0
The "primary key" is the identifier that database systems use to identify a record uniquely.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is a common field in database?
A common field in a database is the "primary key". It is a unique identifier for each record in a database table and is used to uniquely identify each row. It is typically a numerical value or a combination of values that ensures each record is distinct from all others.
What is a primary field in ict?
In ICT, a primary field refers to the main data field in a database that is used to uniquely identify each record in the database. This field is usually designated as the primary key. It helps to ensure data integrity and consistency within the database by providing a unique identifier for each record.
What is the row in a database?
In a database, a row is a single record or entry that contains information organized in fields or columns. Each row represents a unique set of data related to a specific entity or object in the database tables.
What the difference between primary key and scendary key?
A primary key is a unique identifier for a record in a database table and is used to ensure each record is uniquely identifiable. A secondary key is a key used for sorting and indexing purposes, but can have duplicate values within a table.
What is the field that uniquely identifies each record in a table?
Primary key is the field that uniquely identifies each record in a table. It ensures that each record in a table is unique, and helps to establish relationships between tables in a database.
What is a field that has a unique value for each record in a database?
Primary key
What is a fullform of PK?
PK can stand for Primary Key in database management, indicating a unique identifier for each record in a database table.
Why is it necessary to set a unique identifier for student table?
All tables need to have individual identifiers that are unique. That way we can identify each student. All students must have some way of being identified so there is no confusion. If you had two students with the same name, they would have different student numbers that would identify them. In any database it is important to be able to individually identify a record. In a database that is done by having a key field. It cannot be left blank and it cannot have the same value more than once, guaranteeing it is unique.
What is a key field do?
If you are referring to a database, the Key Field is a field used to uniquely identify each record. It preserves the order of the original database, before any sorting or rearranging has been done.
What is a record in ict?
Each row in a database is called a record.
What are the properties of relations in database management?
1.each row must have unique(pk)in a relation. 2.database must have a unique name. 3.each column must have unique name.
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.
Which type of database model is similar to a hierarchical database but allows each child record to have more than one parent record?
Network Database
What is typically unique in each database table?
ID number
In a relational database each row is called what?
In a relational database, each row is called a record. It represents a single entity or object, with each column containing specific attributes or properties of that entity. The combination of rows and columns form a table which allows for structured data storage and retrieval.
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.
Why is it necessary to have a primary key for each table of information of your database?
to have unique field
