二次函数的斜率怎么求

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select * from tbl_Articles WHERE ArticleID=3331775 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3331775 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3331775 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1091177,1091097,1117456,1048360,1089522,1065251,1042562,1067315,1084307,1067305,1074851,1041471,1042959,1047643,1043625,1075586,1048422,1065223,1064645,1057491,1073846,1046100,1073144,1091757,1111248,1063867,1087713,1072138,1060755,1092868) ORDER BY field (ArticleID,1091177,1091097,1117456,1048360,1089522,1065251,1042562,1067315,1084307,1067305,1074851,1041471,1042959,1047643,1043625,1075586,1048422,1065223,1064645,1057491,1073846,1046100,1073144,1091757,1111248,1063867,1087713,1072138,1060755,1092868)