Re: Check if a value in one table doesn't exist

From: <tday6_at_csc.com>
Date: Thu, 25 Oct 2001 07:13:34 -0700
Message-ID: <F001.003B438F.20011025071025@fatcity.com>

If you want to find the one's that don't have a match try:

select id from table1
minus
select id from table2;

                    Roland.Skoldb                                                      
    
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                                         Subject:     Check if a value in one table 
doesnt 
                                         exist                                         
    
                    10/25/2001                                                         
    
                    04:00 AM                                                           
    
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                    ORACLE-L

Hallo you DBA'

Can anyone give me a good example on a sql select statement checking if any value in id field in table one exists in table two's id field?Table two also contains the corresponding id field but with other field names besides. Like this

Table 1: Id         Name      Year
Table 2: :Id   City           Country

Thanks in advance

Roland Sköldblom

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