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dev:sql:functions:current_date [2010/07/09 02:49] tdo |
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| - | <html><div align="center"><span style="color:red">DRAFT</span></div></html> | ||
| - | ====== Omnidex SQL Function: CURRENT_DATE ====== | ||
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| + | ====== Omnidex SQL Function: CURRENT_DATE ====== | ||
| ===== Description ===== | ===== Description ===== | ||
| - | The CURRENT_DATE function returns the current date from the server's time-of-day clock. | + | The CURRENT_DATE function returns the current date from the server's time-of-day clock. The function is processed once at the beginning of the execution of the SQL statement. A new value is not obtained with each reference or with each fetched row. In a client-server or Omnidex Grid application, the date returned is from the individual server processing the query. |
| - | The function is processed once at the beginning of the execution of the SQL statement. A new value is not obtained with each reference or with each fetched row. | + | This function returns an ANSI DATE datatype. |
| + | ===== Syntax ===== | ||
| + | $DATA_LENGTH ( column ) | ||
| - | If the function is called within an application in a networked environment, the time returned is from the server with the Omnidex Environment. | + | == column == |
| - | This function returns an ANSI DATE datatype. | + | Required. The name of a column, qualified by the table and database as needed. |
| - | ===== Syntax ===== | ||
| - | CURRENT_DATE | ||
| ===== Examples ===== | ===== Examples ===== | ||
| - | ==== Example 1 ==== | + | ==== Example 1: Column ==== |
| + | <code> | ||
| + | > select current_date from $omnidex; | ||
| + | |||
| + | CURRENT_DATE | ||
| + | ------------ | ||
| + | 2010-07-28 | ||
| + | |||
| + | </code> | ||
| + | ==== Example 2: Expression calculating age ==== | ||
| <code> | <code> | ||
| - | select company, | + | > select birthdate, $compare_dates(birthdate, current_date, 'YY') age from individuals; |
| - | current_date | + | |
| - | from customers | + | |
| - | where company='dynamic' | + | |
| - | ... | + | BIRTHDATE AGE |
| - | Dynamic Information Systems Corporation, 2004-03-15 | + | ------------ ----------- |
| + | 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> | </code> | ||
| + | |||
| + | ====== Additional Resources ====== | ||
| + | |||
| + | See also: | ||
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