Query on Performance (Which Select is better)

Question

Hi All,
Database Version: 11.2.0.3.0
SELECT CSU.LOCATION ship_to_number,
                   (SELECT location
                      FROM seacds.hz_cust_site_uses_all_nv
                     WHERE SITE_USE_ID = CSU.BILL_TO_SITE_USE_ID
                       AND SITE_USE_CODE = 'BILL_TO'
                       AND CSU.STATUS = 'A') bill_to_num,
                   flv.lookup_code Corp_Code,            
                   (SELECT cust_type
                      FROM seagrs.seagrs_customer_profile
                     WHERE ship_to_num = csu.location) customer_type,
                   p.party_name customer_name,
                   l.address1 address,
                   l.city city,
                   L.STATE STATE,
                   l.country country,                 
                   csu.location ship_to_num
     FROM seacds.hz_cust_site_uses_all_nv  csu,
          seacds.hz_party_sites_nv         ps,
          seacds.hz_parties_nv             p,
          seacds.hz_cust_acct_sites_all_nv cas,
          seacds.hz_locations_nv           l,
          seacds.fnd_lookup_values_nv      flv  
    WHERE csu.site_use_code = 'SHIP_TO'
      AND csu.status = 'A'
      AND ps.party_site_id = cas.party_site_id        
      AND cas.cust_acct_site_id = csu.cust_acct_site_id
      AND flv.description = p.party_name
      AND csu.location = '44408001'
      AND PS.STATUS = 'A'
      AND ps.location_id = l.location_id
      and ps.party_id = p.party_id        
      AND csu.org_id in (SELECT org.operating_unit
                           from seacds.mtl_parameters_nv              mpn,
                                seacds.org_organization_definition_jv org
                          WHERE mpn.organization_id = org.organization_id
                            AND mpn.organization_code in
                                (SELECT erp_org_code
                                   FROM seagrs.seagrs_rtn_location
                                  where rtn_loc_type = 'DC'));
Select  P.Party_Number, Lvn.Lookup_Code, Lcsu.location
    From Seacds.Hz_Cust_Site_Uses_All_Nv  Csu,
         seacds.hz_cust_site_uses_all_nv  Lcsu,
         seacds.hz_party_sites_nv         ps,
         seacds.hz_parties_nv             p,
         Seacds.Hz_Cust_Acct_Sites_All_Nv Cas,
         Seacds.Hz_Locations_Nv           L,
         seacds.fnd_lookup_values_nv      LVN
   WHERE csu.site_use_code = 'SHIP_TO'
     AND csu.status = 'A'
     AND ps.party_site_id = cas.party_site_id
     And Cas.Cust_Acct_Site_Id = Csu.Cust_Acct_Site_Id
     And Csu.Location = '44408001'--p_ship_to_num_in
     and ps.status = 'A'
     AND ps.location_id = l.location_id
     And Ps.Party_Id = P.Party_Id
     AND Lvn.Lookup_Type = 'SEAOE_CORP_CODES'
     And Lvn.Description = P.Party_Name
     And Lcsu.Site_Use_Id = Csu.Bill_To_Site_Use_Id
     And Lcsu.Site_Use_Code = 'BILL_TO'
     AND csu.org_id = (SELECT org.operating_unit
                           from seacds.mtl_parameters_nv              mpn,
                                seacds.org_organization_definition_jv org
                          WHERE mpn.organization_id = org.organization_id
                            AND mpn.organization_code in
                                (SELECT erp_org_code
                                   From Seagrs.Seagrs_Rtn_Location
                                  Where Rtn_Loc_Type = 'DC'In the above two queries the first one is taking 1.2 seconds and the second one is taking 2 seconds, i hope the way the second one is written is an optimized way, but why it takes more time.
Thanks and Regards
Srinivas

Answer 1

Hi Karthik,
Agreed, will perform the SQL trace, but as of now Database is brought down for maintenance. Will get back once it's up. As you have mentioned the difference is negligible, but wish to know which was the appropriate way of selecting the records out of the two. I will perform SQL Trace and get back. Thanks for your response.
Thanks and Regards
Srinivas