Oracle-L: RE: Smart Update, How ?

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Wed, 13 Mar 2002 07:48:37 -0800
Message-ID: <F001.004273BB.20020313074837@fatcity.com>

I don't understand ....

you said ... "In my cursor loop, I have an update statement, see below. Now I need to the update only for the field (in that cursor) that has data in it. (which means when is null, that field will not be updated). "

do you want to update the columns in the table, if the columns are not null? or
do you want to update the columns in the table id the RECORD attributes are not null?

To achieve problem as state in (1) you need to use dynamic SQL because you don't know which columns you will be updating.

For (2)
update my_table

set col_1 = nvl(myrec.col_1, col_1) .....

Here you will check the value in the record (rec_UpdIES) attribute, if it is null, you assign the value of the column to itself, otherwise you update it with record attribute.

Am I making it clear??

Raj

Rajendra Jamadagni MIS, ESPN Inc.
Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.

QOTD: Any clod can have facts, but having an opinion is an art!

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Author: Jamadagni, Rajendra
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Received on Wed Mar 13 2002 - 09:48:37 CST