Re: how to modify query

Harvinder,

Let's see what we can come up with:

insert into t_suspended_txn
select 'A', 'B'
from dual
where exists (select col1 from t_suspended_txn where col2 = 'A')

Although I don't honestly know if "dual" exists in SQL Server (in Oracle it's a single row, single column table - you could easily create a "dual" in SQL Server), otherwise:

insert into t_suspended_txn
select distinct 'A', 'B'
from t_suspended_txn where col2 = 'A'

This would work but might do an unnecessarily large sort if t_suspended_txn contains many rows, otherwise:

insert into t_suspended_txn
select 'A', 'B'
from t_suspended_txn where col2 = 'A' and rownum = 1

Although again, I don't know if SQL Server supports "rownum" as a pseudo column.

Hopefully I've given enough ideas to find something that works though.

Cheers,

     Mark.

                                                                                                                          
                    "Harvinder Singh"                                                                                     
                    <Harvinder.Singh_at_Metr       To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>       
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                    Sent by:                    Subject:     how to modify query                                          
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                    05/12/2002 06:04                                                                                      
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                    ORACLE-L                                                                                              
                                                                                                                          
                                                                                                                          

Hi,

Following code works in sql server but IF NOT EXISTS dosn't work in oracle how can we modify this code so that it should work on both sql server and oracle

 if not exists (
select
col1
from
t_suspended_txn
where
col2 ='A'
begin
insert into t_suspended_txn
select 'A' , 'B'
end

Thanks
--Harvinder

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