What is a constraint. Types of constraints ?
- 5 Answers
- 24729 Views
- Accenture, BirlaSoft, I also Faced
- E-Mail Answers
Answer Posted / sujit.1551
constraint are nothing but a conditions,in other words
enforcing the business rules into the database.
types of constraits:
1)check constraint
2)unique constraint
3)primary key
4)foreign key
5)Not null
6)Default
| Is This Answer Correct ? | 20 Yes | 3 No |
Post New Answer View All Answers
What are the dml statements?
Can we call dml statement in function?
what is the syntax for using sql_variant_property? : Transact sql
Explain about various levels of constraint.
What is Collation Sensitivity ? What are the various type ?
What is memory optimized table?
What is primary key and unique key?
What is the difference between having and a where in sql?
Why do we use sqlite?
What is varchar used for?
How to know the last executed procedure?
How many scalar data types are supported in pl/sql?
Explain the difference between sql and mysql.
Does inner join remove duplicates?
What is multiple columns?
