Swapping where condition columns for tuning

Hi all,
I am having two tables (Table1 and Table2). Both tables are having primary key, those are same. Table1 having large data and Table2 is having half of Table1 data.
My question is i want to select from these two tables. Which one is better in where condition
select * from Table1, Table2 where
Table1.col1 = Table2.col1 OR Table2.col1 = Table1.col1
I tested with set timing on in SQLPLUS. Table2.col1 = Table1.col1 is efficient.
i.e. table with less data on LEFT side of the where condition.
Am i correct ? and anymore ideas how to make it more efficient.
Thanks in advance,
Pal

There shouldn't be difference in the way you write queries. The timing difference may depend on different factors not only in the way you write SQL.
Anyway to tell the optimizer that you prefer to scan some tables first you can use the LEADING hint.
http://download.oracle.com/docs/cd/B28359_01/server.111/b28286/sql_elements006.htm#SQLRF50705
Bye Alessandro

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Hi all,
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Please advice, if there is any other way to achieve this requirement.
Thanks,
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Code***************
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      comp_fld    TYPE cl_abap_structdescr=>component.
TYPES: f_count TYPE i.
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*                <ls_outtab> TYPE ANY,
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Hi Sanket,
The above given logic of mine works for you, put the code in the If condition and try-
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thanks\
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Hi,
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refresh force on demand
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Message was edited by:
rdpatric

Hi Gints,
Thank you for your reply. This is my query and
nvl(TICKET_JOIN.TDQRLV,0) ACC_SHIPPED_QTY,
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select
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TICKET_JOIN.TKDO01 HIRE_ID,
TICKET_JOIN.TKQ101 TRUCK_ID,
TICKET_JOIN.TKVEHT TRUCK_TYPE,
1 TRUCK_COMM,
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0 CHECKIN_TIME,
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nvl(DDADTM,0) START_TIME
from
(select
TICKET.TKCMP1,
TICKET.TKDO01,
TICKET.TKQ101,
TICKET.TKADTM ,
TICKET.TKVEHT,
TICKET_DETAILS.TDAITM ,
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TICKET_DETAILS.TDSOQS ,
TICKET.TKCNTF,
TICKET.TKTRDJ,
TICKET.TK58GA8
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DDCNTF,
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DDAITM,
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Where condition on date column using OleDb Command?

Hi,
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For all entries Where condition character length partilally has to be used

Hi,
I need to fetch all the data reocrds of one internal table into the other with the condition that in one of the field of first internal table only partial length of the character has to be used as a where condition.
Example:
Select xxxx
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Hi.
If you are trying to fetch from any database table based on your modified table use this logic.
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Edited by: Thomas Zloch on Mar 2, 2010 2:47 PM

I thought it's funny.
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Check the use of TABLE ALIASes and COLUMN ALIASes in the following blog:
http://www.sqlusa.com/bestpractices2005/organizationtree/
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Swapping where condition columns for tuning

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