Skip to Main Content
MySQL Stored Procedure Programming
book

MySQL Stored Procedure Programming

by Guy Harrison, Steven Feuerstein
March 2006
Intermediate to advanced content levelIntermediate to advanced
640 pages
17h 8m
English
O'Reilly Media, Inc.
Content preview from MySQL Stored Procedure Programming

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 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

MySQL Concurrency: Locking and Transactions for MySQL Developers and DBAs

MySQL Concurrency: Locking and Transactions for MySQL Developers and DBAs

Jesper Wisborg Krogh
MySQL 8 Administrator???s Guide

MySQL 8 Administrator???s Guide

Chintan Mehta, Hetal Oza, Subhash Shah, Ravi Shah
MySQL Cookbook, 4th Edition

MySQL Cookbook, 4th Edition

Sveta Smirnova, Alkin Tezuysal
Learning MySQL, 2nd Edition

Learning MySQL, 2nd Edition

Vinicius M. Grippa, Sergey Kuzmichev

Publisher Resources

ISBN: 0596100892Supplemental ContentErrata Page