Date: Thu, 28 Jan 2010 07:18:01 -0800 (PST)
Hi all, this is my first foray into optimization and I'm at a relatively beginner level.
The situation that I have is an exceedingly simple one.
I have a table with a list of phone numbers, table A.
I have another table with a list of ranges of phone numbers, table B.
If the number in A lies between the start_range and end_range in B, then the number is marked.
For example, in A a number could be 2125551212. A range in B could be 2125550000, 2125552000. So this number would get marked.
So the query is
update A set A.marked = 'Y'
from RANGES B where a.phone >= b.START_RANGE and a.DEST_NO_011 <=b.END_RANGE);
Table A has about 9 million rows and B has about 3000.
This query runs for hours and hours.
I created index on A for phone indexes on B for start_range and end_range but it's still taking pretty long.
Any other pointers?
Sashi Received on Thu Jan 28 2010 - 09:18:01 CST