DAYOFMONTH

The DAYOFMONTH function returns an integer between 1 and 31 that represents the day of the month.

expression: An expression that returns a value of one of the following built-in data types: a date, a timestamp, a character string, or a graphic string.
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.

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.

Examples

Using the PROJECT table, set the host variable END_DAY (SMALLINT) to the day that the WELD LINE PLANNING project (PROJNAME) is scheduled to stop (PRENDATE).
```
SELECT DAYOFMONTH(PRENDATE)
  INTO :END_DAY
  FROM PROJECT
  WHERE PROJNAME = 'WELD LINE PLANNING'
```
Results in END_DAY being set to 15.