Data type of the parameter.
Source position: db.pas line 1493
|  published property TParam.DataType : TFieldType | 
DataType is the current data type of the parameter value. It is set automatically when one of the various AsXYZ properties is written, or when the value is copied from a field value.
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 | Is the parameter empty. | |
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 | Value as a variant. | |
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 | Copy value from field instance. |