Advanced Union Query Download


Advanced Union Query Download

This advanced union query example shows some interesting and advanced concepts.  Usually in a union query you are selecting the same or similar data from different tables.In this example we selecting the individual data records from the table and at the same time using the union query function to select aggregate functions from the same table.  In this case we are selecting the average, minimum and maximum revenue values grouped by Department.

This aggregate function technique, including countless variations, can be very use when exporting data to other programs such as Excel.  Or perhaps you want to send the revenue data to a website for display.  Using this advanced union query technique allows you to avoid performing these aggregate function calculations either on the website, in a spreadsheet or in an Access report.  Note that if you using Access reports  you’ll need to create a Group on the Department field.  In some cases grouping can conflict in a report and can make the report difficult to program when there are many summary levels.Here are the results of the union query example:

To examine the union query download our Microsoft Access Union Query Database.

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