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):
| objid | ra | dec | mag_i | mag_r | z |
| 1237655495440793611 | 199.04076 | -1.9010984 | 17.73557 | 17.75181 | 0.4058664 |
| 1237655499736154396 | 198.9723 | -1.6811158 | 19.01752 | 19.13267 | 0.7635407 |
| 1237655500272894139 | 198.78031 | -1.2902461 | 19.07867 | 19.16897 | 1.158989 |
| 1237655499199348942 | 199.10233 | -2.0903988 | 18.12376 | 18.52004 | 0.1139695 |
| 1237655498663329873 | 201.04047 | -2.4528045 | 18.95086 | 19.20493 | 0.6527184 |
| 1237655498663264397 | 201.03979 | -2.496211 | 18.69622 | 18.64609 | 1.161739 |
| 1237655498663264417 | 200.90472 | -2.4814818 | 18.60555 | 18.52272 | 0.9912512 |
| 1237650760788934923 | 200.64748 | -3.131791 | 18.93202 | 18.99673 | 2.048255 |
| 1237655497589260424 | 200.41382 | -3.4454947 | 18.71995 | 18.85142 | 2.003694 |
| 1237650760788934876 | 200.60278 | -3.2022087 | 17.26428 | 17.72482 | 0.08569597 |
| 1237650760788738177 | 200.10355 | -3.0821404 | 19.48887 | 19.37688 | 0.8557931 |
| 1237655498126065746 | 200.26647 | -2.8406603 | 18.49743 | 18.6917 | 0.4578696 |
| 1237655493293834535 | 200.26186 | -3.509287 | 19.67807 | 19.88858 | 1.840259 |
| 1237655498662805550 | 199.96823 | -2.4286813 | 18.83156 | 18.89857 | 2.002492 |
| 1237655497589063841 | 199.88824 | -3.3622392 | 18.88138 | 18.93333 | 1.445244 |
| 1237655498125803670 | 199.59539 | -2.9785127 | 19.04289 | 19.02957 | 0.7224975 |
| 1237655498125803539 | 199.56629 | -2.9887397 | 18.90779 | 19.04775 | 0.747314 |
| 1237655498125803577 | 199.6416 | -2.861362 | 18.40966 | 18.48416 | 1.455596 |
| 1237655493293375588 | 199.34768 | -3.5735456 | 18.44332 | 18.47471 | 1.148674 |
| 1237655497588802091 | 199.32859 | -3.3803768 | 21.98747 | 22.12742 | 4.011231 |
| 1237650760788214151 | 198.94934 | -3.0771133 | 20.08627 | 20.14522 | 1.521575 |
| 1237650761325019574 | 198.83572 | -2.8264302 | 19.99904 | 20.10335 | 2.108326 |
| 1237655499199480001 | 199.48879 | -2.1875685 | 19.52973 | 19.55828 | 2.058689 |
| 1237655499736416568 | 199.68064 | -1.7277663 | 17.9559 | 18.43185 | 0.0852819 |
| 1237655495441055946 | 199.77442 | -1.869111 | 18.64102 | 18.78165 | 1.543466 |
| 1237655494904185033 | 199.76963 | -2.2226908 | 18.97839 | 19.23222 | 1.713668 |
| 1237655498663133434 | 200.67698 | -2.4227957 | 16.57044 | 16.95714 | 0.1211107 |
| 1237655499199742168 | 200.0895 | -2.1525732 | 18.7119 | 18.86363 | 1.203868 |
| 1237655494904512613 | 200.43083 | -2.2959665 | 18.59266 | 18.59274 | 1.284843 |
| 1237655495441252639 | 200.11628 | -1.9681586 | 20.31255 | 20.23816 | 0.8450198 |
| 1237655499199873053 | 200.3662 | -2.1062399 | 18.56515 | 18.75772 | 2.01411 |
| 1237655494904512751 | 200.39069 | -2.2980267 | 20.11722 | 20.22299 | 1.661688 |
