RE: Dimension table load - PLSQL question

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Thu, 29 Sep 2005 09:20:11 -0400
Message-ID: <F4C27E77F7A33E4CA98C19A9DC6722A245F892@EXCHANGE.corp.perceptron.com>

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...  

Igor Neyman

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From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Ranko Mosic Sent: Thursday, September 29, 2005 8:45 AM To: Paul Drake
Cc: ORACLE-L
Subject: Re: Dimension table load - PLSQL question

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. Thanks genius.  

On 9/28/05, Paul Drake <bdbafh_at_gmail.com> wrote:

        On 9/28/05, Ranko Mosic <ranko.mosic_at_gmail.com > wrote:         

		Hi, 
		requirement: 


		- 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 ) ? 
		
		
		Regards, Ranko.  
		



	Ranko,
	
	"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 <http://google.com/> + "I'm feeling lucky" produced this for me.

        Perhaps you might get lucky too.         

        Paul         

        http://www.psoug.org/reference/merge.html                  

        MERGE <hint> INTO <table_name>
USING <table_view_or_query>
ON (<condition>)
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;

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Received on Thu Sep 29 2005 - 08:22:33 CDT