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The SDSS Science Archive Query Tool
Peter Z. Kunszt and Aniruddha R. Thakar
The Johns Hopkins University
April 25, 2000
Contents
Introduction and Overview
The SX Query Tool
Installation
Command line switches
The sxQT Main Window
The Login Window
Selecting the Server Site
Logging In
Quitting the Login Window
The Query Window
Query Preparation
Sample Queries
Saving Queries
Query Submission
Query Checking
Launch Query
Aborting Queries
Manipulating Query Output
Checking the Server Status
Options
What to do if...
Query Abort Hangs
Query Analysis Hangs
The connection is down and cannot be reestablished
Reporting New Bugs
If you need assistance
sxQT Error Messages
SXQL Errors
Query Window Errors
Login Errors
Configuration Errors
Server Connection Errors
The SX Query Language
SXQL Syntax
SELECT-FROM-WHERE Block
Extraction Specification
Logical Operations between SELECT Blocks
Composing Predicates
Coordinate Cuts
Rules for Nested Select Blocks
Keywords
Operators
Lists of Proximity Queries - the ProxList Server
Example Queries
Some general hints
Some 'real' Query Examples
Query 1: Cataclysmic variables
Query 2: Velocities and errors
Query 3: Coordinate cut
Query 4: Searching objects and fields by ID
Query 5: Galaxies with bluer centers
Query 6: PSF colors of stars
Query 7: Cluster finding
Query 8: Diameter-limited sample of galaxies
Query 9: Extremely red galaxies:
Query 10: The BRG sample
Query 11: Low-z QSO candidates
Query 12: Errors on moving objects
Query 13: A random sample of the data
Query 14: tsObj data for a list of objects
Query 15: Find quasars
About this document ...
© The Johns Hopkins University 2000
Generated by Ani Thakar at 2001-05-31
The SDSS Science Archive Query Tool