Does it make a difference: 1 table or 6?
MERGE INTO t
USING (SELECT(select descr1 from lkp_table1 where cd = p_cd1) AS v_descr1,
select descr2 from lkp_table2 where cd = p_cd2) AS v_descr2 ,
.... etc. )from dual) c
ON (t.descr1 = c.v_descr1 and t.descr2 = c.v_descr2 and ... etc)
WHEN NOT MATCHED INSERT (t.descr1, t.descr2, ...)
VALUES (c.v_descr1, c.v_descr2, ...)
Really, no need to react the way, you did...
Thanks for very helpful, no patronizing answer. If you've read more carefully what the problem is
you'd see that MERGE can't work because it works on one table upserting another.
I have one table being inserted from 6 tables.
On 9/28/05, Paul Drake <email@example.com> wrote:
On 9/28/05, Ranko Mosic <firstname.lastname@example.org > wrote:
- input parameters are codes p_cd1, p_cd2, ...
- for these codes I get descriptions ( select descr1 into v_descr1 from
lkp_table1 where cd = p_cd1; select descr2 into v_descr2 from lkp_table2 where
cd = p_cd2 etc )
- check if table t has records where t.descr1 = v_descr1
and t.descr2 = v_descr2 and on and on ....;
- if row exists return primary key;
- if not then insert.
What is the best way of doing it ( simplest ) ?
"Simplest way" is to solicit opinions without using a search engine or checking the documentation.
Its also usually "simplest" to leverage the existing provided functionality, rather than writing your own routines, error handling, etc.
A search of "oracle 10.1 upsert" in google.com + "I'm feeling lucky" produced this for me.
Perhaps you might get lucky too.
||MERGE <hint> INTO <table_name>|
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;