Advertisements
Advertisements
प्रश्न
State the following rules of DBMS.
Entity Integrity
थोडक्यात उत्तर
उत्तर
- The entity integrity constraint states that primary key value can't be null.
- This is because the primary key value is used to identify individual rows in relation and if the primary key has a null value, then we can't identify those rows.
- A table can contain a null value other than the primary key field.
Example:
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
What is meant by cell address?
State the significance of the following in DBMS :
(i) Forms
(ii) Reports
List few disadvantages of the file processing system.
What are the ACID properties?
Limitations of a file system can be resolved by ______.
What do you call the database catalogue where DBMS stores database schema along with various constraints?
Constraints are used to ______.
Which is not a limitation of database?
State the following rules of DBMS.
Referential Integrity
Mention the symbol which specifies the fixed columns or rows in a formula.
