Re: SQL Statement Priority

Replace your select * with a column list and then use either decode or case to get what you want.

Allan

On Jan 24, 2008 6:46 AM, Cristian Chelemen <cristian_chelemen_at_yahoo.com> wrote:

> 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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