Calculates a date value by adding weeks to (or subtracting weeks from) a specified date value.
|date||a date, or an expression that evaluates to a DATE data type|
|number||a number, or an expression that evaluates to a number|
Number, representing a DATE value.
Use $addweeks to perform arithmetic with date values. The $addweeks function calculates a date value by adding a number representing weeks to a date value. If number is negative, the effect is to subtract the weeks from the date.
The + (add) and – (subtract) operators can be used to achieve the same results.
If date or the result of the $addweeks expression is an invalid date (e.g., 19930231), it is adjusted to produce a valid date (e.g., 19930228).
If $Date has the value 19981225, then
Evaluates to 19990101.
Evaluates to 1998.501.
Evaluates to 19980301.