primary key : primary key dose not except null value unique key : it acce

What is differance unique key and primary key.

Question Posted / rahul khanke

Answer Posted / rahul khanke

primary key : primary key dose not except null value
unique key : it accept null values.. if it set to not null
then it as good as primary key.

Is This Answer Correct ?

5 Yes

0 No

Please Help Members By Posting Answers For Below Questions

what are all the different types of indexes? : Sql dba

1054

What is meant by temporal data?

979

What is a full join?

997

Explain the steps needed to create the scheduled job?

1045

What are the three forms of normalization?

1050

how many values can the set function of mysql take? : Sql dba

997

Which one is faster ienumerable or iqueryable?

945

What are sql ddl commands?

1101

list out some tools through which we can draw e-r diagrams for mysql. : Sql dba

974

What is assignment operator in pl sql?

1046

What does truncate mean in sql?

1035

What are different types of statements supported by sql?

1172

What are procedures used for?

992

What is string join?

982

What is sql used for?

1129