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# ADO Parameter Object * * * ## Parameter Object The ADO Parameter object provides information about a single parameter used in a stored procedure or query. A Parameter object is added to the Parameters collection when it is created. The Parameters collection is associated with a specific Command object, which uses this collection to pass parameters in and out of stored procedures and queries. Parameters are used to create parameterized commands. These commands (after they have been defined and stored) use parameters to change certain details of the command before its execution. For example, an SQL SELECT statement can use a parameter to define the matching condition of the WHERE clause, and another parameter to define the column name for the SORT BY clause. There are four types of parameters: input parameters, output parameters, input/output parameters, and return parameters. ### Syntax objectname.property objectname.method ## Properties | Property | Description | | --- | --- | | Attributes | Sets or returns the attributes of a Parameter object. | | Direction | Sets or returns how a parameter is passed to or from a stored procedure. | | Name | Sets or returns the name of a Parameter object. | | NumericScale | Sets or returns the number of digits to the right of the decimal point for a numeric value in a Parameter object. | | Precision | Sets or returns the maximum number of digits allowed when representing a numeric value in a parameter. | | Size | Sets or returns the maximum size (in bytes or characters) of the value in a Parameter object. | | Type | Sets or returns the type of a Parameter object. | | Value | Sets or returns the value of a Parameter object. | ## Methods | Method | Description | | --- | --- | | AppendChunk | Appends long binary or character data to a Parameter object. | | Delete | Deletes an object from the Parameters collection. |