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प्रश्न
State the following rules of DBMS.
Referential Integrity
थोडक्यात उत्तर
उत्तर
- A referential integrity constraint is specified between two tables.
- In the Referential integrity constraints, if a foreign key in Table 1 refers to the Primary Key of Table 2, then every value of the Foreign Key in Table 1 must be null or be available in Table 2.
Example:
shaalaa.com
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संबंधित प्रश्न
State the main advantages of an Action Query.
Define database
List few disadvantages of the file processing system.
Explain on Evolution of DBMS.
How is a top to bottom relationship among the items in a database established?
What is the full form of DBMS?
What is not a DBMS?
A database ______ certain details about how data is actually stored and maintained.
______ 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.
