The development history of SQL language

The development history of SQL language

SQL is the abbreviation for Structured Query Language (Structure query Language), which is a database application language using the relational model, developed by IBM in the 70 's as the prototype relational language for IBM relational database prototype system R, It realizes the information retrieval in the relational database.

In the early 80, the U.S. National Standards Agency (ANSI) began to develop the SQL standard, the earliest ANSI standard was completed in 1986, it is also called SQL-86.
The introduction of standards has strengthened the status of SQL as a standard relational database language.
The SQL standard has been modified and perfected, and the new SQL Standard is the SQL-92 of 1992, and its name is "International standard ISO/IEC 9075:1992,database Language SQS".

Because of the standardization of the SQL language, most relational database systems support the SQL language, which has evolved into the underlying conversational language for multiple platforms to interoperate.

The development history of SQL language