How does a relational database store data internally?

Question

A relational database stores data in tables. Tables are organized into columns, and each column stores one type of data (integer, real number, character strings, date, " ). The data for a single "instance" of a table is stored as a row.

How is data stored internally in database?

Databases use a B-tree data structure to store indexes to improve the performance of the database. Data records are stored in a B+tree structure. If no indexing use, only B+tree used to store the data. A cursor is a special pointer which used to point a record( or row) which given with page id and offset.

How do relational databases store records?

The data tables used in a relational database store information about related objects. Each row holds a record with a unique identifier -- known as a key -- and each column contains the attributes of the data. Each record assigns a value to each feature, making relationships between data points easy to identify.

How does a relational database store and retrieve data?

A relational database organizes data into tables which can be linked—or related—based on data common to each. This capability enables you to retrieve an entirely new table from data in one or more tables with a single query.

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