MONTH
The MONTH function returns the month part of a value.
- expression
- An expression that returns a value of one of the following built-in
data types: a date, a timestamp, a character string, a graphic string,
or a numeric data type.
- If expression is a character or graphic string, its value must be a valid string representation of a date or timestamp. For the valid formats of string representations of dates and timestamps, see String representations of datetime values.
- If expression is a number, it must be a date duration or timestamp duration. For the valid formats of datetime durations, see Datetime operands and durations.
The result of the function is a large integer. If the argument can be null, the result can be null; if the argument is null, the result is the null value.
The other rules depend on the data type of the argument:
- If the argument is a date, a timestamp, or a valid character-string
representation of a date or timestamp:
The result is the month part of the value, which is an integer between 1 and 12.
- If the argument is a date duration or timestamp duration:
The result is the month part of the value, which is an integer between -99 and 99. A nonzero result has the same sign as the argument.
Example
- Select all rows from the EMPLOYEE table for people who were born
(BIRTHDATE) in DECEMBER.
SELECT * FROM EMPLOYEE WHERE MONTH(BIRTHDATE) = 12