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1.5 MySQL Standards Compliance
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This section describes how MySQL relates to the ANSI/ISO SQL standards.
MySQL Server has many extensions to the SQL standard, and here you will
find out what they are and how to use them. You will also find
information about functionality missing from MySQL Server, and how to
work around some differences.
The SQL standard has been evolving since 1986 and several versions
exist. In this manual, "SQL-92" refers to the standard released in 1992,
"SQL:1999" refers to the standard released in 1999, and "SQL:2003"
refers to the current version of the standard. We use the phrase "the
SQL standard" to mean the current version of the SQL Standard at any
time.
Our goal is to not restrict MySQL Server usability for any usage
without a very good reason for doing so. Even if we don't have the
resources to perform development for every possible use, we are always
willing to help and offer suggestions to people who are trying to use
MySQL Server in new territories.
One of our main goals with the product is to continue to work toward
compliance with the SQL standard, but without sacrificing speed or
reliability. We are not afraid to add extensions to SQL or support for
non-SQL features if this greatly increases the usability of MySQL
Server for a large segment of our user base. The `HANDLER' interface
in MySQL Server 4.0 is an example of this strategy. `HANDLER'
HANDLER.
We will continue to support transactional and non-transactional
databases to satisfy both mission-critical 24/7 usage and heavy Web or
logging usage.
MySQL Server was originally designed to work with medium size databases
(10-100 million rows, or about 100MB per table) on small computer
systems. Today MySQL Server handles terabyte-size databases, but the
code can also be compiled in a reduced version suitable for hand-held
and embedded devices. The compact design of the MySQL server makes
development in both directions possible without any conflicts in the
source tree.
Currently, we are not targeting realtime support, although MySQL
replication capabilities offer significant functionality.
Database cluster support exists through third-party clustering
solutions as well as the integration of our acquired NDB Cluster
technology, available from version 4.1.2. NDBCluster.
We are also looking at providing XML support in the database server.
Menu
* Standards What Standards MySQL Follows
* SQL mode Selecting SQL Modes
* ANSI mode Running MySQL in ANSI Mode
* Extensions to ANSI MySQL Extensions to Standard SQL
* Differences from ANSI MySQL Differences from Standard SQL
* Constraints How MySQL Deals with Constraints
* Bugs Known Errors and Design Deficiencies in MySQL
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