The GAVO ADQL Reference Card

GAVO's ADQL reference card briefly gives an overview of the SQL dialect used in the VO. It is available as a PDFfile and as Scribus source under the CC-BY license.

GAVO的天文数据查询语言（ADQL, Astronomical Data Query Language）参考卡简要概述了虚拟天文台（VO, Virtual Observatory）中使用的SQL方言。该参考卡以PDF文件及Scribus源文件形式提供，采用CC-BY许可协议。