RE: SQL Date Math

["Wilt, Charles" <WiltC@xxxxxxxxxx>]

Don,

Basically yes.

Why are you not using "(curdate() - 1 YEAR)"?

Charles

> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx 
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Don Cavaiani
> Sent: Friday, November 16, 2007 1:51 PM
> To: Midrange Systems Technical Discussion
> Subject: RE: SQL Date Math
>
> Elvis, does it have to go on EACH element of the date (as below)?
>
> select * from bpcs405cdf/frt                                   
> where Dec( digits(Dec(year(curdate() - 365 days),4,0)) ||      
>           digits(Dec(month(curdate() - 365 days),2,0)) ||
>
>           digits(Dec(day(curdate() - 365 days),2,0)) ) < refdt  
>
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Elvis Budimlic
> Sent: Friday, November 16, 2007 11:37 AM
> To: 'Midrange Systems Technical Discussion'
> Subject: RE: SQL Date Math
>
> Don, 
>
> DB2 supports date arithmetic so something like CURDATE() - 30 
> DAYS ought
> to work in your case. 
>
> Fact that you're using CURDATE built-in versus CURRENT_DATE special
> register saves you from cross-midnight considerations as DB2 reads
> time-of-day clock once per statement execution, which is exactly what
> you want.
>
> Elvis
>
> Celebrating 10-Years of SQL Performance Excellence on IBM i5/OS and
> OS/400 http://centerfieldtechnology.com/training.asp
>  
>
> -----Original Message-----
> Subject: RE: SQL Date Math
>
> Jim,
>
> I'm liking method 2, and got it to work.  Thanks!  Now, how would I go
> about adjusting the curdate - say to subtract 30 days from it before
> using it in the comparison?
>
> Don 
>
> -----Original Message-----
> Subject: Re: SQL Date Math
>
> Ok - hit send to early!
>
> 2nd way;
> When Dec( digits(Dec(year(curdate()),4,0)) ||
>                  digits(Dec(month(curdate()),2,0)) ||
>                  digits(Dec(day(curdate()),2,0))  )  = refdta
>
> This extracts the year, month and day from current date, then 
> puts them
> back together and makes it into a number to compare with the field
> refdta.
>
> HTH
>
> Jim
>
>
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