RE: Dimension table load - PLSQL question

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Thu, 29 Sep 2005 09:58:12 -0400
Message-ID: <F4C27E77F7A33E4CA98C19A9DC6722A245F8D2@EXCHANGE.corp.perceptron.com>

>From Oracle docs:
 

 "merge_insert_clause

.....................................
.....................................

 You can specify this clause by itself or with the merge_update_clause. If you specify both, then they can be in either order."

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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 9:51 AM To: Igor Neyman
Cc: Paul Drake; ORACLE-L
Subject: Re: Dimension table load - PLSQL question

Not in my test - I tried to omitt "matched" and it won't do. SQL> l
  1 MERGE INTO bonuses D
  2 USING (SELECT employee_id, salary, department_id FROM employees   3 WHERE department_id = 80) S
  4 ON (D.employee_id = S.employee_id)
  5 WHEN NOT MATCHED THEN INSERT (D.employee_id, D.bonus)   6* VALUES (S.employee_id, S.salary*0.1) SQL> /
VALUES (S.employee_id, S.salary*0.1)

                                   * 

ERROR at line 6:
ORA-00905: missing keyword
rm  

On 9/29/05, Igor Neyman <ineyman_at_perceptron.com> wrote:

        "when matched" clause is optional, so you should be fine without updates.

        As for returning PK, regular "INSERT" has "RETURNING" clause, but I don't see one for "insert" used withing "MERGE". File "enhancement request" with Oracle :)

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        From: oracle-l-bounce_at_freelists.org [mailto: oracle-l-bounce_at_freelists.org <mailto:oracle-l-bounce_at_freelists.org> ] On Behalf Of Ranko Mosic

	Sent: Thursday, September 29, 2005 9:34 AM
	To: Igor Neyman
	Cc: Paul Drake; ORACLE-L 
	
	Subject: Re: Dimension table load - PLSQL question
	
	
	 
		What about returning key if record exists ? There is no

update happening.          

        Thanks, rm.                   

        On 9/29/05, Igor Neyman <ineyman_at_perceptron.com <mailto:ineyman_at_perceptron.com> > wrote:

                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
				
		 
________________________________

		From: oracle-l-bounce_at_freelists.org [mailto:

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 - 09:00:45 CDT