Welcome to sql-notes-and-practice — a complete, beginner-to-advanced SQL learning roadmap broken down into 35 days of structured, practical, and real-world practice. Whether you're preparing for SQL ...

1970 − Dr. Edgar F. "Ted" Codd of IBM is known as the father of relational databases. He described a relational model for databases. 1974 − Structured Query Language appeared. 1978 − IBM worked to ...