Relational Database Model Flashcards, test questions and answers

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What is Relational Database Model?

A relational database model is a type of data model that organizes information into one or more tables of columns and rows, with each table containing a set of predefined relationships between the data elements. This type of database model has been in use since the 1970s and is based on the mathematical theory of relational algebra. In this type of model, information is stored in tables, which are then linked together using relationships. This allows for faster retrieval and manipulation than other database models, such as hierarchical or network models.Relational databases have become popular because they are flexible and can store large amounts of data easily. They also allow for more efficient querying techniques than other database models because they allow users to ask questions such as show me all the customers who bought product X last year without having to manually search through each table individually. Additionally, relational databases provide better security measures by allowing administrators to set up user-level privileges so that certain users cannot access certain tables or query certain columns within those tables. Furthermore, relational databases are generally easier to maintain than other types due to their organized structure and built-in features like referential integrity which prevent accidental deletion or modification of records in one table from affecting other related records in another table.Overall, relational databases provide an efficient way for organizations to store large amounts of data while providing better security measures and easier maintenance compared to some other types of databases available today.