两点间的斜率公式

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select * from tbl_Articles WHERE ArticleID=940779 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=940779 LIMIT 0,1
select * from tbl_Articles_sphinx where id=940779 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(407594,1061231,476971,844107,1053821,1167374,1110815,1138961,788804,961326,1181150,895481,1142810,1674903,394508,1101794,1092671,1551383,1169817,524713,390447,774073,566459,1145058,1031964,1062233,1081026,916758,2260085,1203500) ORDER BY field (ArticleID,407594,1061231,476971,844107,1053821,1167374,1110815,1138961,788804,961326,1181150,895481,1142810,1674903,394508,1101794,1092671,1551383,1169817,524713,390447,774073,566459,1145058,1031964,1062233,1081026,916758,2260085,1203500)