Re: [SQL] How to speeed up the query performance

[Abdul Wahab Dahalan]

Hai Chris!
Thanks for the solution but seem it doesnt work.
(0 rows) returned when I used NOT EXITS but (4 rows) returned
when NOT IN is used...................

FYI I used 7.2

Christoph Haller wrote:

How do I speed up the quey performance if I've a query like this :
Does 'not in' command will affected the performance?.
    

Yes, it's well known to be slow in 7.3 and lower, should be fixed in 7.4
AFAIK.
  

select

    

ts.transportid,ts.transporttype,ts.transportcapacity,ts.transportstatus,ts.routecoverage,ts.transportregnumber

  

from       transportsetup ts
where     ts.bizid = 'B126'
and         ts.deletestatus = 0
and         ts.transportid not in (    select t.transportid
                                                  from transportsetup
    

t,servicedetail s,logisticservice l
  

                                                  where
    

t.bizid=l.bizid
  

                                                      and
    

l.serviceid=s.serviceid
  

                                                      and
    

t.transportid=s.transportid
  

                                                      and t.bizid =
    

'B126'
  

                                                      and
    

l.status='Pending'
  

                                                  or t.bizid=l.bizid
                                                      and
    

l.serviceid=s.serviceid
  

                                                      and
    

t.transportid=s.transportid
  

                                                      and t.bizid =
    

'B126' and l.status='Reserved' )
  

order by ts.transporttype;

    

As recently mentioned by Stephan Szabo on '[SQL] How to optimize this
query ?'
NOT EXISTS performs much better.

Try:
select
ts.transportid,ts.transporttype,ts.transportcapacity,ts.transportstatus,ts.routecoverage,ts.transportregnumber

from    transportsetup ts
where   ts.bizid = 'B126'
and     ts.deletestatus = 0
and     NOT EXISTS (    select t.transportid
        from transportsetup t,servicedetail s,logisticservice l
        where ts.transportid = t.transportid
            and t.bizid=l.bizid
            and l.serviceid=s.serviceid
            and t.transportid=s.transportid
            and t.bizid = 'B126'
            and l.status='Pending'
        or t.bizid=l.bizid
            and l.serviceid=s.serviceid
            and t.transportid=s.transportid
            and t.bizid = 'B126' and l.status='Reserved' )
order by ts.transporttype;

Regards, Christoph