All Categories
Alerts
Wishlist
Cart
Sign In
Categories
Current Affairs & GK
Current Affairs
Show All Current Affairs & GK
General Aptitude
Arithmetic Aptitude
Data Interpretation
Show All General Aptitude
General Knowledge
Basic General Knowledge
General Science
Show All General Knowledge
Medical Science
Anatomy
Biochemical Engineering
Biochemistry
Biotechnology
Microbiology
Show All Medical Science
Technical
Database
Digital Electronics
Electronics
Networking
Show All Technical
Verbal and Reasoning
Logical Reasoning
Verbal Ability
Verbal Reasoning
Show All Verbal and Reasoning
›
What is a primary key?
What is a primary key?
Expand All
Collapse All
Practice Questions
1 question
Q1
What is a primary key?
A unique identifier for a record
A foreign key reference
An index for faster searches
A type of relationship
Show Solution
Copy
A primary key is a unique identifier for a record in a database table, ensuring that no two records can have the same key value.
Questions & Step-by-step Solutions
1 item
Q
Q: What is a primary key?
Solution:
A primary key is a unique identifier for a record in a database table, ensuring that no two records can have the same key value.
Steps: 6
Show Steps
Step 1: Understand that a database is like a digital filing cabinet where information is stored in tables.
Step 2: Each table has rows (records) and columns (fields or attributes).
Step 3: A primary key is a special column in a table that holds unique values.
Step 4: The unique values in the primary key column ensure that each record can be identified separately.
Step 5: No two records in the table can have the same primary key value, which prevents confusion.
Step 6: Think of the primary key like a Social Security Number; each person has a unique number that identifies them.
Related Questions
W
What is an API?
Question: What is an API?Options: Application Programming InterfaceApplication Program InterfaceAppl..
W
Which of the following is a front-end framework?
Question: Which of the following is a front-end framework?Options: DjangoFlaskReactSpringCorrect Ans..
W
What is the purpose of an API?
Question: What is the purpose of an API?Options: To create user interfacesTo connect different softw..
W
Which protocol is used for secure communication over the internet?
Question: Which protocol is used for secure communication over the internet?Options: HTTPFTPHTTPSSMT..
W
Which of the following is a type of indexing?
Question: Which of the following is a type of indexing?Options: Clustered IndexNon-Clustered IndexFu..
‹
Biology (School & UG)
Chemistry (School & UG)
Civil Engineering
Commerce & Accountancy
Computer Science & IT
Current Affairs & GK
Data Structures & Algorithms
Electrical & Electronics Engineering
English (School)
General Aptitude
General Knowledge
General Knowledge & Current Affairs
Languages & Literature
Law & Legal Studies
Major Competitive Exams
Mathematics (School)
Mechanical Engineering
Medical Science
Physics (School & Undergraduate)
Quantitative Aptitude & Reasoning
Social Science (School)
Technical
Verbal and Reasoning
Vocational & Skill Development
›
Soulshift Feedback
×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy
?
0
1
2
3
4
5
6
7
8
9
10
Not likely
Very likely
✕
↑
