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Candidate Key is used to uniquely identify the records of a table. An attribute becomes a Primary Key, if all the other candidate keys lose race for being qualified as Primary Key.
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What is the key difference between the federal budget and individual state budgets?
Federal a national budget with funds to support the military, and federal programs. The state budget is only for that state.
Which statement describes a key difference between the American Revolution and the Mexican Revolution?
After the American Revolution, the United States achieved political stability. After the Mexican Revolution, Mexico suffered continued instability.
What are 3 similarities and differences between the US Constitution and the Massachusetts constitution?
I only know 3 differences if that will help. One difference is the dates. The Massachusetts Constitution was written in 1780. The U.S. Constitution was written in 1789. Also, in the Massachussetts Constitution, there are more key points than in the U.S. Constitution. And lastly, the Massachussetts Constitution was written specifically for the people of the United States and the U.S. Constitution was written for the people of the U.S.
The key foreign policymakers are?
The key foreign policy makers are?
Who are 4 key people in constitution?
what is the 4 key people of the constitution?
What is difference between primary candidate and candidate key?
don't ask me I'm trying to find out to but i think it has something to do with the government
Candidate key and primary key differnece?
All Primary keys are definitely Candidate Keys. A Candidate key is one which can be used as a Primary key that is not null and unique. That is one of the candidate keys can be chosen as a primary key.A Candidate key is a Unique Key and it can be used to find out any particular Tuple (row) in a table. The following are the differences between A Candidate key and a Primary Key: 1) A Unique key can be null but not a Primary key 2) On a table we can have only 1 primary key but 'N' number of unique keys.
What is the difference between primary key and secondary key in database?
A primary key is a unique identifier for each record in a database table and is used to ensure data integrity and enforce entity integrity. A secondary key, also known as a candidate key, is an alternate unique key that can be used to identify records, but is not designated as the primary key.
What is candidate key in dbms?
more than one primary key to identify the record uniquely is called candidate key.
Why do you designate one of the candidate key of relation to be the primary key?
We designate one of the candidate key of a relation to be a primary key because that primary key is use for any foreign key references.
What is the difference between candidate key and primary key with example?
Any group of keys or columns (may be one or more than one) which can be used to uniquely refer to any row is together called as candidate key.A primary key only one column name which can be used to uniquely refer any row.there is no much difference b/w these two except the number of columns in consideration.
What is the difference between a Primary Key and a Secondary Key?
A Primary Key is a unique identifier for each record in a database table and is used to enforce entity integrity. A Secondary Key is a non-unique index that is used for querying and organizing data efficiently but does not have the constraint of uniqueness.
What is the difference between primary key and secondary key?
There is two difference between them. 1. The not null constraint is by default added to primary key, it means, primary key attribute cannot accept null values, whereas, the attribute declared as unique can accept null values. It is the major difference between the two. 2. Secondly, we can have only one primary key in a relation, whereas, multiple attributes can be declared unique at the same time.
How many types of key used in SQL Server.Difference between them all?
there are 5 types of keys.those are primary,foriegn,super,candidate and unique key
Difference between a super key and a candidate key?
Different set of attributes which are able to identify any row in the database is known as super key. And minimal super key is termed as candidate key i.e. among set of super keys one with minimum number of attributes. Primary key could be any key which is able to identify a specific row in database in a unique manner.
What is the difference between primary key and unique index?
Primary key is a type of unique index with no null constraint on the columns involved. There can only be one Primary key whereas you can create other unique indexes on the table.
What the differences between primary key and foreign key?
A primary key is a unique identifier for a record in a table and ensures each record is uniquely identified. A foreign key establishes a relationship between two tables by referencing the primary key in another table. It enforces referential integrity by ensuring that the values in the foreign key column correspond to values in the primary key column of another table.
