select '2011-02-29' BETWEEN '2011-02-01' AND '2011-03-03'
this is returning 1. I think between doesn't consider leap year. I want your view on this?
[EDIT]
SELECT DATE( '2010-04-31' ) is returning NULL;
But select str_to_date('2010-04-31', '%Y-%m-%d') is retuning date.
Why?
Thanks Venu
you need to cast it to date like:
SELECT DATE('2011-02-29') BETWEEN DATE('2011-02-01') AND DATE('2011-03-03')
from the site :
For best results when using BETWEEN with date or time values, use CAST() to explicitly convert the values to the desired data type. Examples: If you compare a DATETIME to two DATE values, convert the DATE values to DATETIME values. If you use a string constant such as '2001-1-1' in a comparison to a DATE, cast the string to a DATE.
Problem is you're comparing strings, not dates. If you try:
select DATE('2011-02-29') you get a NULL...
You're comparing strings ... you have to cast the values (or at least the first one) to DATE
Use this:
SELECT DATE('2011-02-29') BETWEEN '2011-02-01' AND '2011-03-03'
This will give you NULL because the date is not real.
SELECT DATE('2008-02-29') BETWEEN '2008-02-01' AND '2008-03-03'
This will give you 1 (TRUE) because the date is real (leap year)
DATE checks the validity while str_to_date does not.
mysql> select str_to_date('2010-02-31', '%Y-%m-%d');
+---------------------------------------+
| str_to_date('2010-02-31', '%Y-%m-%d') |
+---------------------------------------+
| 2010-02-31 |
+---------------------------------------+
1 row in set (0.00 sec)
mysql> select str_to_date('2010-04-31', '%Y-%m-%d');
+---------------------------------------+
| str_to_date('2010-04-31', '%Y-%m-%d') |
+---------------------------------------+
| 2010-04-31 |
+---------------------------------------+
1 row in set (0.00 sec)
mysql> select date('2010-02-31');
+--------------------+
| date('2010-02-31') |
+--------------------+
| NULL |
+--------------------+
1 row in set, 1 warning (0.00 sec)
mysql> select date('2010-04-31');
+--------------------+
| date('2010-04-31') |
+--------------------+
| NULL |
+--------------------+
1 row in set, 1 warning (0.00 sec)
UPDATE according to @Aziz , DATE will check whether a date is real or not. According to my test, seems str_to_date does not check.
