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प्रश्न
What is a relationship in databases? List its types.
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उत्तर
There exists a relationship between two tables when the foreign key of one table references the primary key of other tables.
The Entity-Relationship(ER) diagram is based on the three types listed below.
- One-to-One relationship
- One-to-Many relationship
- Many-to-Many relationship
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संबंधित प्रश्न
Queries are used to ____________ information from database.
What is the difference between the Select and Project commands?
The ______ diagram gives a logical structure of the database graphically?
What are the ACID properties?
Limitations of a file system can be resolved by ______.
Users can work on DBMS using ______.
______ is known as skeleton of database.
Give the term for the following:
DBMS creates a file that contains a description of the data stored in the database.
State the following rules of DBMS.
Entity Integrity
Mention the symbol which specifies the fixed columns or rows in a formula.
