Friday, December 11, 2009

Crystal reports and Database Server


Crtstal Reports


Crystal Reports is a business intelligence application used to design and generate reports from a wide range of data sources. Several other applications, such as Microsoft Visual Studio, bundle an OEM version of Crystal Reports as a general purpose reporting tool. Crystal Reports became the defacto report writer when Microsoft released it with Visual Basic.

Users install Crystal Reports on a computer and use it to select specific rows and columns from a table of compatible data (see "Supported data sources" below). Users can then arrange the data on the report in the format needed.

Once the report layout is complete it is saved as a file with the extension RPT. A report can be rerun anytime by reopening the RPT file and 'refreshing' the data. If the source data has been updated then the refreshed report will reflect those updates.

The report can then be previewed on the screen, printed onto paper or exported to one of several different file formats such as PDF, Excel, text or CSV.

Report formats can vary from a simple column of values to layouts featuring pie charts, bar charts, cross-tab summary tables and nested subreports. Crystal Reports is designed for "presentation quality" reports so there are many options for enhanced formatting.

The users who design the reports can run them as needed from within the report designer. When running reports directly within the report designer the user has the ability to change any feature of the report. The user can also create variations of the report by saving the modified RPT file under another name.

It is also possible to run a Crystal Report without using the full Crystal Reports designer software. These alternate methods for running reports include locally installed viewers, schedulers, and report distribution tools.

These are typically third-party software programs (independent of Business Objects) that allow you to open, refresh, preview, print and export an RPT file. In 2007 Business Objects released their own viewer, Crystal Reports Viewer XI, but unlike the independent viewers it does not allow the user to refresh the report, but only to view static data saved in the RPT file.

Some of the independent viewers add other capabilities such as allowing the user to schedule a report to run automatically at certain times. Still others allow reports to be burst and/or distributed via Email.

Crystal reports is bundled with a set of ActiveX controls that, when embedded in a simple GUI, can provide an alternative user interface. These same controls allow reports to be deconstructed into their base objects. This, in turn, allows the same reports to be generated at run time, customizing them as necessary. Database Server

The PeopleSoft database is the repository for all information managed by PeopleSoft applications. Not only is application data stored in the database, but PeopleSoft metadata is also maintained in the database.

PeopleSoft Application Designer enables you to define and maintain this metadata that the system uses to drive the run-time architecture. The application server executes business logic based on the PeopleSoft metadata.

At execution time, the application server fetches the most recent application object definitions from the metadata repository, compiles and caches the application object into memory, and executes the business rules based on the definition.

PeopleSoft Enterprise Portal 8.x currently runs on the following relational database management system (RDBMS) products:

*Microsoft SQL Server for Windows NT/2000.
*Oracle for Solaris, HP-UX, AIX, Tru64 Unix, and Windows NT/2000.
*DB2/UDB for OS/390, AIX, Solaris, HP-UX, and Windows NT.

Note. PeopleSoft Enterprise Portal 8.x can retrieve content from PeopleSoft applications that are running on other RDBMS products, such as Sybase or Informix.

In general, PeopleSoft Enterprise Portal 8.x can retrieve content from any RDBMS-based application as long as the content that is being retrieved is URL-accessible and is HTML-based.



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