An extraction function is a
function that extracts parts of a date value, time value, or timestamp value or that calculates a date, time, or timestamp value.Syntax
<extraction_function> ::=
YEAR ( <date_or_timestamp_expression> )
| MONTH ( <date_or_timestamp_expression> )
| DAY ( <date_or_timestamp_expression> )
| HOUR ( <time_or_timestamp_expression> )
| MINUTE ( <time_or_timestamp_expression> )
| SECOND ( <time_or_timestamp_expression> )
| MICROSECOND ( <expression> )
| TIMESTAMP ( <expression>[, <expression> ] )
| DATE ( <expression> )
| TIME ( <expression> )
A variety of
date and time formats (ISO, USA, EUR, JIS, INTERNAL) are available for processing date and time values.