Microsoft KB Archive/103252

= ACC: Query with Parameters to Evaluate Complex Criteria =

Article ID: 103252

Article Last Modified on 1/18/2007

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APPLIES TO


 * Microsoft Access 1.0 Standard Edition
 * Microsoft Access 1.1 Standard Edition
 * Microsoft Access 2.0 Standard Edition
 * Microsoft Access 95 Standard Edition
 * Microsoft Access 97 Standard Edition

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This article was previously published under Q103252



Moderate: Requires basic macro, coding, and interoperability skills.



SUMMARY
In Microsoft Access, you can use variable parameters in queries. This article discusses how to construct a query that requires more than one prompt. Each parameter can be used both as criteria and as a field to allow complicated evaluation of the value entered in each parameter.



MORE INFORMATION
The following parameter query is based on the Orders table in the sample database Northwind.mdb (or NWIND.MDB in earlier versions). It selects orders written between two variable dates provided by the user.

If either the Start Date or the End Date is not entered, the query returns all dates greater than or equal to the Start Date, or less than or equal to the End Date. If neither a Start Date nor an End Date is entered, the query returns all orders.

 Open the sample database Northwind.mdb (or NWIND.MDB in earlier versions). Create a new query based on the Orders table.  Enter the following query:      Query: FindOrdersByDate ---     Field: OrderID Show: Yes Field: OrderDate Sort: Ascending Show: Yes First Criteria Line: Between [Start Date] and [End Date] Second Criteria Line: <=[End Date] Third Criteria Line: >=[Start Date] Field: [Start Date] Show: No        First Criteria Line: Is Not Null Second Criteria Line: Is Null Third Criteria Line: Is Not Null Fourth Criteria Line: Is Null Field: [End Date] Show: No        First Criteria Line: Is Not Null Second Criteria Line: Is Not Null Third Criteria Line: Is Null Fourth Criteria Line: Is Null   On the Query menu, click Parameters. In the Query Parameters box add two entries, one for each parameter in the query, as follows:      Query Parameters ---     Parameter: Start Date Data Type: Date/Time Parameter: End Date Data Type: Date/Time  To run the query, on the View menu, click Datasheet. Microsoft Access will prompt you for the value of the parameters and will substitute the proper values in the query.</li></ol>

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