I am having trouble with the following simple query
SELECT * FROM users WHERE Created = '28/02/2013'
The issue is the column CREATED is a datetime datatype, so the query executes fine as long as the timestamp is 0:00:0, if the time stamp is set to say 12:00, then the query does not return a result set.
Any idea why?
Thanks
Because you are not specifying the time, so it assumes that you are doing:
SELECT * FROM users WHERE Created = '28/02/2013 00:00:00'
If you want the whole day, then you need a range of times:
SELECT *
FROM users
WHERE Created >= '20130228' AND Created < '20130301'
Also, please use non ambiguous format for dates ('YYYYMMDD') instead of other formats.
'YYYYMMDD' for SQL Server since its not ambiguous on that RDBMS (for DATETIME and DATE datatypes). (Though 'YYYY-MM-DD' is also not ambiguous for DATE datatype).
DATETIME truly is only YYYYMMDD (no dashes!). With the dashes - which would be the "normal" ISO-8601 standard does not work for all language settings - it can (and will) fail for e.g. "German" or "UK British" (or pretty much any European langauge) language settings...SELECT * FROM users WHERE CAST(Created AS DATE) = '28/02/2013'
will fix it, but be careful, it disables indexes
SELECT * FROM users WHERE Created BETWEEN '28/02/2013 00:00' AND '28/02/2013 23:59'
And this will use index
If you don't need to consider time: try to convert created field to date and then compare as;
SELECT * FROM users WHERE convert(date,Created) = '28/02/2013'
--this would be even better with iso date format (not culture specific)
SELECT * FROM users WHERE convert(date,Created) = '20130228' --yyyymmdd format
You have to convert the column into date and then compare
SELECT * FROM users WHERE CONVERT(VARCHAR(11), Created, 106) = '28 Feb 2013'
