Re: Long running SQL Problem?

From: <tday6_at_csc.com>
Date: Wed, 27 Mar 2002 05:48:26 -0800
Message-ID: <F001.00434B2F.20020327054826@fatcity.com>

Try something like

select a.col1||a.col2, b.col3||b.col4 from table1 a, table2 b
where a.col1||a.col2 = b.col3||b.col4 (+))
WHERE b.col3||b.col4 IS NULL;

I think that works.

                                                                                           
                    Denham Eva                                                             
                    <EvaD                To:     Multiple recipients of list ORACLE-L      
                    @TFMC.co.za>         <ORACLE-L_at_fatcity.com>                            
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                                         Subject:     Long running SQL Problem?            
                                                                                           
                    03/27/2002                                                             
                    03:53 AM                                                               
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                    ORACLE-L                                                               
                                                                                           
                                                                                           

Hello List

Is there anyone who can give me a solution to this problem. It is a sql that runs forever and I eventually have to kill it, both tables are large 500000 + rows.
Is there perhaps a quicker more effecient way of doing this.

SELECT col1,col2
FROM Table_1
WHERE (col1,col2) NOT IN (SELECT col3,col4 FROM Table_2);

TIA
Denham Eva
Oracle DBA

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