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Query on SQL


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abdulrafi

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Joined: 14 Sep 2009
Posts: 184
Location: Coimbatore

PostPosted: Fri Mar 27, 2015 12:21 pm
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Hi,

I have an issue while comapring account number column in CHARACTER format with that of an account number column in INTEGER format(leading zeros are suppressed) via SQL.

The account numbers are not picked correctly.

(eg. 01234567 or 00123456 etc.,). Thease are some account numbers when comparsion its not working.

Please help me on what modification should I do so that the comparison works perfectly in SQL between CHARACTER and INTEGER.
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abdulrafi

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Joined: 14 Sep 2009
Posts: 184
Location: Coimbatore

PostPosted: Fri Mar 27, 2015 12:52 pm
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I tried with the below statement but its not working,

SUBSTR(A.ACCOUNT_NUMBER,7,8)=CHAR(B.ACCOUNT_NO).

scenario:
Account number 00123456 (which is of CHAR definition) is not macthing with 123456 (which is of INT definition) with that of the other table.

I cannot determine position using substr as it changes. So is there a way out to supress the zeros and check it in SQL.
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chandan.inst

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Joined: 03 Nov 2005
Posts: 275
Location: Mumbai

PostPosted: Fri Mar 27, 2015 4:26 pm
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Hi,

Use CAST function to convert Character column to Integer and then use for comparison

Regards,
Chandan
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abdulrafi

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Joined: 14 Sep 2009
Posts: 184
Location: Coimbatore

PostPosted: Thu May 07, 2015 1:01 pm
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For optimization, CAST does not work. It takes more time. So can we any other option to comparison. I used TRIM . even then it takes more time.
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enrico-sorichetti

Senior Moderator


Joined: 14 Mar 2007
Posts: 10712
Location: italy

PostPosted: Thu May 07, 2015 1:23 pm
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You have a poor setup, so just forget about any optimisation.
You will have to live with what You will get as long as it provides the proper result.
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GuyC

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Joined: 11 Aug 2009
Posts: 1281
Location: Belgium

PostPosted: Fri May 08, 2015 3:26 pm
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DB2 luw : trim(leading '0' from MyCharColumn)
or
DB2 zOS : LTRIM(MyCharColumn, '0'),
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