drop table if exists t1; SHOW GLOBAL VARIABLES LIKE "%_format%"; Variable_name Value date_format %d.%m.%Y datetime_format %Y-%m-%d %H:%i:%s default_week_format 0 time_format %H.%i.%s SHOW SESSION VARIABLES LIKE "%_format%"; Variable_name Value date_format %d.%m.%Y datetime_format %Y-%m-%d %H:%i:%s default_week_format 0 time_format %H.%i.%s SET time_format='%H%i%s'; SET time_format='%H:%i:%s.%f'; SET time_format='%h-%i-%s.%f%p'; SET time_format='%h:%i:%s.%f %p'; SET time_format='%h:%i:%s%p'; SET date_format='%Y%m%d'; SET date_format='%Y.%m.%d'; SET date_format='%d.%m.%Y'; SET date_format='%m-%d-%Y'; set datetime_format= '%Y%m%d%H%i%s'; set datetime_format= '%Y-%m-%d %H:%i:%s'; set datetime_format= '%m-%d-%y %H:%i:%s.%f'; set datetime_format= '%d-%m-%Y %h:%i:%s%p'; set datetime_format= '%H:%i:%s %Y-%m-%d'; set datetime_format= '%H:%i:%s.%f %m-%d-%Y'; set datetime_format= '%h:%i:%s %p %Y-%m-%d'; set datetime_format= '%h:%i:%s.%f %p %Y-%m-%d'; SHOW SESSION VARIABLES LIKE "%format"; Variable_name Value date_format %m-%d-%Y datetime_format %h:%i:%s.%f %p %Y-%m-%d default_week_format 0 time_format %h:%i:%s%p SET time_format='%h:%i:%s'; ERROR 42000: Variable 'time_format' can't be set to the value of '%h:%i:%s' SET time_format='%H %i:%s'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H %i:%s' SET time_format='%H::%i:%s'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H::%i:%s' SET time_format='%H:%i:%s%f'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H:%i:%s%f' SET time_format='%H:%i.%f:%s'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H:%i.%f:%s' SET time_format='%H:%i:%s%p'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H:%i:%s%p' SET time_format='%h:%i:%s.%f %p %Y-%m-%d'; ERROR 42000: Variable 'time_format' can't be set to the value of '%h:%i:%s.%f %p %Y-%m-%d' SET time_format='%H%i%s.%f'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H%i%s.%f' SET time_format='%H:%i-%s.%f'; ERROR 42000: Variable 'time_format' can't be set to the value of '%H:%i-%s.%f' SET date_format='%d.%m.%d'; ERROR 42000: Variable 'date_format' can't be set to the value of '%d.%m.%d' SET datetime_format='%h.%m.%y %d.%i.%s'; ERROR 42000: Variable 'datetime_format' can't be set to the value of '%h.%m.%y %d.%i.%s' set datetime_format= '%H:%i:%s.%f %p %Y-%m-%d'; ERROR 42000: Variable 'datetime_format' can't be set to the value of '%H:%i:%s.%f %p %Y-%m-%d' set GLOBAL datetime_format= '%H:%i:%s %Y-%m-%d'; SET SESSION datetime_format=default; select @@global.datetime_format, @@session.datetime_format; @@global.datetime_format @@session.datetime_format %H:%i:%s %Y-%m-%d %H:%i:%s %Y-%m-%d SET GLOBAL datetime_format=default; SET SESSION datetime_format=default; select @@global.datetime_format, @@session.datetime_format; @@global.datetime_format @@session.datetime_format %Y-%m-%d %H:%i:%s %Y-%m-%d %H:%i:%s SET GLOBAL date_format=default; SET GLOBAL time_format=default; SET GLOBAL datetime_format=default; SET time_format=default; SET date_format=default; SET datetime_format=default; select str_to_date(concat('15-01-2001',' 2:59:58.999'), concat('%d-%m-%Y',' ','%H:%i:%s.