| query for count by minute [message #3022] |
Fri, 30 August 2002 07:37  |
Joe
Messages: 138
Registered: November 1999
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Senior Member |
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I have a table with three columns:
customer varchar2(15),
started date,
completed date
I need to create a report that will give me the max(count) per customer, minute (which doesn't exist), where started <= each minute of a day, and completed >= each minute of a day...I wrote a perl script to perform a query for each minute, but it is taking too long. I have nearly 3 million rows in this table on any given day. Any help is appreciated.
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| Re: query for count by minute [message #3028 is a reply to message #3022] |
Fri, 30 August 2002 11:37  |
Dhiren
Messages: 43
Registered: July 2002
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Member |
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u will need to have a small table which will have
a number column and have 60 rows entered in it
as 1.....60.
Then do an outer join with this table
to get the desired result.
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