The Structured Query Language (SQL) is the standard language for accessing SQL databases such as SQL Server, Oracle, MySQL, Excel, and Access, among others. Knowledge of SQL is invaluable for anyone wanting to store or retrieve data from a database.
What is SQL?
•SQL stands for Structured Query Language
•SQL allows you to access a database
•SQL is an ANSI standard computer language
•SQL can execute queries against a database
•SQL can retrieve data from a database
•SQL can insert new records in a database
•SQL can delete records from a database
•SQL can update records in a database
SQL is an ANSI (American National Standards Institute) standard computer language for accessing and manipulating database systems. SQL statements are used to retrieve and update data in a database. SQL works with database programs like MS Access, DB2, Informix, MS SQL Server, Oracle, Sybase, etc.
Unfortunately, there are many different versions of the SQL language, but to be in compliance with the ANSI standard, they must support the same major keywords in a similar manner (such as SELECT, UPDATE, DELETE, INSERT, WHERE, and others).
Note: Most of the SQL database programs also have their own proprietary extensions in addition to the SQL standard.