%f')); str_to_date(concat('15-01-2001',' 2:59:58.999'), concat('%d-%m-%Y',' ','%H:%i:%s.%f')) 2001-01-15 02:59:58.999000 create table t1 (date char(30), format char(30) not null); insert into t1 values ('2003-01-02 10:11:12', '%Y-%m-%d %H:%i:%S'), ('03-01-02 8:11:2.123456', '%y-%m-%d %H:%i:%S.%#'), ('2003-01-02 10:11:12 PM', '%Y-%m-%d %h:%i:%S %p'), ('2003-01-02 01:11:12.12345AM', '%Y-%m-%d %h:%i:%S.%f%p'), ('2003-01-02 02:11:12.12345AM', '%Y-%m-%d %h:%i:%S.%f %p'), ('2003-01-02 12:11:12.12345 am', '%Y-%m-%d %h:%i:%S.%f%p'), ('2003-01-02 11:11:12Pm', '%Y-%m-%d %h:%i:%S%p'), ('10:20:10', '%H:%i:%s'), ('10:20:10', '%h:%i:%s.%f'), ('10:20:10AM', '%h:%i:%s%p'), ('10:20:10.44AM', '%h:%i:%s.%f%p'), ('15-01-2001 12:59:58', '%d-%m-%Y %H:%i:%S'), ('15 September 2001', '%d %M %Y'), ('15 SEPTEMB 2001', '%d %M %Y'), ('15 MAY 2001', '%d %b %Y'), ('Sunday 15 MAY 2001', '%W %d %b %Y'), ('Sund 15 MAY 2001', '%W %d %b %Y'), ('Tuesday 00 2002', '%W %U %Y'), ('Thursday 53 1998', '%W %u %Y'), ('15-01-2001', '%d-%m-%Y %H:%i:%S'), ('15-01-20', '%d-%m-%y'), ('15-2001-1', '%d-%Y-%c'); select date,format,str_to_date(date, format) as str_to_date from t1; date format str_to_date 2003-01-02 10:11:12 %Y-%m-%d %H:%i:%S 2003-01-02 10:11:12 03-01-02 8:11:2.123456 %y-%m-%d %H:%i:%S.%# 2003-01-02 08:11:02 2003-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 2003-01-02 22:11:12 2003-01-02 01:11:12.12345AM %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 01:11:12.123450 2003-01-02 02:11:12.12345AM %Y-%m-%d %h:%i:%S.%f %p 2003-01-02 02:11:12.123450 2003-01-02 12:11:12.12345 am %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 00:11:12.123450 2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 23:11:12 10:20:10 %H:%i:%s 0000-00-00 10:20:10 10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10 10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10 10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 10:20:10.440000 15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 12:59:58 15 September 2001 %d %M %Y 2001-09-15 00:00:00 15 SEPTEMB 2001 %d %M %Y 2001-09-15 00:00:00 15 MAY 2001 %d %b %Y 2001-05-15 00:00:00 Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00 Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00 Tuesday 00 2002 %W %U %Y 2002-01-01 00:00:00 Thursday 53 1998 %W %u %Y 1998-12-31 00:00:00 15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 00:00:00 15-01-20 %d-%m-%y 2020-01-15 00:00:00 15-2001-1 %d-%Y-%c 2001-01-15 00:00:00 select date,format,concat('',str_to_date(date, format)) as con from t1; date format con 2003-01-02 10:11:12 %Y-%m-%d %H:%i:%S 2003-01-02 10:11:12 03-01-02 8:11:2.123456 %y-%m-%d %H:%i:%S.%# 2003-01-02 08:11:02 2003-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 2003-01-02 22:11:12 2003-01-02 01:11:12.12345AM %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 01:11:12.123450 2003-01-02 02:11:12.12345AM %Y-%m-%d %h:%i:%S.