RE: SQL Statement Priority

From: Mark W. Farnham <mwf_at_rsiz.com>
Date: Thu, 24 Jan 2008 08:44:13 -0500
Message-ID: <013701c85e8f$35d3b3e0$1100a8c0@rsiz.com>

Do you mean like  

select *

from p_emb_op_types

where op = 'ISSUE' and inst_id = '&param'

union

select *

from p_emb_op_types

where op = 'ISSUE' and inst_id = '*'

   and '&param' not in (select inst_id from p_emb_op_types where op = 'ISSUE')   ?  

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From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Cristian Chelemen
Sent: Thursday, January 24, 2008 7:46 AM To: oracle-l_at_freelists.org
Subject: SQL Statement Priority     

Hi ALL!

I have a pretty nagging thing that bothers me for 2 days now and I want to find out your oppinion about it.  

Prerequisites:

CREATE TABLE p_emb_op_types(inst_id VARCHAR2(10 BYTE) NOT NULL,

                                                         op VARCHAR2(20
BYTE) NOT NULL,
                                                    status NUMBER

NOT NULL); CREATE UNIQUE INDEX uk_emb_op_types ON p_emb_op_types (inst_id, op, status);

INSERT INTO p_emb_op_types (inst_id, op, status) VALUES ('*', 'ISSUE', 60); INSERT INTO p_emb_op_types (inst_id, op, status) VALUES ('2', 'ISSUE', 70); COMMIT;   I want to build a SQL statement (will be part of a cursor) and I do not want to create a function for this... below italic pseudocode  

SELECT * FROM p_emb_op_types

WHERE op = 'ISSUE'

AND inst_id = (IF &param exists in inst_id column where op = 'ISSUE'

                      THEN &param

                      ELSE '*'

                      END IF;)

 

And I'll give you some examples of what it'll do:

if &param = '2' then retrieve '2', 'ISSUE', 70 line

if &param = '3' then retrieve '*', 'ISSUE', 60 line

if &param = '*' then retrieve '*', 'ISSUE', 60 line  

I hope that I made myself clear on this issue.  

Cristian     

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Received on Thu Jan 24 2008 - 07:44:13 CST