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  3. November 2010

RE: Difference between two time values in SQL

Oops, I forgot I have my own SECOND() function, and that's why that worked
so well. My bad. Here's a standard solution that works at V5R3:

time('00:00:00') + (midnight_seconds(endt)-midnight_seconds(strt)) second

... but that won't work when the job starts before midnight and ends after
midnight. To handle that, you could do:

time('00:00:00') +
mod(midnight_seconds(endt)+86400-midnight_seconds(strt),86400) second

I used to go here for all my SQL date/time questions:
http://www.ibm.com/developerworks/data/library/techarticle/0211yip/0211yip3.
html - and sometimes I still do.

Dennis Lovelady
http://www.linkedin.com/in/dennislovelady
--
Hard work pays off in the future. Laziness pays off now.


I think you meant.

With t1 As
(Select CURRENT_TIME a1,
CURRENT_TIME + 2 Hours + 63 minute a2
From SYSIBM/SYSDUMMY1)
Select t1.*
Time('00:00:00') + (A2 - A1)
From t1

gives

A1 A2 Time expression
16:01:54 19:04:54 03:03:00


The other gives a time of zero.

In V6R1 Sql Referance manual it starts on page 160.


On Mon, Nov 15, 2010 at 3:41 PM, Needles,Stephen J
<SNEEDLES@xxxxxxxxxxxxx>wrote:

Niiiccce Dennis.

But where did you find the answer?

I could not locate this syntax in the DB2 for i SQL Reference v6r1
manual,
which is my usual "goto" for things like this. I would like to know
the
rest of this syntax.

Steve Needles

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Dennis Lovelady
Sent: Monday, November 15, 2010 3:58 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Difference between two time values in SQL

OK, I give:

TIME('00:00:00') + (SECOND(END_TIMESTAMP) - SECOND(START_TIMESTAMP))
SECONDS

Yes, it's that easy.


Dennis Lovelady
http://www.linkedin.com/in/dennislovelady
--
"I have found the best way to give advice to your children is to find
out
what they want and then advise them to do it."
-- Harry S Truman

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of Tom E Stieger
Sent: Monday, November 15, 2010 3:04 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Difference between two time values in SQL

Why don't you just subtract them. That will give you a numeric
result
with the result being the hours difference in the first two
positions,
then the minutes, then the seconds. You can that use DIGITS,
CONCAT
and TIME functions to get it to a TIME format.

with t1 as (select current_time a1,
current_time + 2 hours + 63 minute a2
from
sysibm.sysdummy1)
select t1.*,
SUBSTRING(DIGITS(A2-A1),1,2)||':'||SUBSTRING(DIGITS(A2-
A1),3,2)||':'||SUBSTRING(DIGITS(A2-A1),5,2),
TIME(SUBSTRING(DIGITS(A2-A1),1,2)||':'||SUBSTRING(DIGITS(A2-
A1),3,2)||':'||SUBSTRING(DIGITS(A2-A1),5,2))
from t1

It's ugly, but it works.

-Tom Stieger
California Fine Wire
Engineer

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of Rick.Chevalier@xxxxxxxxxxxxxxx
Sent: Monday, November 15, 2010 9:29 AM
To: midrange-l@xxxxxxxxxxxx
Subject: Difference between two time values in SQL

When I see the answer it will probably be obvious but I have spent
over
two hours trying to create a query to list records including the
difference between two time values. I searched the archives and
did a
Google search but didn't see the answer. Lots of information on
differences between dates though.

How does one go about calculating the difference between two time
values in an SQL statement? Do they have to be converted to
timestamps
first? I want the result to be a time value as well.


Rick Chevalier
IT Software Solutions - Loan Servicing
817-525-7178 (w)



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