Browsing of table contents is one of the most important functions of any information system.
For one and the same table (or a set of tables) various representations can be built in ObjectLand :
It is possible to select any set of table fields for browsing. For example, only addresses (street and building number) and number of building inhabitants of the table “List of Building Certificates” can be displayed or, for example, inventory numbers and dates of last repair.
It is possible to change the order of records in the table. For example, sort rows by addresses or inventory numbers.
When working with table data one of the most widely used operations is search operation – “find and display records which…”. For example, the following examples of such operations can be given for the table “List of Building Certificates”: “find and display certificates of buildings located in Sea Lane”, “find and display certificates of municipal buildings repaired before 1994”.
The method of representing a table in ObjectLand is called a query. Any query is built on the basis of one or several tables. It is possible to create any number of different queries on the basis of one table and assign names to these queries to be able to easily select the necessary method of browsing a table (or tables) in future.
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