## Extraction function

An extraction (extraction_function) is a function that extracts parts of a date value, time value, or time stamp value or that calculates a date, time, or time stamp value.

### Syntax

<extraction_function> ::=
DATE ( <expression> )
| DAY ( <date_or_timestamp_expression> )
| HOUR ( <time_or_timestamp_expression> )
| MICROSECOND ( <expression> )
| MINUTE ( <time_or_timestamp_expression> )
| MONTH ( <date_or_timestamp_expression> )
| SECOND ( <time_or_timestamp_expression> )
| TIME ( <expression> )
| TIMESTAMP ( <expression>[, <expression> ] )
| YEAR ( <date_or_timestamp_expression> )

<date_or_timestamp_expression> ::= <expression>

<time_or_timestamp_expression> ::= <expression>

### Examples

SQL Tutorial, Date and Time Calculations

### Explanation

When used in a function, the argument date_or_timestamp_expression must supply a date, a time stamp, or an alphanumeric value that matches the current date or time stamp format.

When used in a function, the argument time_or_timestamp_expression must supply a time, a time stamp value, or an alphanumeric value that matches the current time or time stamp format.

Date and time values are available in a variety of date and time formats (ISO, USA, EUR, JIS, INTERNAL).

See also:

Functions: Overview