In a relational database tables are logically linked to each other by a
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In a relational database tables are logically linked to each other by a KEY.
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Answer:
The database tables are linked by a key
Explanation:
Keys are the important part of the relational database model. They are used to identify the relationship between the tables and uniquely identify the data from the tables.
In an application huge number of tables required to store the huge number of data the different tables are related to each other. There may be a duplication of the data in a table. To avoid this we use the concept of keys.
There are different types of keys, they are:
- Primary key
- Foreign key
- Candidate key
- Composite key
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