Top SQL interview Questions
Top SQL Interview Questions. When preparing for a SQL (Structured Query Language) interview, it is critical to be well-versed in database concepts, SQL syntax, and the ability to write complicated queries. Top SQL interview questions covering a variety of areas are listed below: 1. What is SQL, and what is its use? Explain the purpose of SQL and its role in managing and manipulating relational databases. 2. Differentiate between SQL and NoSQL databases. Discuss the key differences between SQL (relational) and NoSQL (non-relational) databases. 3. Explain the primary key in a database. Define what a primary key is and its importance in a relational database. 4. What is a foreign key? Describe the concept of a foreign key and its role in establishing relationships between tables. 5. What is normalization? Define normalization and explain its importance in database design. 6. What is denormalization? Explain the concept of denormalization and when it might be used. 7. What are indexes...