| Introduction To SQl |
SQL is a standard computer language for accessing and manipulating databases.
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 a Standard - BUT....
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!
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