Common use of HOW IT WORKS Clause in Contracts

HOW IT WORKS. In a SQL statement, a string preceded by a colon (like :State in the example) represents a parameter. At design time, Delphi recognizes parameters and displays them in the Define Parameters dialog box. Then at run time, it assigns the specified values to the corresponding parameters. You can assign values to query parameters at run time using the Params property. It stores parameter values in an array, where an index of 0 represents the first parameter, an index of 1 represents the second parameter, and so on. So, this statement assigns the value HI to the first parameter.