Top 20 Questions of Structure Query Language(SQL)
SQL (Structured Query Language) is the standard language used to interact with relational databases. It allows users to create, retrieve, update, and delete data using simple, declarative commands. SQL supports data manipulation (DML), data definition (DDL), and data control (DCL) operations. It is widely used in applications, data analysis, and backend development due to its efficiency and simplicity. Popular databases like MySQL, PostgreSQL, Oracle, and SQL Server all use SQL . Below are the Top 20 Questions For the Interview Preparation:- 1. What is the difference between DBMS and RDBMS? Answer: DBMS stores data in files or simple structures, and doesn't support relationships among data. RDBMS stores data in tables and uses keys to relate data across tables. It also enforces ACID properties for reliability and supports complex queries using SQL. 2. What is normalization? Why is it important? Answer: Normalization is the process of organizing data to minimize redund...