DR2 Help
 Archive Intro
 Table Descriptions
 Schema Browser
 Introduction to SQL
 Form Query User Guide
 Query Limits
 How To
 SkyServer Sites
 SkyServer Traffic Page
 Web Browsers
 Contact Help Desk
The help page entry points are listed on the left navigation menu.
Simply click on a topic to go there. Each entry is briefly described here.

Archive Intro gives an overview of the archive

Table Description provides a description of the database tables

Schema Browser lets you browse database tables/colums/stored procedures etc

Glossary is a list of terms used on the site and in SDSS

Algorithms describes the data reduction algorithms

Introduction to SQL explains how to write advanced Stuctured Query Language in sdssQA

Form Query User Guide provides help on using the IQS/SQS Form Query pages

Query Limits lists the timeouts and row limits in effect for the various query tools.

How To provides detailed interactive tutorials on using SQL for searching and graphing SDSS data

FAQ are our Frequently Asked Questions

API contains information on how to programatically access some of the SDSS services

sdssQA explains how to download and use the SDSSQuery Analyzer tool

Download selected papers and tools

SkyServer Sites lists the various SkyServer websites and physical locations, including mirror sites.

SkyServer Traffic Page takes you to the central traffic logging site, where you can see up-to-the-hour usage and traffic data.

Web Browsers lists supported browser info

Contact Help Desk allows you to send us an email