The EXTRACT function extracts one or more portions of a date, such as a day, month or year. This is useful for performing logic on portions of a date, such as performing certain actions in certain months. This is also useful for assembling a date string in a specific format.
This function returns a different datatype based on the requested field value.
EXTRACT(date_tokens FROM date_expression)
Required. One or more tokens representing the portions of date to be extracted, as determined by one or more of the strings shown in the table below. Date_tokens may also contain punctuation marks to create simple format string for dates, as shown in the examples below. When punctuation marks are used, date_tokens should be enclosed in single quotes.
Date Token | Return Datatype | Description |
---|---|---|
YEAR | INTEGER | Returns Year in CCYY format. |
MONTH | INTEGER | Returns numeric Month from 1 to 12. |
DAY | INTEGER | Returns numeric Day of the Month. |
HOUR | INTEGER | Returns numeric Hour. |
MINUTE | INTEGER | Returns numeric Minute. |
SECOND | INTEGER | Returns numeric Second. |
A | STRING(2) | Returns Lowercase am/pm indicator. |
AA | STRING(2) | Uppercase AM/PM indicator. |
D | INTEGER | Returns numeric Day of the Month (1 to 31). |
0D | STRING(2) | Zero-filled day-of-month (01, 02, 03) |
DD | INTEGER | Day of year in one, two or three digit format. |
0DD | STRING(3) | Zero-filled day of year (044) |
F | INTEGER | Non-zero-filled fraction of a second (1, 2) |
0F | STRING(2) | Zero-filled fraction of a second (01, 02) |
H | INTEGER | 12-hour, non-zero-filled hour of day (12, 1) |
0H | STRING(2) | 12-hour, zero-filled hour of day (12, 01) |
HH | INTEGER | 24-hour, non-zero-filled hour of day (24, 1) |
0HH | C STRINg(2) | 24-hour, zero-filled hour of day (24, 01) |
J | DOUBLE | Non-zero-filled Julian date (1, 2) |
0J | STRING(11) | Zero-filled Julian date (01, 02) |
M | INTEGER | Non-zero-filled month number (1-January, 2-February) |
0M | STRING(2) | Zero-filled day-of-month number (01-January, 02-February) |
MM | STRING(3) | Three-character month abbreviation (Jan, Feb) |
MMM | STRING(varies) | Fully spelled month (January, February) |
N | INTEGER | Non-zero-filled minute of hour (1, 2) |
0N | STRING(2) | Zero-filled minute of hour (01, 02) |
Q | INTEGER | Quarter of the year (1) |
STRING(2) | Quarter of the year abbreviation (Q1) | |
QQQ | STRING(varies) | Quarter of the year name (First Quarter) |
S | INTEGER | Non-zero-filled second of minute (1, 2) |
0S | STRING(2) | Zero-filled second of minute (01, 02) |
W | INTEGER | Day of the week number (1-Sunday, 2-Monday) |
WW | STRING(3) | Three-character day-of-week abbreviation (Sun, Mon) |
WWW | STRING(varies) | Fully spelled day-of-week (Sunday, Monday) |
YY | STRING(2) | Two-digit year (99, 00) |
YYYY | INTEGER | Four-digit year (1999, 2000) |
Required. Any expression that returns a date-class datatype. Examples of date expressions are columns or functions that return a date-class datatype. The date_class datatypes are any of the date or time oriented datatypes found in the list of Omnidex datatypes.
> select birthdate, extract(month from birthdate) mon from individuals; BIRTHDATE MON ------------ ----------- 1938-07-14 7 1957-11-22 11 1960-07-28 7 1929-08-22 8 1933-07-09 7 1944-08-01 8 2004-09-14 9
> select birthdate, extract ('MMM D, YYYY' from birthdate) bday from individuals; BIRTHDATE BDAY ------------ ------------------- 1938-07-14 July 14, 1938 1957-11-22 November 22, 1957 1960-07-28 July 28, 1960 1929-08-22 August 22, 1929 1933-07-09 July 9, 1933 1944-08-01 August 1, 1944 2004-09-14 September 14, 2004
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