O'Reilly logo

MySQL Stored Procedure Programming by Steven Feuerstein, Guy Harrison

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Date and Time Functions

Date and time functions operate on MySQL date-time data types such as DATE and DATETIME.

ADDTIME

    date1=ADDTIME(date2,time_interval)

ADDTIME adds the specified time interval to the date-time provided and returns the amended date. Time intervals are specified in the format hh:mm:ss.hh, so you can add any time interval down to one-hundredth of a second.

    SET var1=NOW(  );                                 →  2005-07-21 18:56:46
    SET var2=ADDTIME(NOW(  ),"0:00:01.00");           →  2005-07-21 18:56:47
    SET var3=ADDTIME(NOW(  ),"0:01:00.00");           →  2005-07-21 18:57:46
    SET var4=ADDTIME(NOW(  ),"1:00:00.00") ;          →  2005-07-21 19:56:46

CONVERT_TZ

    datetime1=CONVERT_TZ(datetime2,fromTZ,toTZ)

This function converts a date-time value from one time zone to another. The valid time zone values can be found in the table mysql.time_zone_name.

You may have to load the MySQL time zone tables; for instructions, see the MySQL manual section "MySQL Server Time Zone Support."

CURRENT_DATE

    date=CURRENT_DATE(  )

CURRENT_DATE returns the current date. It does not show the time.

    SET var1=CURRENT_DATE(  );    →  2005-07-21

CURRENT_TIME

    time=CURRENT_TIME(  )

CURRENT_TIME returns the current time. It does not show the date.

    SET var1=CURRENT_TIME(  );    →  22:12:21

CURRENT_TIMESTAMP

    timestamp=CURRENT_TIMESTAMP(  )

CURRENT_TIMESTAMP returns the current date and time in the format yyyy-mm-dd hh:mm:ss.

    SET var1=CURRENT_TIMESTAMP(  );    →  2005-07-21 22:15:02

DATE

    date=DATE(datetime)

DATE returns the date part of a date-time value.

 SET var1=NOW( ); → 2005-07-23 ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required