Adding Days To Dates In MySQL
Written by David Walsh on Friday, April 25, 2008
One of my customers recently asked me to increment the date field on an event in their database by 14 days because their upcoming event got delayed. I knew the SQL statement would be simple and after doing some quick research, I found the magical SQL:
UPDATE events SET date_starts = DATE_ADD(date_starts,INTERVAL 14 DAY) WHERE event_id = 3;
This works on DATE and DATETIME field types. Note that it’s “14 DAY” and not “14 DAYS“.
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Nice but I use the time() function, what is better ?
@Catar: I don’t know which one is better, per say, but I know that this worked wonderfully!
it’s good!!!!…works fine and it’s usefull for me. tks!!
Nice! Wouldn’t have occurred to me that MySQL had such a feature. Personally I prefer to do all my data arithmetic in seconds before handing the result over to an SQL query, but this is worth noting.
Your blog is my Quick Bible in the Caos of Days
hi,
i’m new to sql and i’m using mysql workbench to generate data mart. i need help..i want to generate dates (e.g. 2005-01-01), day of week ( 1 to 7), day of month (1 to 31), day name and month name for the whole of year 2005. the primary key is the date_key which starts from 1 to 365 and i already upload the date key into my database. it just that i need to generate all the above attributes using update/set but i dont know what is the correct sql script to generate them automatically and accordingly. would appreciate if u could help me on this..thanks