%f %p 2003-01-02 02:11:12.123450 2003-01-02 12:11:12.12345 am %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 00:11:12.123450 2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 23:11:12 10:20:10 %H:%i:%s 0000-00-00 10:20:10 10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10 10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10 10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 10:20:10.440000 15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 12:59:58 15 September 2001 %d %M %Y 2001-09-15 00:00:00 15 SEPTEMB 2001 %d %M %Y 2001-09-15 00:00:00 15 MAY 2001 %d %b %Y 2001-05-15 00:00:00 Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00 Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00 Tuesday 00 2002 %W %U %Y 2002-01-01 00:00:00 Thursday 53 1998 %W %u %Y 1998-12-31 00:00:00 15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 00:00:00 15-01-20 %d-%m-%y 2020-01-15 00:00:00 15-2001-1 %d-%Y-%c 2001-01-15 00:00:00 select date,format,cast(str_to_date(date, format) as datetime) as datetime from t1; date format datetime 2003-01-02 10:11:12 %Y-%m-%d %H:%i:%S 2003-01-02 10:11:12 03-01-02 8:11:2.123456 %y-%m-%d %H:%i:%S.%# 2003-01-02 08:11:02 2003-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 2003-01-02 22:11:12 2003-01-02 01:11:12.12345AM %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 01:11:12.123450 2003-01-02 02:11:12.12345AM %Y-%m-%d %h:%i:%S.%f %p 2003-01-02 02:11:12.123450 2003-01-02 12:11:12.12345 am %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 00:11:12.123450 2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 23:11:12 10:20:10 %H:%i:%s 0000-00-00 10:20:10 10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10 10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10 10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 10:20:10.440000 15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 12:59:58 15 September 2001 %d %M %Y 2001-09-15 00:00:00 15 SEPTEMB 2001 %d %M %Y 2001-09-15 00:00:00 15 MAY 2001 %d %b %Y 2001-05-15 00:00:00 Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00 Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 00:00:00 Tuesday 00 2002 %W %U %Y 2002-01-01 00:00:00 Thursday 53 1998 %W %u %Y 1998-12-31 00:00:00 15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 00:00:00 15-01-20 %d-%m-%y 2020-01-15 00:00:00 15-2001-1 %d-%Y-%c 2001-01-15 00:00:00 select date,format,DATE(str_to_date(date, format)) as date2 from t1; date format date2 2003-01-02 10:11:12 %Y-%m-%d %H:%i:%S 2003-01-02 03-01-02 8:11:2.123456 %y-%m-%d %H:%i:%S.%# 2003-01-02 2003-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 2003-01-02 2003-01-02 01:11:12.12345AM %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 2003-01-02 02:11:12.12345AM %Y-%m-%d %h:%i:%S.%f %p 2003-01-02 2003-01-02 12:11:12.12345 am %Y-%m-%d %h:%i:%S.%f%p 2003-01-02 2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 2003-01-02 10:20:10 %H:%i:%s 0000-00-00 10:20:10 %h:%i:%s.