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IVOA Astronomical Data Query Language
Version 2.00

IVOA Recommendation 30 October 2008

Interest/Working Group:
Iñaki Ortiz, Jeff Lusted, Pat Dowler, Alexander Szalay, Yuji Shirasaki, Maria A. Nieto-Santisteban, Masatoshi Ohishi, William O’Mullane, Pedro Osuna, the VOQL-TEG and the VOQL Working Group.
Pedro Osuna and Iñaki Ortiz


This document describes the Astronomical Data Query Language (ADQL). ADQL has been developed based on SQL92. This document describes the subset of the SQL grammar supported by ADQL. Special restrictions and extensions to SQL92 have been defined in order to support generic and astronomy specific operations.

Status of this document

This document has been produced by the VO Query Language Working Group.
It has been reviewed by IVOA Members and other interested parties, and has been endorsed by the IVOA Executive Committee as an IVOA Recommendation. It is a stable document and may be used as reference material or cited as a normative reference from another document. IVOA's role in making the Recommendation is to draw attention to the specification and to promote its widespread deployment. This enhances the functionality and interoperability inside the Astronomical Community.

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