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Last 10 records based on a condition
Message
 
 
To
30/12/2001 23:07:54
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00599284
Message ID:
00599290
Views:
22
>>>I need to get the last 10 records of a table based on a condition. However, that table is pretty big and I don't want to use the TOP 10 clause as it will take too long. What type of approach can I use which would be the best? I am looking for a SQL approach. If that is not possible then I'll consider using code.
>>
>>How do you know that TOP 10 would take too long? Try
SELECT TOP 10 *, RECNO() AS recno ;
>>  FROM mytable ;
>>  WHERE < your condition > ;
>>  ORDER BY Recno DESC ;
>>  INTO CURSOR mycursor
>
>One a one million records table, it takes about 20 seconds to get the results. That's why I asked for another approach. I didn't think of that RECNO() approach. That is faster than what I used before. But, it is still too long.

Try
Select mytable 
SET ORDER TO
SET FILTER TO < your condition > 
GO BOTTOM
SKIP -9
COPY REST TO result
--sb--
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