floor Function (XQuery)
Returns the largest number with no fraction part that is not greater than the value of its argument. If the argument is an empty sequence, it returns the empty sequence.
If the type of $arg is one of the three numeric base types, xs:float, xs:double, or xs:decimal, the return type is same as the $arg type. If the type of $arg is a type that is derived from one of the numeric types, the return type is the base numeric type.
If input to the fn:floor, fn:ceiling, or fn:round functions is xdt:untypedAtomic, untyped data, it is implicitly cast to xs:double. Any other type generates a static error.
This topic provides XQuery examples against XML instances that are stored in various xml type columns in the AdventureWorks sample database. For an overview of each of these columns, see xml Data Type Representation in the AdventureWorks Database.
You can use the working sample in the ceiling function (XQuery) for the floor() XQuery function. All you have to do is replace the ceiling() function in the query with the floor() function.