Adaptive Practice
Databases
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Question 1 of 10
⏱ 0:30
Easy
What is the primary purpose of a database?
Easy
Which of the following is a type of database model?
Medium
In a relational database, what does a 'primary key' do?
Easy
Which SQL command is used to retrieve data from a database?
Medium
What does 'normalization' in databases aim to achieve?
Medium
Consider a table 'Students' with columns: StudentID (Primary Key), Name, and Age. Which SQL query will correctly add a new student record?
Medium
In the context of databases, what is a 'foreign key'?
Hard
Which of the following is NOT a characteristic of a relational database?
Medium
What is the result of the following SQL query? SELECT COUNT(*) FROM Students WHERE Age > 18;
Hard
Which normal form eliminates transitive dependency in a database table?