Date and Time Functions

TiDB supports all of the date and time functions available in MySQL 5.7.

Note
  • MySQL will often accept the incorrectly formatted date and time values. For example, '2020-01-01\n\t01:01:01' and '2020-01_01\n\t01:01' are treated as valid date and time values.
  • TiDB makes the best effort to match MySQL's behavior, but it might not match in all instances. It is recommended to correctly format dates, because the intended behavior for incorrectly formatted values is not documented, and is often inconsistent.

Date/Time functions:

NameDescription
ADDDATE()Add time values (intervals) to a date value
ADDTIME()Add time
CONVERT_TZ()Convert from one time zone to another
CURDATE()Return the current date
CURRENT_DATE(), CURRENT_DATESynonyms for CURDATE()
CURRENT_TIME(), CURRENT_TIMESynonyms for CURTIME()
CURRENT_TIMESTAMP(), CURRENT_TIMESTAMPSynonyms for NOW()
CURTIME()Return the current time
DATE()Extract the date part of a date or datetime expression
DATE_ADD()Add time values (intervals) to a date value
DATE_FORMAT()Format date as specified
DATE_SUB()Subtract a time value (interval) from a date
DATEDIFF()Subtract two dates
DAY()Synonym for DAYOFMONTH()
DAYNAME()Return the name of the weekday
DAYOFMONTH()Return the day of the month (0-31)
DAYOFWEEK()Return the weekday index of the argument
DAYOFYEAR()Return the day of the year (1-366)
EXTRACT()Extract part of a date
FROM_DAYS()Convert a day number to a date
FROM_UNIXTIME()Format Unix timestamp as a date
GET_FORMAT()Return a date format string
HOUR()Extract the hour
LAST_DAYReturn the last day of the month for the argument
LOCALTIME(), LOCALTIMESynonym for NOW()
LOCALTIMESTAMP, LOCALTIMESTAMP()Synonym for NOW()
MAKEDATE()Create a date from the year and day of year
MAKETIME()Create time from hour, minute, second
MICROSECOND()Return the microseconds from argument
MINUTE()Return the minute from the argument
MONTH()Return the month from the date passed
MONTHNAME()Return the name of the month
NOW()Return the current date and time
PERIOD_ADD()Add a period to a year-month
PERIOD_DIFF()Return the number of months between periods
QUARTER()Return the quarter from a date argument
SEC_TO_TIME()Converts seconds to 'HH:MM:SS' format
SECOND()Return the second (0-59)
STR_TO_DATE()Convert a string to a date
SUBDATE()Synonym for DATE_SUB() when invoked with three arguments
SUBTIME()Subtract times
SYSDATE()Return the time at which the function executes
TIME()Extract the time portion of the expression passed
TIME_FORMAT()Format as time
TIME_TO_SEC()Return the argument converted to seconds
TIMEDIFF()Subtract time
TIMESTAMP()With a single argument, this function returns the date or datetime expression; with two arguments, the sum of the arguments
TIMESTAMPADD()Add an interval to a datetime expression
TIMESTAMPDIFF()Subtract an interval from a datetime expression
TO_DAYS()Return the date argument converted to days
TO_SECONDS()Return the date or datetime argument converted to seconds since Year 0
UNIX_TIMESTAMP()Return a Unix timestamp
UTC_DATE()Return the current UTC date
UTC_TIME()Return the current UTC time
UTC_TIMESTAMP()Return the current UTC date and time
WEEK()Return the week number
WEEKDAY()Return the weekday index
WEEKOFYEAR()Return the calendar week of the date (1-53)
YEAR()Return the year
YEARWEEK()Return the year and week

For details, see Date and Time Functions.

MySQL compatibility

The function str_to_date() is supported by TiDB, but is unable to parse all date and time values. In addition, the following date and time formatting options are not implemented:

FormatDescription
"%a"Abbreviated weekday name (Sun..Sat)
"%D"Day of the month with English suffix (0th, 1st, 2nd, 3rd)
"%U"Week (00..53), where Sunday is the first day of the week; WEEK() mode 0
"%u"Week (00..53), where Monday is the first day of the week; WEEK() mode 1
"%V"Week (01..53), where Sunday is the first day of the week; WEEK() mode 2; used with %X
"%v"Week (01..53), where Monday is the first day of the week; WEEK() mode 3; used with %x
"%W"Weekday name (Sunday..Saturday)
"%w"Day of the week (0=Sunday..6=Saturday)
"%X"Year for the week where Sunday is the first day of the week, numeric, four digits.
"%x"Year for the week, where Monday is the first day of the week, numeric, four digits.

See issue #30082 for more details.

The default_week_format variable affects the WEEK() function.

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