Can SQL lookup a value in the previous record?

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August 18th, 2004, 08:59 AM

krenders

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Can SQL lookup a value in the previous record?

Hi,
I am a newbie to DB2 SQL and need to know if it is possible with DB2 SQL to insert the value of the same field in the previous record in the field in the current record if another field is not empty? Basically my question is if it possible for SQL to lookup the value in the previous record? The previous record is the physical record just before the current record, there is not necessary a relationship between both records.
Thanks.

September 12th, 2004, 03:18 PM

ajcrock

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Ehhh?

Quote:

Originally Posted by krenders

So your saying...

record1
field1=x

record2
field1=y
field2=NULL

insert the value of record1.field1
into record2.field1
where record2.field1 AND record2.field = NULL

Is that what your tryign to say?

September 13th, 2004, 11:45 PM

bingotailspin

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You need a trigger. Look at the SQL Reference on create trigger using the INSERT flag. This will likely require a auto-increment field so you can select max to get the last record.

September 15th, 2004, 09:52 PM

fractalvibes

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It depends - tell us more about the DB structure and exactly what you are trying to accomplish in more detail.

Thinking this deals with rows in the same table and probably not an identity column?

fv

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