IQRA MBBS

  Here are some commonly asked SQL interview questions along with their sample answers:   Q: What is SQL? A: SQL (Structured Query Language) is a programming language used for managing and manipulating relational databases. It is widely used for tasks such as retrieving data, inserting, updating, and deleting records, creating database schemas, and performing various data manipulation operations.   Q: What is a primary key in SQL? A: A primary key is a column or a combination of columns in a table that uniquely identifies each record in the table. It ensures data integrity by enforcing uniqueness and providing a reference point for relationships with other tables.   Q: What is the difference between SQL and MySQL? A: SQL is a standard language used for managing relational databases, while MySQL is an open-source relational database management system (RDBMS) that uses SQL as its language. In other words, SQL is a language, while MySQL is a software i...