Re: SQL PROBLEM

From: <Diana_Duncan_at_ttpartners.com>
Date: Thu, 24 May 2001 12:32:48 -0700
Message-ID: <F001.0030E063.20010524121108@fatcity.com>

Harvinder,

I think, if I understand the problem, that the following will work:

select ord_id, count(*)
from (select nvl(a.ord_id, b.ord_id) ord_id

     from TableA a, TableB b
     where b.line_id = a.line_id
     union all
     select ord_id
     from TableA
     where line_id is null

)
group by ord_id
/

Diana Duncan
TITAN Technology Partners
One Copley Parkway, Ste 540
Morrisville, NC 27560
VM: 919.466.7337 x 316
F: 919.466.7427
E: Diana_Duncan_at_ttpartners.com

                                                                                       
                                    
                    Harvinder Singh                                                    
                                    
                    <Harvinder.Singh_at_Metr        To:     Multiple recipients of list 
ORACLE-L <ORACLE-L_at_fatcity.com>       
                    aTech.com>                   cc:                                   
                                    
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                    root_at_fatcity.com             Subject:     SQL PROBLEM              
                                    
                                                                                       
                                    
                                                                                       
                                    
                    05/24/2001 02:46 PM                                                
                                    
                    Please respond to                                                  
                                    
                    ORACLE-L

Hi,

Favour me in suggest a hint in writing a sql for following scenaio:

Table A has 2 columns ord_id and line_id

example rows are:

ord_id         line_id
17                null
null              42

Table B has columns ord_id and line_id

ord_id         line_id
17                42
17                43
17                44

I have to write a sql to count(*) from table A where ord_id=17 .. as u see from table B line 42 is row of ord_id=17 ..so i want count(*) should show =2 from tabel A
but if i do count(*) from table A where ord_id=17..it shows 1.. i need to put another condition which will check line id with TABLE B and if it is for this particular order ...add that also in count(*).............
I know scenario is little fuzzy sorry for it..but if u got my point kindly respond.

Thanks
Harvinder

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