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| - | ====== Omnidex SQL Function: $COMPARE_DATES ====== | ||
| - | ===== Description ===== | ||
| - | The $COMPARE_DATES function compares two date expression and returns the difference. The arithmetic is performed using the units declared in the function, or using days if not specified. | ||
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| - | This function returns an INTEGER datatype. | ||
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| - | ===== Syntax ===== | ||
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| - | $COMPARE_DATE( date_expression_1, date_expression_2 [ , date_token ] ) | ||
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| - | == date_expression_1 and date_expression_2 == | ||
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| - | 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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| - | == date_token == | ||
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| - | Optional. One of the following tokens representing the unit for the date arithmetic. | ||
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| - | ===== Example ===== | ||
| - | ==== Example 1: $COMPARE_DATES calculating age ==== | ||
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| - | <code> | ||
| - | > select birthdate, $compare_dates(birthdate, current_date, 'YY') age from individuals; | ||
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| - | BIRTHDATE AGE | ||
| - | ------------ ----------- | ||
| - | 1938-07-14 72 | ||
| - | 1957-11-22 53 | ||
| - | 1960-07-28 50 | ||
| - | 1929-08-22 81 | ||
| - | 1933-07-09 77 | ||
| - | 1944-08-01 66 | ||
| - | 2004-09-14 6 | ||
| - | </code> | ||
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| - | ====== Additional Resources ====== | ||
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| - | See also: | ||
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