SDSS catalog data demo, March 30, 2007
22
Jordan Raddick and Ani Thakar
CAS Dos and Don’ts
•Do not submit a query unless you have some idea how long it will take!
–It could tie up the server for hours (even days)!
–Use “select count(*)” or “select top 10” instead
–Or try “quick” first, to see if it can be done quickly
•Do use predefined views for commonly-used objects and parameters
–PhotoObj, PhotoPrimary for photometry
–PhotoTag if you only need popular fields
–SpecObj for spectra