Structured query language (SQL) is a standard database query language designed by IBM.
Structured Query Language (SQL) is a nonprocedural language that deals exclusively with data: data integrity, data manipulation, data access, data retrieval, data query, and data security. SQL, developed by the American National Standards Institute (ANSI), is primarily a query language that allows users to elicit responses from their database to specific queries, both on mainframes and on PCs. SQL has helped to bring some standardization to relational systems so that users can transfer their experience from one database system to another without going through a steep learning curve.
Now, most DBMS products use some version of SQL, whose primary purpose is to allow users to query a database and generate ad hoc reports or planned reports that provide customized information.