Hi, Primary Key: Not Null+ unique.but it wont allows null values. U

what is difference between "Primary key" and "Unique key"?

Question Posted / satya_k21

Answer Posted / satya_k21

Hi,

Primary Key: Not Null+ unique.but it wont allows null
values.

Unique: It allows null values , but it should be unique.

Regards,
Satya.k

Is This Answer Correct ?

3 Yes

0 No

Please Help Members By Posting Answers For Below Questions

How do you respond to dementia behavior?

922

Does a join table need a primary key?

901

Why are sql stored procedures used?

987

Any attempt to navigate programmatically to disabled form in a call_form stack is allowed?

1039

What is a null value?

1080

What is left join example?

888

what is sql? : Sql dba

970

What is a dynamic query?

969

Why stored procedure is better than query?

884

What is sql and db2?

938

What is difference between procedure and trigger?

914

What is difference between nchar and nvarchar?

954

How many types of tables are there?

899

Can you have more than one trigger on a table?

939

What do you mean by dbms? What are its different types?

949