Your SQL command was:

SELECT
s.plate, s.fiberid, s.mjd, s.z, s.zwarning,
g.h_beta_flux, g.h_beta_flux_err,
g.h_alpha_flux, g.h_alpha_flux_err 
FROM GalSpecLine AS g 
JOIN SpecObj AS s 
ON s.specobjid = g.specobjid 
WHERE 
h_alpha_flux > h_alpha_flux_err*5 
AND h_beta_flux > h_beta_flux_err*5 
AND h_beta_flux_err > 0 
AND h_alpha_flux > 10.*h_beta_flux 
AND s.class = 'GALAXY' 
AND s.zwarning = 0 

Your query output (max 500,000 rows):