Is there difference between MySQL and SQL?

Answer 1

Yes, there is a difference:
1. MySQL is a database product owned and maintained by Oracle (formerly by SUN), provided in an open source and a commercial version
2. SQL (Structured Query Language) is the query language for relational databases. DB companies like e.g. Oracle, IBM, Microsoft normally follow the ANSI SQL standards but also implemented their own "dialects" and specific syntax