Your SQL command was:
SELECT top 100
objid, ra, dec, psfmag_i-extinction_i AS mag_i,
psfmag_r-extinction_r AS mag_r, z 
FROM SpecPhoto 
WHERE 
 (class = 'QSO') 

Your query output (max 500,000 rows):

objidradecmag_imag_rz
1237660024494686312339.21747-1.248835119.1925119.171440.8631509
1237663543150117358339.47663-0.0903742519.7643120.237081.820907
1237663478724363112338.93298-0.2701876720.0154220.295333.181853
1237656906345677139338.56141-0.9222257219.7302920.102961.861428
1237660024494424268338.64682-1.237851619.3440219.379721.399138
1237663542612721855338.26511-0.5409718219.3074219.510681.452734
1237678617414664483352.732921.18396519.8618520.025691.439652
1237666408439152865352.479860.34550520.4357620.849970.517168
123767843701548679237.6293561.056929221.3590721.469720.8642989
123767843701548670637.6872181.212781818.9644119.343180.2659231
123765706632986639118.051926-2.61355519.8087219.944122.169735
123767943506329639818.216065-2.35796321.5934721.560291.056121
123767943398942332017.963696-3.087370419.9834520.05022.633005
123767943452629422417.847659-2.764780520.7625820.744122.158955
123767943452616315617.630435-2.855532820.0196220.588920.569351
123767943452622869217.686109-2.754335120.7376821.270562.303402
123767943452616304417.593743-2.703336919.5432219.483441.171885
123767943452616335817.616397-2.667100921.6296521.569351.548879
123767943452609757917.529599-2.804468419.2383819.277572.262471
123767943506303393417.560214-2.282681518.3395118.348910.7267431
1237669698911994435340.746867.646852920.3848720.645131.971785
1237669698912059980340.840737.671124221.6904321.6782.217262
1237669698912059728340.843277.628996421.1975721.252572.005527
1237669697838252558340.737376.644928220.4372721.448710.213203
1237669762262433859340.796116.515653719.9741419.880251.098842
1237669762799239570340.676166.877593920.4757320.742692.274631
1237669698911928818340.51517.510356519.7727520.039282.060062
1237669698911928708340.527827.530102819.2851619.600090.2823512
1237669698911929082340.544117.562987121.2707121.550161.767433
1237669762799042836340.223226.841350720.7583820.741792.448458
1237669762799108479340.358476.864797920.5653820.476231.383174
1237669762799108320340.406436.990814818.6865818.700922.579856
1237669698374927051340.314677.184885821.6371121.583032.60252
1237669763872850601340.324687.684287320.3178321.153060.6029713
1237669763335913633340.137237.433513319.2872819.371212.199704
1237669698374860847340.122177.197833918.7063318.86582.490113
1237679008243122465339.926828.111945320.2412220.453642.77093
1237667782296863277182.4836422.25730820.0363520.083972.842661
1237667735044686247182.4809322.34088720.1112120.172992.264021
1237667781223186485182.6141421.35240218.9346119.286662.049472
1237667781760057433182.6070621.74005118.9314818.904121.137311
1237667782297059801182.9782422.12528621.7110421.60811.537782
1237667734508077246182.9887921.93203121.6162821.468911.780702
1237667733971075232182.8321521.47223918.7957318.925442.19652
1237667781760188529182.9662921.8001119.6790219.572672.188157
1237667733971141040182.9792921.48787222.0631921.896120.3710844
1237667781223317854182.9954321.41573421.8554621.911331.057545
1237667733971272024183.2585421.44075120.0825820.106112.537941
1237667781223448989183.2299121.37599721.4347221.152553.00406
1237667781223383291183.1437521.4146419.9432819.96072.604818
1237667782297780580184.7408522.19901720.8034420.789340.919263
1237667782297780494184.8120322.27849118.8462919.131071.955841
1237667782297715504184.6596622.18927821.3945121.401051.333251
1237667782297715091184.5832922.21015519.2314319.839822.126276
1237667782834586105184.6382522.57095121.3668921.298443.011387
1237667735045538485184.579322.41452919.8895320.315440.377339
1237657628449702267164.1826949.84880121.3478421.77053.095063
1237657856068616322164.1049850.10208819.6975419.913471.511518
1237657856068616335164.220650.05584219.9337419.866210.9942142
1237657628449702118164.2137249.85745920.6646820.744012.406655
1237657627912634650163.685949.33777520.0004921.022155.366827
1237658206116184354163.9515649.29681820.6119120.707851.158025
1237657628449570980163.9034549.77120719.1938219.427661.828525
1237657628449636590164.0483149.80078520.0542220.301691.692205
1237657628449636980164.0984249.84180120.0638321.089460.4773179
1237657856068551217163.959750.07476419.9517920.347850.7355359
1237657856068485784163.8887149.93173120.8721920.639132.808097
1237657856068550806163.8485750.10983320.0547120.071260.7377597
1237657856068354155163.2991149.82692119.6337419.711251.233044
1237657628449570960163.7918349.86691218.2918818.437083.541689
1237657628986376871163.4944850.07270319.6806419.914593.424835
1237657628986311368163.3339550.02945520.6129620.710653.050338
1237657857142227055163.382250.74344819.7224819.964120.4335306
1237657629523312890163.47650.51206221.5245221.524362.986853
1237657629523313193163.4994750.49979821.8248221.902012.218546
1237657856605290744163.3418550.40809119.5624419.475861.061448
1237657629523378749163.683450.7103620.1836920.237513.731846
1237657856605421785163.8272850.5347919.2739819.433661.96212
1237657628986442379163.6831850.29555720.0221620.508663.433604
1237657628986507924163.896350.33773821.2891221.419113.201026
1237657630060183835163.4091250.92146420.9734221.074462.220095
1237657857142358293163.6710150.94584921.4315221.497782.317149
1237657857142292650163.6163750.80998919.5183119.67251.982167
1237657857142292665163.6764350.75484119.2916619.671891.768461
1237657629523443735163.9424750.66667218.5092818.677752.009546
1237657629523509360164.1296550.65557819.4493119.44411.229043
1237657856605487356164.0547950.53435220.3641920.517971.568228
1237657856605552740164.1175850.54649419.4858419.57371.108759
1237657856605552835164.1488250.51475920.5328620.739930.9441878
1237657856605487352164.0825650.43973821.3512721.454721.884243
1237657628986572992164.0468250.31897720.4011620.456722.701827
1237651504345776377208.89329-0.1449359619.1944919.428891.793982
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1237648704051085343208.21166-0.3288768218.9868118.985411.353717
1237648704051216464208.60515-0.2327956316.4484116.590661.512352
1237648704051085479208.19985-0.3976808619.542919.782751.669696
1237648722317148191208.899270.7036302818.2793618.542391.624181
1237674601603793193208.744891.078943220.0590820.438590.3650836
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1237651212287148115258.0310258.79847517.9753417.90820.2692253