Treffer: DATA SETS (BASIC 2008).

The most important thing to know about data sets is the fact that they are organizes into tables. Every single table contains rows and columns, also called information fields. Every row/line within a table has the name of record. The data that are organized in such manner (into independent tables) are relational data. The software application used for arranging data in such way is called relational database. SQL (Structured Query Language - programming language for querying) is the most frequently utilized programming language, being used for the retrieval and management of data stored in relational databases. The Visual Basic controls for databases play a significant role in establishing the connections between applications and data. Every table contains a primary key, which is used for the unique identifying of database's recordings. In other words, the value of a primary key within a table can not be duplicated throughout the recording processes. For instance, a primary key could stand for a personal identification number, an e-mail address or another unique identifier (the persons' names are not usually chosen as primary keys because there might be the possibility of a repetition). [ABSTRACT FROM AUTHOR]

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