%f 0000-00-00 10:20:10AM %h:%i:%s%p 0000-00-00 10:20:10.44AM %h:%i:%s.%f%p 0000-00-00 15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 2001-01-15 15 September 2001 %d %M %Y 2001-09-15 15 SEPTEMB 2001 %d %M %Y 2001-09-15 15 MAY 2001 %d %b %Y 2001-05-15 Sunday 15 MAY 2001 %W %d %b %Y 2001-05-15 Sund 15 MAY 2001 %W %d %b %Y 2001-05-15 Tuesday 00 2002 %W %U %Y 2002-01-01 Thursday 53 1998 %W %u %Y 1998-12-31 15-01-2001 %d-%m-%Y %H:%i:%S 2001-01-15 15-01-20 %d-%m-%y 2020-01-15 15-2001-1 %d-%Y-%c 2001-01-15 select date,format,TIME(str_to_date(date, format)) as time from t1; date format time 2003-01-02 10:11:12 %Y-%m-%d %H:%i:%S 10:11:12 03-01-02 8:11:2.123456 %y-%m-%d %H:%i:%S.%# 08:11:02 2003-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 22:11:12 2003-01-02 01:11:12.12345AM %Y-%m-%d %h:%i:%S.%f%p 01:11:12.123450 2003-01-02 02:11:12.12345AM %Y-%m-%d %h:%i:%S.%f %p 02:11:12.123450 2003-01-02 12:11:12.12345 am %Y-%m-%d %h:%i:%S.%f%p 00:11:12.123450 2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 23:11:12 10:20:10 %H:%i:%s 10:20:10 10:20:10 %h:%i:%s.%f 10:20:10 10:20:10AM %h:%i:%s%p 10:20:10 10:20:10.44AM %h:%i:%s.%f%p 10:20:10.440000 15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 12:59:58 15 September 2001 %d %M %Y 00:00:00 15 SEPTEMB 2001 %d %M %Y 00:00:00 15 MAY 2001 %d %b %Y 00:00:00 Sunday 15 MAY 2001 %W %d %b %Y 00:00:00 Sund 15 MAY 2001 %W %d %b %Y 00:00:00 Tuesday 00 2002 %W %U %Y 00:00:00 Thursday 53 1998 %W %u %Y 00:00:00 15-01-2001 %d-%m-%Y %H:%i:%S 00:00:00 15-01-20 %d-%m-%y 00:00:00 15-2001-1 %d-%Y-%c 00:00:00 select date,format,concat(TIME(str_to_date(date, format))) as time2 from t1; date format time2 2003-01-02 10:11:12 %Y-%m-%d %H:%i:%S 10:11:12 03-01-02 8:11:2.123456 %y-%m-%d %H:%i:%S.%# 08:11:02 2003-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 22:11:12 2003-01-02 01:11:12.12345AM %Y-%m-%d %h:%i:%S.%f%p 01:11:12.123450 2003-01-02 02:11:12.12345AM %Y-%m-%d %h:%i:%S.%f %p 02:11:12.123450 2003-01-02 12:11:12.12345 am %Y-%m-%d %h:%i:%S.%f%p 00:11:12.123450 2003-01-02 11:11:12Pm %Y-%m-%d %h:%i:%S%p 23:11:12 10:20:10 %H:%i:%s 10:20:10 10:20:10 %h:%i:%s.%f 10:20:10 10:20:10AM %h:%i:%s%p 10:20:10 10:20:10.44AM %h:%i:%s.%f%p 10:20:10.440000 15-01-2001 12:59:58 %d-%m-%Y %H:%i:%S 12:59:58 15 September 2001 %d %M %Y 00:00:00 15 SEPTEMB 2001 %d %M %Y 00:00:00 15 MAY 2001 %d %b %Y 00:00:00 Sunday 15 MAY 2001 %W %d %b %Y 00:00:00 Sund 15 MAY 2001 %W %d %b %Y 00:00:00 Tuesday 00 2002 %W %U %Y 00:00:00 Thursday 53 1998 %W %u %Y 00:00:00 15-01-2001 %d-%m-%Y %H:%i:%S 00:00:00 15-01-20 %d-%m-%y 00:00:00 15-2001-1 %d-%Y-%c 00:00:00 truncate table t1; insert into t1 values ('2003-01-02 10:11:12 PM', '%Y-%m-%d %H:%i:%S %p'), ('2003-01-02 10:11:12.123456', '%Y-%m-%d %h:%i:%S %p'), ('2003-01-02 10:11:12AM', '%Y-%m-%d %h:%i:%S.