如何计算倒推毛利率

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select * from tbl_Articles WHERE ArticleID=157939 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=157939 LIMIT 0,1
select * from tbl_Articles_sphinx where id=157939 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1451856,2271854,1053922,1070668,450495,1051075,1943106,2683582,1075823,1468889,1063395,2386155,2879480,2025045,1927823,1364676,1074542,1865331,1701457,1739648,3021742,2454549,692284,1045085,578254,2601130,2492374,1105345,798895,1089840) ORDER BY field (ArticleID,1451856,2271854,1053922,1070668,450495,1051075,1943106,2683582,1075823,1468889,1063395,2386155,2879480,2025045,1927823,1364676,1074542,1865331,1701457,1739648,3021742,2454549,692284,1045085,578254,2601130,2492374,1105345,798895,1089840)