Question

I am using SQL Server as my database. I am searching for a row for the date that I have entered. This means searching rows where submission_date is exactly '12/13/2011'. First I am converting the search criteria date to milliseconds

i.e.

Dec 13 2011 00:00:00 ='1323727200000'
Dec 14 2011 00:00:00 ='1323813600000'`

SELECT * 
FROM log_file 
WHERE submission_date BETWEEN '1323727200000' AND '1323813600000' 

This query will search for Dec 13 Midnight to Dec 14 Midnight, but I want to skip the upper limit value i.e. from Dec 13 2011 00:00:00 to Dec 13 2011 59:59:59. For this I thought to use >= and <. Is this a right approach?

Having done this, I have a iBatis xml where I am writing the following which is giving me error.

<isNotEmpty prepend="AND" property="submissiondate">
   submission_date <![CDATA[ >= ]]> #submissiondate # AND <![CDATA[ < ]]> #submissiondate #
</isNotEmpty>

Please suggest if this is the right approach.

Thanks

Answer 1

Yes, you’d use >= and < typically for time/date range queries

Alternatively, you could subtract 3 milliseconds from the upper limit to get the highest datetime (not newer datetime2) value for that day (xxx 23:59.59.997)

SELECT * FROM   log_file
WHERE  submission_date BETWEEN 1323714600000 AND 1323801000000-3

Note: subtracting 1 would probably be OK if everything is milliseconds…

Edit, example of why 3ms

SELECT 
    DATEADD(millisecond, -1, '20111214'), -- 2011-12-14 00:00:00.000
    DATEADD(millisecond, -2, '20111214'), -- 2011-12-13 23:59:59.997
    DATEADD(millisecond, -3, '20111214')  -- 2011-12-13 23:59:59.997

And interestingly, are you sure this is midnight?
For 1323813600 seconds, I get 2011-12-13 22:00:00

On SQL Server:

SELECT DATEADD(second, 1323813600, '19700101') 

On MySQL

SELECT FROM_UNIXTIME(1323813600)