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dev:sql:functions:extract [2010/07/27 05:06] els |
dev:sql:functions:extract [2016/06/28 22:38] (current) |
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| This function returns a different datatype based on the requested field value. | This function returns a different datatype based on the requested field value. | ||
| - | |||
| ===== Syntax ===== | ===== Syntax ===== | ||
| - | EXTRACT(date_units FROM date_column) | + | EXTRACT(date_tokens FROM date_expression) |
| - | == date_units == | + | == date_tokens == |
| - | Required. The portions of date to be extracted, as determined by one or more of the strings shown in the table below. | + | 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. |
| + | {{page>dev:appendix:reference:date_tokens_insert&noheader&nofooter&noeditbtn}} | ||
| - | Valid //date_unit// options: | ||
| - | ^ Date_unit ^ 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 | C STRING(2) | Returns Lowercase am/pm indicator. | | ||
| - | | AA | C STRING(2) | Uppercase AM/PM indicator. | | ||
| - | | D | INTEGER | Returns numeric Day of the Month (1 to 31). | | ||
| - | | 0D | C STRING(2) | Zero-filled day-of-month (01, 02, 03) | | ||
| - | | DD | INTEGER | Day of year in one, two or three digit format. | | ||
| - | | 0DD | C STRING(3) | Zero-filled day of year (044) | | ||
| - | | F | INTEGER | Non-zero-filled fraction of a second (1, 2) | | ||
| - | | 0F | C STRING(2) | Zero-filled fraction of a second (01, 02) | | ||
| - | | H | INTEGER | 12-hour, non-zero-filled hour of day (12, 1) | | ||
| - | | 0H | C 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 | C STRING(11) | Zero-filled Julian date (01, 02) | | ||
| - | | M | INTEGER | Non-zero-filled month number (1-January, 2-February) | | ||
| - | | 0M | C STRING(2) | Zero-filled day-of-month number (01-January, 02-February) | | ||
| - | | MM | C STRING(3) | Three-character month abbreviation (Jan, Feb) | | ||
| - | | MMM | C STRING(varies) |Fully spelled month (January, February) | | ||
| - | | N | INTEGER | Non-zero-filled minute of hour (1, 2) | | ||
| - | | 0N | C STRING(2) | Zero-filled minute of hour (01, 02) | | ||
| - | | Q | INTEGER | Quarter of the year (1) | | ||
| - | | QQ | C STRING(2) | Quarter of the year abbreviation (Q1) | | ||
| - | | QQQ | C STRING(varies) | Quarter of the year name (First Quarter) | | ||
| - | | S | INTEGER | Non-zero-filled second of minute (1, 2) | | ||
| - | | 0S | C STRING(2) | Zero-filled second of minute (01, 02) | | ||
| - | | W | INTEGER | Day of the week number (1-Sunday, 2-Monday) | | ||
| - | | WW | C STRING(3) | Three-character day-of-week abbreviation (Sun, Mon) | | ||
| - | | WWW | C STRING(varies) | Fully spelled day-of-week (Sunday, Monday) | | ||
| - | | YY | C STRING(2) | Two-digit year (99, 00) | | ||
| - | | YYYY | INTEGER | Four-digit year (1999, 2000) | | ||
| - | == date_column == | + | == date_expression == |
| - | Required. A column of date_class datatype. The date_class datatypes are any of the date or time oriented datatypes found in the list of [[dev:appendix:datatypes|Omnidex datatypes]]. | + | 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 [[dev:appendix:reference:datatypes|Omnidex datatypes]]. |
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| 2004-09-14 9 | 2004-09-14 9 | ||
| </code> | </code> | ||
| - | + | ==== Example 2: EXTRACT with format string ==== | |
| - | ==== Example 2: $RANDOM with a seed ==== | + | |
| <code> | <code> | ||
| - | > select $random(12345) rnd from $omnidex; | + | > select birthdate, extract ('MMM D, YYYY' from birthdate) bday from individuals; |
| - | RND | + | BIRTHDATE BDAY |
| - | ----------- | + | ------------ ------------------- |
| - | 1255939488 | + | 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 | ||
| </code> | </code> | ||
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| See also: | See also: | ||
| - | {{page>dev:sql:functions:see_also_date&noheader&nofooter&noeditbtn}} | + | {{page>dev:sql:functions:see_also_dates&noheader&nofooter&noeditbtn}} |
| - | |||
| - | {{page>:bottom_add&nofooter&noeditbtn}} | ||
| - | |||
| - | |||
| - | ### | ||
| - | |||
| - | ===== Example ===== | ||
| - | |||
| - | <code> | ||
| - | select status, | ||
| - | extract(mmm FROM orders.order_date) | ||
| - | from orders | ||
| - | where product_no='PRN4356' | ||
| - | |||
| - | ORDR JANUARY | ||
| - | ORDR DECEMBER | ||
| - | CNCL MARCH | ||
| - | </code> | ||
| {{page>:bottom_add&nofooter&noeditbtn}} | {{page>:bottom_add&nofooter&noeditbtn}} | ||