%f %p'), ('2003-01-02 10:11:12AN', '%Y-%m-%d %h:%i:%S%p'), ('2003-01-02 10:11:12 PM', '%y-%m-%d %H:%i:%S %p'), ('10:20:10AM', '%H:%i:%s%p'), ('15 Septembei 2001', '%d %M %Y'), ('15 Ju 2001', '%d %M %Y'), ('Sund 15 MA', '%W %d %b %Y'), ('Sunday 01 2001', '%W %V %X'), ('Thursdai 12 1998', '%W %u %Y'), (NULL, get_format(DATE,'USA')), ('Tuesday 52 2001', '%W %V %X'); select date,format,str_to_date(date, format) as str_to_date from t1; date format str_to_date 2003-01-02 10:11:12 PM %Y-%m-%d %H:%i:%S %p NULL 2003-01-02 10:11:12.123456 %Y-%m-%d %h:%i:%S %p NULL 2003-01-02 10:11:12AM %Y-%m-%d %h:%i:%S.%f %p NULL 2003-01-02 10:11:12AN %Y-%m-%d %h:%i:%S%p NULL 2003-01-02 10:11:12 PM %y-%m-%d %H:%i:%S %p NULL 10:20:10AM %H:%i:%s%p NULL 15 Septembei 2001 %d %M %Y NULL 15 Ju 2001 %d %M %Y NULL Sund 15 MA %W %d %b %Y NULL Sunday 01 2001 %W %V %X NULL Thursdai 12 1998 %W %u %Y NULL NULL %m.%d.%Y NULL Tuesday 52 2001 %W %V %X NULL select date,format,concat(str_to_date(date, format),'') as con from t1; date format con 2003-01-02 10:11:12 PM %Y-%m-%d %H:%i:%S %p NULL 2003-01-02 10:11:12.123456 %Y-%m-%d %h:%i:%S %p NULL 2003-01-02 10:11:12AM %Y-%m-%d %h:%i:%S.%f %p NULL 2003-01-02 10:11:12AN %Y-%m-%d %h:%i:%S%p NULL 2003-01-02 10:11:12 PM %y-%m-%d %H:%i:%S %p NULL 10:20:10AM %H:%i:%s%p NULL 15 Septembei 2001 %d %M %Y NULL 15 Ju 2001 %d %M %Y NULL Sund 15 MA %W %d %b %Y NULL Sunday 01 2001 %W %V %X NULL Thursdai 12 1998 %W %u %Y NULL NULL %m.%d.%Y NULL Tuesday 52 2001 %W %V %X NULL truncate table t1; insert into t1 values ('10:20:10AM', '%h:%i:%s'), ('2003-01-02 10:11:12', '%Y-%m-%d %h:%i:%S'), ('03-01-02 10:11:12 PM', '%Y-%m-%d %h:%i:%S %p'); select date,format,str_to_date(date, format) as str_to_date from t1; date format str_to_date 10:20:10AM %h:%i:%s 0000-00-00 10:20:10 2003-01-02 10:11:12 %Y-%m-%d %h:%i:%S 2003-01-02 10:11:12 03-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 0003-01-02 22:11:12 Warnings: Note 1292 Truncated wrong string value: '10:20:10AM' select date,format,concat(str_to_date(date, format),'') as con from t1; date format con 10:20:10AM %h:%i:%s 0000-00-00 10:20:10 2003-01-02 10:11:12 %Y-%m-%d %h:%i:%S 2003-01-02 10:11:12 03-01-02 10:11:12 PM %Y-%m-%d %h:%i:%S %p 0003-01-02 22:11:12 Warnings: Note 1292 Truncated wrong string value: '10:20:10AM' drop table t1; select get_format(DATE, 'USA') as a; a %m.%d.%Y select get_format(TIME, 'internal') as a; a %H%i%s select get_format(DATETIME, 'eur') as a; a %Y-%m-%d %H.%i.%s select get_format(DATE, 'TEST') as a; a NULL select str_to_date('15-01-2001 12:59:59', GET_FORMAT(DATE,'USA')); str_to_date('15-01-2001 12:59:59', GET_FORMAT(DATE,'USA')) NULL explain extended select makedate(1997,1), addtime("31.12.97 11.59.59.999999 PM", "1 1.1.1.000002"),subtime("31.12.97 11.59.59.999999 PM", "1 1.1.1.000002"),timediff("01.01.97 11:59:59.000001 PM","31.12.95 11:59:59.000002 PM"),cast(str_to_date("15-01-2001 12:59:59", "%d-%m-%Y %H:%i:%S") as TIME), maketime(23,11,12),microsecond("1997-12-31 23:59:59.000001"); id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: Note 1003 select makedate(1997,1) AS `makedate(1997,1)`,addtime(_latin1'31.12.97 11.59.59.999999 PM',_latin1'31.12.97 11.59.59.999999 