A database in SQL Server is made up of a collection of tables that stores a specific set of structured data. SQL is the standard language for dealing with Relational Databases. However, a common, standardized query language for property graphs (like SQL for relational database systems) is missing. SQL is a standard language for accessing and manipulating databases. SQL is used to communicate with a database. SQL - Overview - SQL is a language to operate databases; it includes database creation, deletion, fetching rows, modifying rows, etc.