| 1237655495441317966 | 200.35998 | -1.9072847 | 18.80066 | 18.93141 | 2.087446 |
| 1237655494904643623 | 200.71311 | -2.2325679 | 18.28778 | 18.19999 | 0.858525 |
| 1237655494904643700 | 200.77965 | -2.2971183 | 18.50264 | 18.69807 | 1.709424 |
| 1237655495978319887 | 200.5628 | -1.3767916 | 18.36392 | 18.48311 | 1.459825 |
| 1237655495441580148 | 200.83726 | -1.8572907 | 19.02102 | 19.238 | 0.6467403 |
| 1237655499200069850 | 200.84722 | -1.9949815 | 19.97153 | 19.70769 | 0.3502872 |
| 1237655499200135193 | 200.9698 | -2.0171476 | 17.71999 | 18.07739 | 0.2229706 |
| 1237655495978451113 | 200.91797 | -1.4636714 | 16.96816 | 17.46168 | 0.07687543 |
| 1237655495441711210 | 201.1558 | -1.8259422 | 19.00348 | 18.82748 | 0.9965449 |
| 1237655495441711238 | 201.17328 | -1.9005349 | 18.71499 | 19.10238 | 1.4408 |
| 1237655499753062783 | 237.62809 | -0.86259271 | 18.74958 | 18.89988 | 1.614296 |
| 1237655693020823962 | 237.75181 | -1.024867 | 19.24437 | 19.22155 | 1.185544 |
| 1237648704064127211 | 237.97808 | -0.2681359 | 19.22189 | 19.22273 | 0.754161 |
| 1237655693020627266 | 237.28318 | -0.95818603 | 18.51266 | 18.47654 | 0.2763042 |
| 1237655693020692899 | 237.46999 | -1.096771 | 18.26212 | 18.47466 | 1.928066 |
| 1237655693557563735 | 237.45614 | -0.61546328 | 18.7016 | 18.78782 | 0.465074 |
| 1237655499752997292 | 237.53892 | -0.85155702 | 18.89585 | 19.10558 | 1.905479 |
| 1237655693020758048 | 237.57819 | -0.96035836 | 18.35842 | 18.40913 | 2.025719 |
| 1237648673992605833 | 237.84913 | -0.15504113 | 18.7802 | 18.98175 | 1.556218 |
| 1237648673992671546 | 237.90846 | -0.074424922 | 19.01444 | 19.11823 | 0.3631845 |
| 1237648703526863144 | 237.11287 | -0.72880939 | 19.38638 | 19.52645 | 3.390846 |
| 1237655499752865984 | 237.2519 | -0.88190316 | 18.10618 | 18.3351 | 1.764705 |
| 1237655499752865873 | 237.16475 | -0.86641079 | 18.64441 | 18.5053 | 0.7100691 |
| 1237648721255793132 | 237.25694 | -0.11667907 | 18.43776 | 19.05931 | 0.09801673 |
| 1237648721255793211 | 237.30747 | -0.094876493 | 18.97928 | 18.90571 | 2.232757 |
| 1237655693020496203 | 237.03381 | -0.91023403 | 19.48717 | 19.70935 | 2.596543 |
| 1237655499752735168 | 236.91211 | -0.86504556 | 18.65594 | 18.74337 | 0.5035439 |
| 1237648720718922124 | 237.20984 | -0.48057259 | 19.69107 | 19.5423 | 0.7825161 |
| 1237648721255596169 | 236.77664 | -0.020624753 | 18.73186 | 18.56488 | 0.7767798 |
| 1237648704600474260 | 236.85931 | 0.096006389 | 20.61031 | 20.3037 | 0.8250371 |
| 1237648704063734335 | 237.08745 | -0.2049588 | 20.16762 | 20.63047 | 0.8304229 |
| 1237655693557171273 | 236.61447 | -0.53911052 | 19.41219 | 19.83064 | 0.4084791 |
| 1237655499215798939 | 236.79133 | -1.1834841 | 19.89739 | 19.89232 | 2.126514 |
| 1237648703526666368 | 236.6769 | -0.80027185 | 17.97578 | 18.186 | 1.591869 |
