )	11:49:20 PM
%S	second (00-59)	SELECT FROM_UNIXTIME(1599666560, ‘%S’ )	20
%s	second (00-59)	SELECT FROM_UNIXTIME(1599666560, ‘%s’ )	20
%T	Time , 24- Hours (hh:mm:ss)	SELECT FROM_UNIXTIME(1599666560, ‘%T’ )	23:49:20
%U	Zhou (00-53) Sunday is the first day of the week	SELECT FROM_UNIXTIME(1599666560, ‘%U’ )	36
%u	Zhou (00-53) Monday is the first day of the week	SELECT FROM_UNIXTIME(1599666560, ‘%u’ )	37
%V	Zhou (01-53) Sunday is the first day of the week , And %X Use	SELECT FROM_UNIXTIME(1599666560, ‘%V’ )	36
%v	Zhou (01-53) Monday is the first day of the week , And %x Use	SELECT FROM_UNIXTIME(1599666560, ‘%v’ )	37
%W	What day of the week , English full name	SELECT FROM_UNIXTIME(1599666560, ‘%W’ )	Wednesday
%w	Days of the week （0= Sunday , 6= Saturday ）	SELECT FROM_UNIXTIME(1599666560, ‘%w’ )	3
%X	year ,4 position , Sunday is the first day of the week , And %V Use	SELECT FROM_UNIXTIME(1599666560, ‘%X’ )	2020
%x	year ,4 position , Monday is the first day of the week , And %v Use	SELECT FROM_UNIXTIME(1599666560, ‘%x’ )	2020
%Y	year ,4 position	SELECT FROM_UNIXTIME(1599666560, ‘%Y’ )	2020
%y	year ,2 position	SELECT FROM_UNIXTIME(1599666560, ‘%y’ )	20