Which is faster?

[fernando.olmos at hpa.com.au]

I have a table (X) which has over 200 thousand records and is linked to
another table (Y) as one-to-one. 

I need to select certain records from the entire complex, and I was
wondering which one of these would do it faster? 

[1]     access table_x link order_no to order_no of table_y 
        select if field1 of table_x = 1234 

of is this faster? 

[2]     access table_x link order_no to order_no of table_y 
        select table_x if field1 of table_x = 1234 

I figured that either way is the same, but I've timed the 2nd option and
it's remarkably faster. Is this because PH is actually filtering out the
records in the query, at the table level, if you say "select table if",
as opposed to waiting for the entire record complex and then applying
the filter?

Thanks guys 

Fernando Olmos 
MIS 
Senior Analyst Programmer 

HPA
Direct:  03 9217 5411
Mobile: 0410 382 857
Fax:     03 9217 5716 

 <file:///H:/Appdata/Microsoft/Signatures/www.hpa.com.au> www.hpa.com.au



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