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Nó tốt hơn để tạo ra một báo cáo với Crystal Reports, và sau đó chạy báo cáo bất cứ khi nào bạn muốn tình trạng mới nhất của các thông tin quan tâm. Bạn có để tạo ra các báo cáo chỉ một lần, nhưng bạn có thể chạy nó nhiều lần, nhận được kết quả mới nhất với mỗi lần chạy kế tiếp. Bạn không cần phải tìm hiểu SQL hoặc bất kỳ phương pháp khác kéo dữ liệu ra khỏi cơ sở dữ liệu. . | 18 Part I Reporting Basics__ For the purposes of this introduction and for now imagine you already know all those things. Starting Crystal Reports 10 You ve probably chosen Crystal Reports because you have a database that contains information that s important to you. In all likelihood the data in that database changes with time and you want to be able to keep up with its current status. You could retrieve the information you want by making SQL queries but that would be too much like work. It s far better to create a report with Crystal Reports and then run the report whenever you want the latest status of the information of interest. You have to create the report only once but you can run it many times getting the latest results with each successive run. You don t have to learn SQL or any other method of pulling data out of databases. Reports created with Crystal Reports are easy to build easy to read and easy to understand. What could be better SQL is the international standard language for communicating with databases. It differs from most common computer languages in that it s nonprocedural. It deals with data a set at a time rather than a record at a time. Database developers use SQL. If you re a database user rather than a developer Crystal Reports may give you everything you need to get what you want out of your databases. The first step to creating a report is to launch Crystal Reports from the Windows Start menu. When you do the Crystal Reports main window appears displaying the dialog box shown in Figure 2-1. Figure 2-1 Welcome to Crystal Reports Chapter 2 Create a Simple Report Right Now 19 You are invited to choose from three options. You can create a Crystal Reports document using Report Wizard or by starting with a blank report. Alternatively as I demonstrate in Chapter 1 you can open a report that already exists either to change it or to run it. Although Report Wizard can be a time- and .
