![]() Define: primary key, Foreign key, Candidate key, Super key.Īns. ![]() These allow only authorised users to access the database.ģ. There are user logins required before accessing a database and various access specifiers. Security of data: Database have various methods to ensure security of data. This means that the information available in a database is guaranteed to be correct in most cases.Įasy to update data: In a database, it is easy to update data using various Data Manipulation languages (DML) available. This would not be possible using any other tool such as a spreadsheet as they would simply not work.Īccurate: A database is pretty accurate as it has all sorts of build in constraints, checks etc. Manages large amounts of data: A database stores and manages a large amount of data on a daily basis. The various reasons a database is important are : In a database, dada is organised in such a way that it can be easily accessed and managed.Īns. A database is a systematic collection of structured information or data, typically stored electronically in a computer system. (e) _ allows you to add and update data in a table, one record at a time.Īns. (b) A candidate key is called _ key, if it is not designated as primary key. (a) In _ database data are stored in multiple tables to remove redundancy.
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