AW: Embedded SQL formatting dates

Converting numeric dates especially those dates in a 7 digit numeric format
with century, is one of the rare things that SQL does not handle very nicely
and that can be done easier with RPG!
If you want to use a numeric date as date, it first has to be converted
into a valid character representation of a date.

Here an example - how a 7 digit numeric date in the format CYYMMDD can be
converted into a real date with SQL:

Date(Digits(Dec(19000000 + YourDateCYMD, 8, 0)) concat '000000')


Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"


-----Ursprüngliche Nachricht-----
Von: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] Im Auftrag von Booth
Martin
Gesendet: Friday, 01.1 2016 18:14
An: RPG programming on the IBM i (AS/400 and iSeries)
Betreff: Re: AW: Embedded SQL formatting dates

I have said the question badly. I understand that a date field knows what
it is; I do not to tell it. But it does need to know what is being fed into
it. That is the place I am at with this issue.

I have a field in a data file which is 7/0 and is cyymmdd. I want to
use it as a date field so I can get the week. Presently that is being done
by substringing the digits and replacing the leading "1" with a "20". That
seems cumbersome to me but maybe thats the only way to do it?

On 1/1/2016 10:58 AM, Birgitta Hauser wrote:

SQL does not care about date formats. A date is only a numeric value
and date formats are only used to make this scaliger no readable.
If you debug your code and fetch any date value into a date field. The
format of the date that is displayed depends on the date format of the
RPG variable.
If you want to convert or display the date into any other format, it
has to be converted into a character version, by using one of the
scalar functions
CHAR() or VARCHAR_FORMAT().

Example:
Exec SQL Values(Char(Current_Date, USA),
VarChar_Format(Current_Date, 'MM/DD/YY'),
VarChar_Format(Current_Date, 'MMDDYYYY'))
into :HostDateMMDDYYYY, :HostDateMMDDYY;

If you need to convert a date into a numeric representation in the
format YYYYMMDD, this can be done since release 7.2 with one of the
scalar functions DEC(), Integer() or BigInt():

Example:
Exec SQL Values(Dec(Current_Date, 8, 0),
Int(Current_Date),
BigInt(Current_Date))
Into :HostDateDec, :HostDateInt, :HostDateBigInt;

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars."
(Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training
them and keeping them!"

-----Ursprüngliche Nachricht-----
Von: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] Im Auftrag von
Booth Martin
Gesendet: Thursday, 31.12 2015 20:48
An: RPG programming on the IBM i / System i
Betreff: Embedded SQL formatting dates

Birgitta tantalized me a bit ago. SQL does so much so well.

So far I have not found a way to set the output format for a date.
This does not work:

exec sql select date(:WRKDAT)
into :MDYYDATE "mm-dd-yyyy" from SYSIBM/SYSDUMMY1;

(As an aside, it seems to need SYSIBM/SYSDUMMY1. At least I am #1, eh?
Or does that mean something else?)
--
This is the RPG programming on the IBM i (AS/400 and iSeries)
(RPG400-L) mailing list To post a message email: RPG400-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx Before posting, please take a
moment to review the archives at http://archive.midrange.com/rpg400-l.

--
This is the RPG programming on the IBM i (AS/400 and iSeries) (RPG400-L)
mailing list To post a message email: RPG400-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives at
http://archive.midrange.com/rpg400-l.