及格率怎么算的

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select * from tbl_Articles WHERE ArticleID=1167570 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1167570 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1167570 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2383216,1660147,1154693,394622,1113686,1104677,1122549,626826,1119692,1091705,533337,1112782,799242,1519840,1119714,1061255,561746,1102252,1182654,1110033,1103574,1236152,765469,2926015,1119023,1091345,473147,407104,1115384,1232110) ORDER BY field (ArticleID,2383216,1660147,1154693,394622,1113686,1104677,1122549,626826,1119692,1091705,533337,1112782,799242,1519840,1119714,1061255,561746,1102252,1182654,1110033,1103574,1236152,765469,2926015,1119023,1091345,473147,407104,1115384,1232110)