"Cory Nelson" and the whole list wanted to know...
On Fri, Feb 22, 2013 at 9:56 AM, jose isaias cabrera wrote:
Greetings.
which one is faster...
#1.
SELECT id FROM LSOpenJobs WHERE bdate BETWEEN '2012-01-01' AND
'2012-12-31';
or this one...
#2
SELECT id FROM LSOpenJobs WHERE bdate IN ('2012-01-01', ...,
'2012-12-31)';
where , ..., would have all the rest of the dates. Thanks.
josé
This is a great opportunity to learn the Try It And See approach.
Note that:
- The first query will only perform 2 comparisons.
- The second query will perform 31 comparisons.
- Dates are not strongly-typed in SQLite, so this will perform string
comparisons without any special handling.
SELECT id FROM LSOpenJobs WHERE bdate BETWEEN '2012-01-01' AND '2012-12-31';
total records 5976
Total time 344ms
SELECT id FROM LSOpenJobs WHERE bdate IN ('2012-01-01',
'2012-01-02',
'2012-01-03',
'2012-01-04',
...clip...
'2012-12-29',
'2012-12-30',
'2012-12-31');
total records 5976
Total time 375ms
I guess BETWEEN wins vs IN. Thanks.
josé
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