Q1: What is query optimization, and why is it important?Answer:Query optimization is the process of improving the performance of SQL queries by minimizing resource usage, such as CPU and memory. It is important because inefficient queries can lead to slow performance, especially when handling large datasets. Q2: What is an…
Q1: What is a CROSS JOIN, and when would you use it?Answer:A CROSS JOIN returns the Cartesian product of two tables, meaning it pairs each row of the first table with every row of the second table. It’s useful when you need every combination of two tables but should be…
Q1: What is SQL, and what are its primary functions?Answer:SQL (Structured Query Language) is a domain-specific language used to manage and manipulate relational databases. It is used to perform tasks such as querying data, updating records, inserting data, and deleting records. SQL is essential for interacting with databases, and its…