| 1237648721255466210 | 236.55529 | -0.087082755 | 19.84995 | 20.27926 | 0.3834768 |
| 1237648721255399967 | 236.41045 | -0.17198834 | 18.99645 | 19.16872 | 1.789044 |
| 1237648704063471819 | 236.59033 | -0.29058044 | 18.48474 | 18.43885 | 1.230654 |
| 1237655693557170374 | 236.49074 | -0.67170395 | 19.65755 | 19.79974 | 1.598305 |
| 1237655693020299332 | 236.53679 | -1.0231343 | 18.36876 | 18.60099 | 1.728968 |
| 1237648703526404198 | 236.08432 | -0.80977018 | 18.25595 | 18.25453 | 1.231088 |
| 1237655693556973776 | 236.0586 | -0.6518577 | 19.75946 | 19.7145 | 2.09675 |
| 1237648703526338658 | 235.90757 | -0.73886816 | 18.82113 | 19.18628 | 0.3107299 |
| 1237648704599884394 | 235.52531 | 0.050313402 | 20.56862 | 20.22674 | 0.8899582 |
| 1237648721792073762 | 235.85394 | 0.31685578 | 18.74817 | 18.89244 | 1.7477 |
| 1237664852033339608 | 214.4719 | 32.666793 | 20.33597 | 20.55723 | 0.6108037 |
| 1237664852033274007 | 214.36627 | 32.872982 | 19.4635 | 19.3761 | 2.44028 |
| 1237665129628369115 | 214.23729 | 32.345841 | 20.38771 | 20.49723 | 2.057098 |
| 1237664852033208648 | 214.18905 | 32.830906 | 20.25793 | 20.31255 | 2.825413 |
| 1237662683608318460 | 214.12817 | 33.096454 | 20.29695 | 21.04611 | 0.5168732 |
| 1237664852569948212 | 214.00068 | 33.378729 | 21.22385 | 21.1477 | 3.153844 |
| 1237662684145123605 | 214.01662 | 33.468018 | 20.47173 | 20.70773 | 0.7495106 |
| 1237665103284470022 | 213.95932 | 32.196853 | 21.18177 | 21.71119 | 1.794414 |
| 1237665103284535569 | 214.13676 | 32.288005 | 20.52808 | 20.62454 | 1.796091 |
| 1237665129628303531 | 214.11155 | 32.52974 | 20.35504 | 20.7935 | 1.73009 |
| 1237665129628238076 | 213.99362 | 32.537944 | 20.29361 | 20.52712 | 2.297269 |
| 1237664852033143091 | 214.01174 | 32.788343 | 20.41859 | 20.40263 | 3.053109 |
| 1237665103821275409 | 213.97061 | 32.750853 | 20.53606 | 20.50516 | 2.282393 |
| 1237665103821275385 | 213.88292 | 32.782426 | 20.79231 | 21.00763 | 1.579246 |
| 1237664852033143156 | 213.97516 | 32.991579 | 20.2885 | 21.06044 | 6.952397 |
| 1237664852033077565 | 213.86278 | 32.981291 | 20.01774 | 20.23071 | 0.9051536 |
| 1237664852569948463 | 213.98582 | 33.247254 | 20.51753 | 20.67387 | 2.397908 |
| 1237662684145057945 | 213.843 | 33.474831 | 19.54309 | 19.6193 | 2.43704 |
| 1237665129628172681 | 213.75615 | 32.601045 | 20.99043 | 21.11773 | 3.204723 |
| 1237665129628172394 | 213.79773 | 32.616956 | 19.71734 | 19.78686 | 3.19176 |
| 1237664852033012095 | 213.71003 | 33.011078 | 21.06721 | 20.9206 | 2.613002 |
| 1237662683608187238 | 213.6649 | 33.08779 | 21.44811 | 21.41965 | 2.511149 |
| 1237662683608187122 | 213.79171 | 33.256062 | 20.17636 | 20.31692 | 1.109507 |
| 1237665129628107028 | 213.56603 | 32.526955 | 20.31186 | 20.34816 | 1.394697 |