Detailed descriptions of functions available within Microsoft Access. Each entry contains the function's purpose, usage, return values, examples and special cases.
The IsErrorfunction returns a value of true if evaluating the expression results in an error value. Otherwise, it returns false.
The IsNumeric function returns a value of true if the referenced variable can be evaluated as a number. Otherwise, it returns false.
The IsNull function returns a value of true if the referenced variable contains no valid data. Otherwise, it returns false.
The IsDate function returns a value of true if the referenced variable is a date or time. Otherwise, it returns false.
The IsArray function returns a value of true if the referenced variable is an array. Otherwise, it returns false.
The IsArray function returns a value of true if the referenced variable is an array. Otherwise, it returns false.
The Int() function returns the integer portion of a given number.
The InStrRev() function returns a number corresponding to the first location of a substring within a string, with the comparison beginning at the end of the searched string.
The InStr() function returns a number corresponding to the first location of a substring within a string.
The ABS() function returns the absolute value of any numeric expression provided to it as an argument.
The Array() function is used to create an array from a comma-delimited list of elements.
The Asc() function is used to obtain the integer value of the first character in a string.
The Atn() function is used to obtain the arctangent value of a number.
The CallByName() function is used to manipulate objects by either executing a method or setting the value of a property.
The Choose() function is used to select an item from a list of arguments.
The Chr() function returns a string containing a character value.
The CurDir() function returns a string containing the current working directory.
The CVErr() function allows the creation of user-defined errors.
The Date() function provides the current system timestamp.
The DateAdd() function allows you to increment a date by a chosen interval.
The DateDiff() function returns the difference between two dates.
The DatePart() function returns the requested piece of a date.
The DateValue() function returns a date variant containing the date corresponding to the input.
The Day() function returns an integer corresponding to the day of the month (1-31) corresponding to the input date.
The DDB() function returns a double value containing the periodic depreciation of an asset using the double-declining balance method (or other method, as specified).
The DateValue() function returns a date variant containing the date corresponding to the input.
The DateValue() function returns a date variant containing the date corresponding to the input.
The FV() function returns the future value of an annuity.
The Hex() function converts a whole number into a string containing its hexadecimal representation.
The Hour() function converts a numeric or string expression containing a time value into an integer between 0 and 23 representing the hour of the day within that time value.
The IIf() function allows the conditional return of different values depending upon whether an expression evaluates to true or false.