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Chapter 4. Understanding and Implementin... > The Multi-Pass Reporting Process of ...

The Multi-Pass Reporting Process of the Crystal Reports Engine

Despite all the Crystal Reports functionality covered, to this point, it would be understandable if you assumed that the Crystal Reports reporting engine provides all this power with a single pass through the data it retrieves from the database. This would be a faulty assumption—Crystal Reports actually uses a three-pass reporting methodology to generate reports. Understanding the multi-pass nature of the reporting engine can facilitate effective report design and expedite the debugging of potential reporting challenges. Figure 4.25 from the Crystal Reports online Help file provides a good starting point for understanding the different passes through the data that Crystal Reports makes and what is calculated on each pass.

Figure 4.25. Understanding the Crystal Reports Multi-Pass report engine flow can help in creating and debugging Crystal Reports.



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