Hi all.
I have to write an app that interacts with mySQL (I really must have done
some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the database and
the current date. "No problem," thought I , "I'll just use the SQL DATEDIFF
command." Heh! Well, the user interface I'm using didn't even recognise
DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to use it,
only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't. 6  16510 
Since date values are just doubles in disguise, you can do simple arithmetic
on them. The difference in days is just Date2 - Date1, plus one if the count
is inclusive. If the dates include time values (the decimal part) you'll
need to convert to integer first.
"Lofty" <lo***@no.spa m> wrote in message
news:Ms******** ************@wa rds.force9.net. .. Hi all.
I have to write an app that interacts with mySQL (I really must have done
some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the database
and the current date. "No problem," thought I , "I'll just use the SQL
DATEDIFF command." Heh! Well, the user interface I'm using didn't even recognise
DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to use
it, only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
Since date values are just doubles in disguise, you can do simple arithmetic
on them. The difference in days is just Date2 - Date1, plus one if the count
is inclusive. If the dates include time values (the decimal part) you'll
need to convert to integer first.
"Lofty" <lo***@no.spa m> wrote in message
news:Ms******** ************@wa rds.force9.net. .. Hi all.
I have to write an app that interacts with mySQL (I really must have done
some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the database
and the current date. "No problem," thought I , "I'll just use the SQL
DATEDIFF command." Heh! Well, the user interface I'm using didn't even recognise
DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to use
it, only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
Thanks for the response, Jezebel.
However, I tried your logic, and according to mySQL, December 1st 2003 -
October 15 2003 = -20030995062807
which doesn't make an awful lot of sense to me - it certainly isn't the
difference in days! ;-)
Has anyone else managed to get the fabled mySQL DATEDIFF function to work?
--
Lofty http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
"Jezebel" <gr****@play.ne t> wrote in message
news:ec******** ******@TK2MSFTN GP12.phx.gbl... Since date values are just doubles in disguise, you can do simple
arithmetic on them. The difference in days is just Date2 - Date1, plus one if the
count is inclusive. If the dates include time values (the decimal part) you'll
need to convert to integer first.
"Lofty" <lo***@no.spa m> wrote in message
news:Ms******** ************@wa rds.force9.net. .. Hi all.
I have to write an app that interacts with mySQL (I really must have
done some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the database
and the current date. "No problem," thought I , "I'll just use the SQL
DATEDIFF command." Heh! Well, the user interface I'm using didn't even
recognise DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to use
it, only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
Thanks for the response, Jezebel.
However, I tried your logic, and according to mySQL, December 1st 2003 -
October 15 2003 = -20030995062807
which doesn't make an awful lot of sense to me - it certainly isn't the
difference in days! ;-)
Has anyone else managed to get the fabled mySQL DATEDIFF function to work?
--
Lofty http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
"Jezebel" <gr****@play.ne t> wrote in message
news:ec******** ******@TK2MSFTN GP12.phx.gbl... Since date values are just doubles in disguise, you can do simple
arithmetic on them. The difference in days is just Date2 - Date1, plus one if the
count is inclusive. If the dates include time values (the decimal part) you'll
need to convert to integer first.
"Lofty" <lo***@no.spa m> wrote in message
news:Ms******** ************@wa rds.force9.net. .. Hi all.
I have to write an app that interacts with mySQL (I really must have
done some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the database
and the current date. "No problem," thought I , "I'll just use the SQL
DATEDIFF command." Heh! Well, the user interface I'm using didn't even
recognise DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to use
it, only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
Heh!
Well, I've ended up using
TO_DAYS(departu re_date) - TO_DAYS(CURDATE ())
which works, but seems really, really nasty!
Is there a public.mysql.su cks newsgroup anywhere? ;-)
--
Lofty http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
"Lofty" <lo***@no.spa m> wrote in message
news:1T******** ************@wa rds.force9.net. .. Thanks for the response, Jezebel.
However, I tried your logic, and according to mySQL, December 1st 2003 -
October 15 2003 = -20030995062807
which doesn't make an awful lot of sense to me - it certainly isn't the
difference in days! ;-)
Has anyone else managed to get the fabled mySQL DATEDIFF function to work?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
"Jezebel" <gr****@play.ne t> wrote in message
news:ec******** ******@TK2MSFTN GP12.phx.gbl... Since date values are just doubles in disguise, you can do simple
arithmetic on them. The difference in days is just Date2 - Date1, plus one if the
count is inclusive. If the dates include time values (the decimal part) you'll
need to convert to integer first.
"Lofty" <lo***@no.spa m> wrote in message
news:Ms******** ************@wa rds.force9.net. .. Hi all.
I have to write an app that interacts with mySQL (I really must have done some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the
database and the current date. "No problem," thought I , "I'll just use the SQL
DATEDIFF command." Heh! Well, the user interface I'm using didn't even recognise DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to
use it, only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
Heh!
Well, I've ended up using
TO_DAYS(departu re_date) - TO_DAYS(CURDATE ())
which works, but seems really, really nasty!
Is there a public.mysql.su cks newsgroup anywhere? ;-)
--
Lofty http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
"Lofty" <lo***@no.spa m> wrote in message
news:1T******** ************@wa rds.force9.net. .. Thanks for the response, Jezebel.
However, I tried your logic, and according to mySQL, December 1st 2003 -
October 15 2003 = -20030995062807
which doesn't make an awful lot of sense to me - it certainly isn't the
difference in days! ;-)
Has anyone else managed to get the fabled mySQL DATEDIFF function to work?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
"Jezebel" <gr****@play.ne t> wrote in message
news:ec******** ******@TK2MSFTN GP12.phx.gbl... Since date values are just doubles in disguise, you can do simple
arithmetic on them. The difference in days is just Date2 - Date1, plus one if the
count is inclusive. If the dates include time values (the decimal part) you'll
need to convert to integer first.
"Lofty" <lo***@no.spa m> wrote in message
news:Ms******** ************@wa rds.force9.net. .. Hi all.
I have to write an app that interacts with mySQL (I really must have done some evil, evil stuff in a previous life to be landed with this!)
I need to work out the difference in days between values in the
database and the current date. "No problem," thought I , "I'll just use the SQL
DATEDIFF command." Heh! Well, the user interface I'm using didn't even recognise DATEDIFF as being a function, so I decided to visit the mySQL website.
Their description of DATEDIFF is as follows:
------------------------
DATEDIFF(ARGUME NTS)
TIMEDIFF(ARGUME NTS)
[Rest of description to be added here]
NEED EXAMPLE
DATEDIFF() and TIMEDIFF() were added in MySQL 4.1.1.
------------------------
Wow! How helpful! I can't believe that they don't provided decent
documentation for their database server!
I had a quick Google, but couldn't find ANY pages describing how to
use it, only pages complaining about its non-existence in previous versions.
Can anyone help me here?
--
Lofty
http://www.brainache.demon.co.uk
- There are 10 types of people in this world:
Those who understand binary, and those who don't.
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