Question

I run this command :

select * from LIST where JCODE = 8 and
KCODE = 01 and LCODE = 2011

and if the above retruns no rows then perform the below :

insert into LIST
select * from LIST@LNDB where JCODE = 8 and
KCODE = 01 and LCODE = 2011 and ban
in (select BAN from billing_account)

Update LIST set STS = null where JCODE = 8
AND KCODE = 01;

Update LIST set NO = '1' where JCODE = 8 AND
KCODE = 01;

moreover can i use some variable in the begininng which
sets

JCODE= somevalue
KCODE= anothervalue
LCODE=someothervalue

so that i dont have to edit every line every time i run it.
I am using :

Oracle 9i Enterprise Edition release 9.2.8.0 - 64 bit Production

Answer 1

I can’t tell for the SELECT, but you should be allowed to UPDATE several fields at once:

UPDATE LIST set STS = null , NO = '1' WHERE JCODE = 8 AND KCODE = 01;

Edit: I don’t understand why you need the second SELECT (with LIST@LNDB), but in both queries I don’t think you really need all the fields, so instead of using SELECT *, which is heavy for the system, use only and explicitly the primary key’s field name (like SELECT id FROM ...).

And there is a way to do it in one request, probably something like:

UPDATE LIST set STS = null , NO = '1' WHERE JCODE = 8 AND KCODE = 01 AND 0<(SELECT COUNT(*) FROM LIST WHERE JCODE = 8 AND KCODE = 01 AND LCODE = 2011);

This way, if there is no result found by SELECT, the WHERE clause in UPDATE will be false for every row, as 0<0 is false. There may also be a way to use COUNT() with a named field instead of *, I don’t know Oracle enough for that.

Re-edit: indeed, if your second SELECT is actually an INSERT, you probably need that * 🙂 But I don’t think you can apply the same trick on the INSERT as the one on the UPDATE…

Re-re-edit: to write better what I put in the comment – taken from http://www.oradev.com/oracle_insert.jsp – your one and only request could be:

INSERT 
WHEN (0=(SELECT COUNT(id) FROM LIST WHERE JCODE=8 AND KCODE=01 AND LCODE=2011)) 
INTO LIST (field1, field2, field3, STS, field4, field5, NO, field6) 
SELECT field1, field2, field3, null, field4, field5, 1, field6 
    FROM LIST@LNDB 
    WHERE JCODE=8 AND KCODE=01 AND LCODE=2011 
    AND ban IN (SELECT BAN FROM billing_account)

Naturally you can add the GuZzie touch, use DECLARE, BEGIN and END to make the writing of parameters easier 😉