ADO Parameter Object
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ADO Parameter Object
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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 the
Collection to pass parameters in and out of stored procedures and queries.
Parameters can be used to create Parameterized Commands. These commands are (after they have been
defined and stored) using parameters to alter some details of the command before it is executed.
For example, an SQL SELECT statement could use a parameter to define the
criteria of a WHERE 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
procedure |
| Name | Sets or returns the name of a Parameter
object |
| NumericScale | Sets or returns the number of digits stored to the right
side of the decimal point for a numeric value of a Parameter object |
| Precision | Sets or returns the maximum number of digits allowed when
representing numeric values in a Parameter |
| Size | Sets or returns the maximum size in bytes or characters of
a 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 |
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