MySQL-date time Extract function code example detailed introduction-Mysql Tutorial-php.cn

MySQL-date time Extract function code example detailed introduction

黄舟

Release： 2017-03-13 13:18:01

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MySQLDate TimeExtract The advantage of the function is that you can select various parts of the date and time, from the year all the way to microseconds. Let us use the MySQL date and time processing is easier.

MySQL date and time Extract (select) function.
1. Select various parts of date and time: date, time, year, quarter, month, day, hour, minute, second, microsecond

set @dt = &#39;2008-09-10 07:15:30.123456&#39;;  
select date(@dt); -- 2008-09-10  
select time(@dt); -- 07:15:30.123456  
select year(@dt); -- 2008  
select quarter(@dt); -- 3  
select month(@dt); -- 9  
select week(@dt); -- 36  
select day(@dt); -- 10  
select hour(@dt); -- 7  
select minute(@dt); -- 15  
select second(@dt); -- 30  
select microsecond(@dt); -- 123456

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2. MySQL Extract() function can be implemented above Similar functions

set @dt = &#39;2008-09-10 07:15:30.123456&#39;;  
select extract(year from @dt); -- 2008  
select extract(quarter from @dt); -- 3  
select extract(month from @dt); -- 9  
select extract(week from @dt); -- 36  
select extract(day from @dt); -- 10  
select extract(hour from @dt); -- 7  
select extract(minute from @dt); -- 15  
select extract(second from @dt); -- 30  
select extract(microsecond from @dt); -- 123456  
 
select extract(year_month from @dt); -- 200809  
select extract(day_hour from @dt); -- 1007  
select extract(day_minute from @dt); -- 100715  
select extract(day_second from @dt); -- 10071530  
select extract(day_microsecond from @dt); -- 10071530123456  
select extract(hour_minute from @dt); -- 715  
select extract(hour_second from @dt); -- 71530  
select extract(hour_microsecond from @dt); -- 71530123456  
select extract(minute_second from @dt); -- 1530  
select extract(minute_microsecond from @dt); -- 1530123456  
select extract(second_microsecond from @dt); -- 30123456

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MySQL Extract() function has all the other functions except date() and time(). It also has functions such as selecting ‘day_microsecond’. Note that instead of just selecting day and microsecond, you select from the day part of the date all the way to the microsecond part.

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