Defining Input Fields for Single ValuesSichtbare Länge verkleinern Suchhilfe für Parameter
If you want to enable the user to enter values for single fields on the selection screen, you must define specificvariables (parameters) in the declaration part using the PARAMETERS statement. Each parameter declared with the PARAMETERS statement appears as an input field on the relevant selection screen.
Parameters are used for simple queries of single values. For example, you can use parameters to control the program flow. However, if you want to restrict database accesses or perform complex selections, you should useselection criteria.
You can use the PARAMETERS statement for both standard and user-defined selection screens. The variants of the PARAMETERS statement which are important for program-specific selections are explained in the following sections:
There are special variants of the PARAMETERS statement that you can use to define database-specific selections in logical databases. For more information, see the keywords documentation and the section onLogical Databases. Basic Form of Parameters Dynamic Dictionary Reference Default Values for Parameters SPA/GPA Parameters as Default Values Allowing Parameters to Accept Upper and Lower Case Defining Required Fields Checking Input Values Defining Checkboxes Defining Radio Buttons Hiding Input Fields Modifying Input Fields