PM') AS `addtime("31.12.97 11.59.59.999999 PM", "1 1.1.1.000002")`,subtime(_latin1'31.12.97 11.59.59.999999 PM',_latin1'31.12.97 11.59.59.999999 PM') AS `subtime("31.12.97 11.59.59.999999 PM", "1 1.1.1.000002")`,timediff(_latin1'01.01.97 11:59:59.000001 PM',_latin1'31.12.95 11:59:59.000002 PM') AS `timediff("01.01.97 11:59:59.000001 PM","31.12.95 11:59:59.000002 PM")`,cast(str_to_date(_latin1'15-01-2001 12:59:59',_latin1'%d-%m-%Y %H:%i:%S') as time) AS `cast(str_to_date("15-01-2001 12:59:59", "%d-%m-%Y %H:%i:%S") as TIME)`,maketime(23,11,12) AS `maketime(23,11,12)`,microsecond(_latin1'1997-12-31 23:59:59.000001') AS `microsecond("1997-12-31 23:59:59.000001")` create table t1 (d date); insert into t1 values ('2004-07-14'),('2005-07-14'); select date_format(d,"%d") from t1 order by 1; date_format(d,"%d") 14 14 drop table t1; select str_to_date("2003-....01ABCD-02 10:11:12.0012", "%Y-%.%m%@-%d %H:%i:%S.%f") as a; a 2003-01-02 10:11:12.001200 create table t1 select str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f") as f1, str_to_date("10:11:12.0012", "%H:%i:%S.%f") as f2, str_to_date("2003-01-02", "%Y-%m-%d") as f3, str_to_date("02", "%d") as f4, str_to_date("02 10", "%d %H") as f5; describe t1; Field Type Null Key Default Extra f1 datetime YES NULL f2 time YES NULL f3 date YES NULL f4 date YES NULL f5 time YES NULL select * from t1; f1 f2 f3 f4 f5 2003-01-02 10:11:12 10:11:12 2003-01-02 0000-00-02 58:00:00 drop table t1; create table t1 select "02 10" as a, "%d %H" as b; select str_to_date(a,b) from t1; str_to_date(a,b) 0000-00-02 10:00:00 create table t2 select str_to_date(a,b) from t1; describe t2; Field Type Null Key Default Extra str_to_date(a,b) binary(29) YES NULL select str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f") as f1, str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S") as f2, str_to_date("2003-01-02", "%Y-%m-%d") as f3, str_to_date("02 10:11:12", "%d %H:%i:%S.%f") as f4, str_to_date("02 10:11:12", "%d %H:%i:%S") as f5, str_to_date("02 10", "%d %f") as f6; f1 f2 f3 f4 f5 f6 2003-01-02 10:11:12.001200 2003-01-02 10:11:12 2003-01-02 58:11:12 58:11:12 48:00:00.100000 Warnings: Note 1292 Truncated wrong datetime value: '2003-01-02 10:11:12.0012' drop table t1, t2; select str_to_date("2003-01-02 10:11:12.0012ABCD", "%Y-%m-%d %H:%i:%S.%f") as f1, addtime("-01:01:01.01 GGG", "-23:59:59.1") as f2, microsecond("1997-12-31 23:59:59.01XXXX") as f3; f1 f2 f3 2003-01-02 10:11:12.001200 -25:01:00.110000 10000 Warnings: Note 1292 Truncated wrong datetime value: '2003-01-02 10:11:12.0012ABCD' Note 1292 Truncated wrong time value: '-01:01:01.01 GG' Note 1292 Truncated wrong datetime value: '1997-12-31 23:59:59.01XXXX' select str_to_date("2003-04-05 g", "%Y-%m-%d") as f1, str_to_date("2003-04-05 10:11:12.101010234567", "%Y-%m-%d %H:%i:%S.%f") as f2; f1 f2 2003-04-05 2003-04-05 10:11:12.101010 Warnings: Note 1292 Truncated wrong date value: '2003-04-05 g' Note 1292 Truncated wrong datetime value: '2003-04-05 10:11:12.101010234567'