SQL:1999

This article is about SQL:1999, a revision of the SQL standard. For more information about SQL, see the main SQL article.

SQL:1999 is the fourth revision of the SQL database query language. The latest revision of the standard is SQL:2008.

Summary

The SQL:1999 standard, also known as SQL3, was published in 1999. Unlike previous editions, the standard's name used a colon instead of a hyphen for consistency with the names of other ISO standards. SQL:1999 has several parts:

• SQL/Framework ISO/IEC 9075-1:1999
• SQL/Foundation ISO/IEC 9075-2:1999
• SQL/CLI : an updated definition of the extension Call Level Interface, originally published in 1995, also known as CLI-95 ISO/IEC 9075-3:1999
• SQL/PSM : an updated definition of the extension Persistent Stored Modules, originally published in 1996, also known as PSM-96 ISO/IEC 9075-4:1999
• SQL/Bindings ISO/IEC 9075-5:1999

Boolean data types

The SQL:1999 standard clearly state in ISO/IEC 9075-2:1999 section 4.6 Boolean types, but many commercial SQL Servers (Microsoft SQL Server 2005, Oracle 9i, IBM DB2) do not support it as a table type, variable type or allow it in the results set. MySQL interprets "BOOLEAN" as a synonym for TINYINT (8-bit signed integer).

References

• Lans, Rick F. van der (2007). SQL for MySQL developers: a comprehensive tutorial and reference. Upper Saddle River, NJ: Addison Wesley. pp. vii-1004. ISBN 9780131497351.