answersLogoWhite

0


Best Answer

why there is no answer yet

User Avatar

Wiki User

10y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Can Super key be null
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Can super key have null value?

No they can not


Can a foreign key be null?

yes .a foreign key can have null values


What are the differences between super key primary key candidate key and foreign key?

Super key: A set of attributes that uniquely identifies a tuple in a table. Primary key: A specific super key chosen to uniquely identify each tuple in a table and must be unique and not null. Candidate key: Any super key that could be chosen as the primary key. Foreign key: A field in a table that is a primary key in another table, used to establish a relationship between the two tables.


What is a primary key that is null?

Unique key


What not a likely primary key?

A field that is not unique and null can not be used as a primary key. Praimary key must satisfy the conditions of not null and unique.


Have foreign keys null values?

Yes Foreign key can have null value.


Does primary key allow null?

No


Can a primary key have a blank or null value entered into its cell?

No. A Primary Key is the Unique identifier and cannot be null and cannot be duplicate.


How you create or assign primary key?

A primary key is never null and is also unique . Example of primary key is create table emp (ecode integer NOT NULL PRIMARY KEY);


Can the foreign key accept null?

yes


What are the advantage of primary key?

Primary key that is used to identify a record uniquely. Primary key is a key that always unique and not null. A system generated primary key is called surrogate key.Primary key is the one which is always unique and not null. Advantage of primary key that it helps in identifying a tuple uniquely.


Where you can get key to null woozworld?

Simple, u lock a unitz buy keys trade a newbie cause they might not know it, then add something rich and remove it, add the key it says key to null.