SQL- database language

Introduction to SQL and Database definition in SQL

• All the relational database management systems, in practice, use SQL language as the main interface for database processing.
• All operations on the database may be done in SQL. These include
  • user management,
  • database definition, and
  • querying and maintaining the database.
• SQL is a standardized language, and the standard is followed quite well, although there are some differences in the various SQL implementations.
• Database management systems may provide SQL in many forms. It may be provided as
  • an interactive command and query language, and/or as
  • a languge to be used as embedded in programs written in some programming language.