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Using concat & substr

 
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prog_mario
Beginner


Joined: 08 Sep 2007
Posts: 86
Topics: 27
PostPosted: Mon Dec 05, 2011 7:44 am    Post subject: Using concat & substr Reply with quote
I need to run a query like this:
Code:

Select tab_number
         ,tab_name
from tab
where date(tab_timestamp) >= tab_rec_date;

In this situation tab_rec_date is length of 8 bytes (YYYYMMDD) and
date(tab_timestamp) is length of 10 bytes (YYYY-MM-DD).

I tried to do this
Code:

where date(tab_timestamp) >= substr(tab_rec_date,1,4) ||
                                              substr(tab_rec_date,5,2) ||
                                              substr(tab_rec_date,7,2)

But I got an error msg:
Code:

DSNT408I SQLCODE = -104, ERROR:  ILLEGAL SYMBOL "(". SOME SYMBOLS THAT MIGHT
         BE LEGAL ARE: , FROM INTO                                           
DSNT418I SQLSTATE   = 42601 SQLSTATE RETURN CODE                             
DSNT415I SQLERRP    = DSNHPARS SQL PROCEDURE DETECTING ERROR                 
DSNT416I SQLERRD    = 502 0  0  -1  599  0 SQL DIAGNOSTIC INFORMATION       
DSNT416I SQLERRD    = X'000001F6'  X'00000000'  X'00000000'  X'FFFFFFFF'     
         X'00000257'  X'00000000' SQL DIAGNOSTIC INFORMATION                 

Can someone help me?

thanks a lot
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NASCAR9
Intermediate


Joined: 08 Oct 2004
Posts: 274
Topics: 52
Location: California
PostPosted: Mon Dec 05, 2011 11:00 am    Post subject: Reply with quote
Try this(I did not test)
Code:

where date(tab_timestamp) >=
DATE(substr(tab_rec_date,1,4) || '-' ||
substr(tab_rec_date,5,2) || '-' ||
substr(tab_rec_date,7,2) )

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kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12375
Topics: 75
Location: San Jose
PostPosted: Mon Dec 05, 2011 12:03 pm    Post subject: Reply with quote
prog_mario,

I am assuming you did not show us the complete SQL as your error messages indicate you have an error on the INTO statement.

Either way your comparison is flipped. Shouldn't you be using the substr on tab_timestamp? or you need to concatenate the '-' to the tab_rec_date like nascar has shown.

Here is an alternative way of comparing (Untested )

Code:

WHERE REPLACE(DATE(tab_timestamp),'-','') >= tab_rec_date;


Modified sql from this topic

http://www.mvsforums.com/helpboards/viewtopic.php?t=11000&highlight=replace

Kolusu
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