Full SQL is a Structured Query Language.
What is SQL
SQL is a query language that is used to manipulate the relational database.
A database consists of rows and columns just like Microsoft Excel which is used to store information about any person, company, object or it can be anything.
SQL is used to add, remove, and find data in the relational database.
The advantage of SQL is, it is simple to learn and easy to write programs with. Extremely fast compared to excel.