Parse date in MySQL
MysqlDate FormatDate FormattingDate ParsingMysql Problem Overview
How to convert the following into date for insertion/update into a TIMESTAMP
or DATE
field in MySQL?
'15-Dec-09'
DATE_FORMAT()
is used to format date, but not the other way around.
Mysql Solutions
Solution 1 - Mysql
You may want to use the STR_TO_DATE()
function. It's the inverse of the DATE_FORMAT()
function.
> STR_TO_DATE(str,format)
>
> This is the inverse of the DATE_FORMAT()
function. It takes a string str
and a format string format
. STR_TO_DATE()
returns a DATETIME
value if the format string contains both date and time parts, or a DATE
or TIME
value if the string contains only date or time parts. If the date, time, or datetime value extracted from str
is illegal, STR_TO_DATE()
returns NULL
and produces a warning.
Example:
SELECT STR_TO_DATE('15-Dec-09', '%d-%b-%y') AS date;
+------------+
| date |
+------------+
| 2009-12-15 |
+------------+
1 row in set (0.00 sec)
Solution 2 - Mysql
Here's a table of format %-codes used in DATE_FORMAT() and STR_TO_DATE().
-----examples-for------
1999-12-31 2000-01-02
23:59:58.999 03:04:05 identical to
------------ ---------- -------------
%a Fri Sun LEFT(DAYNAME(d),3)
%b Dec Jan LEFT(MONTHNAME(d),3)
%c 12 1 MONTH(d)
%D 31st 2nd DAYOFMONTH(d)+st,nd,rd
%d 31 02 LPAD(DAYOFMONTH(d),0,2)
%e 31 2 DAYOFMONTH(d)
%f 999000 000000 LPAD(MICROSECOND(t),6,0)
%H 23 03 LPAD(HOUR(t),2,0)
%h 11 03
%I 11 03
%i 59 04 LPAD(MINUTE(t),2,0)
%j 365 002
%k 23 3 HOUR(t)
%l 11 3
%M December January MONTHNAME(d)
%m 12 01 LPAD(MONTH(d),2,0)
%p PM AM
%r 11:59:58 PM 03:04:05 AM
%S 58 05 LPAD(SECOND(t),2,0)
%s 58 05 LPAD(SECOND(t),2,0)
%T 23:59:58 03:04:05
%U 52 01 LPAD(WEEK(d,0),2,0)
%u 52 00 LPAD(WEEK(d,1),2,0)
%V 52 01 RIGHT(YEARWEEK(d,2),2)
%v 52 52 RIGHT(YEARWEEK(d,3),2)
%W Friday Sunday DAYNAME(d)
%w 5 0 DAYOFWEEK(d)-1
%X 1999 2000 LEFT(YEARWEEK(d,2),4)
%x 1999 1999 LEFT(YEARWEEK(d,3),4)
%Y 1999 2000 YEAR(d)
%y 99 00 RIGHT(YEAR(d),2)
%% % %
or
%X%V 199952 200001 YEARWEEK(d,2)
%x%v 199952 199952 YEARWEEK(d,3)
By the way there are no %-codes for unpadded minutes or seconds:
59 4 MINUTE(t)
58 5 SECOND(t)
In action:
'15-Dec-09' == DATE_FORMAT('2009-12-15', '%d-%b-%y')
'2009-12-15' == STR_TO_DATE('15-Dec-09', '%d-%b-%y')