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In a data base the primary key field is used to?
uniquely identify a record
What does the primary key in a data base do?
We know that primary key is the one that is not null and is always unique. A primary key uniquely identifies a record in a table.
Does a primary key maps an entire database?
yes a primary key can map the whole data base because if we take the example of any employee table in which ssn is the primary key with the help of this key we can determine that employee name and where he works on & which post ,his or her post,department no,location etc. so i think it can be true.
Does a primary key have to be an integer in an Access database?
No, it does not. A primary key can be different types of data, not just an integer.
What are the properties of primary key?
data cannot be repeated
How can a primary key be useful in controlling data redundancy?
controlling data redundancy
What is the primary key field of a database?
its a unique key use to identify data in database
How can you apply the primary key?
Primary key is the one which is uniquely defined in the attributes of a table. It can be used to pull any kind of data regarding a particular tuple in the table. PRIMARY IS ALSO A CANDIDATE KEY.
Does the data in a primary key field common to all records?
Yes
primary key?
attribute of an entity which uniquely identifies a specific instance of the data
What specifies the kind of data a field can contain and how the field is used?
primary key
What is a primary key what is its purpose and why do you use it?
A primary key is a unique identifier for each record in a database table. Its purpose is to ensure the uniqueness and integrity of the data within the table. It is used to uniquely identify each row, which allows for efficient data retrieval and modification, as well as establishing relationships between tables through foreign keys.
