What is SQL?
SQL
stands for Structured Query Language.
SQL
is a 4th generation programming language and it lets you access and manipulate
databases.
The SQL programming
language was first developed in the 1970s by IBM researchers
and
is the most common method of accessing data in databases today.
SQL
became a standard of the American National Standards Institute (ANSI) in 1986,
and of the International Organization for Standardization (ISO) in 1987.
SQL
can be used on a “Database Management System” or DBMS. A DBMS is a software
interface that accesses a database so that you can run SQL queries on the data
objects of a database. Some commonly used DBMS systems include SQL Server,
Oracle, DB2, dBASE, PostgreSQL, MongoDB, and SQLite.
There
are also many different dialects of SQL, some examples:
Ø IBM DB2: SQL PL dialectØ Oracle: PL/SQL dialectØ Microsoft SQL Server: T-SQL dialectØ PostgreSQL: PL/pgSQL dialect
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