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What is a database?

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An organized collection of data, typically stored in electronic format, allowing for quick input and retrieval.

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What is a Database Management System (DBMS)?

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A collection of programs that enables you to enter, organize, and select data in a database.

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What are the types of databases?

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Flat-type, Hierarchical, and Relational.

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What is a flat-type database?

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A simplistic design consisting of two-dimensional tables with rows and columns.

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What is a hierarchical database?

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A design that uses a one-to-many relationship for data elements, structured like a tree.

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What is a relational database?

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A database that can have multiple parents, storing data in tables where new information is automatically added.

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What is normalization in databases?

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A design technique that reduces data redundancy and eliminates undesirable characteristics like insertion, update, and deletion anomalies.

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What is a primary key?

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A unique identifier for a database record that must contain unique values and cannot contain NULL values.

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What is a foreign key?

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A field in one table that links to the primary key in another table, establishing a relationship between the two.

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What is a composite key?

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A primary key consisting of two or more columns used to uniquely identify each row in a table.