学生成绩abc怎样划分

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select * from tbl_Articles WHERE ArticleID=2798779 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2798779 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2798779 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(117544,2012920,116451,121302,1046594,108118,113759,122755,2808159,107869,2740105,2471062,118437,222742,112573,125707,1126168,803730,112908,180275,1095345,118013,1734587,112274,113751,118623,1477789,1946977,111503,123244) ORDER BY field (ArticleID,117544,2012920,116451,121302,1046594,108118,113759,122755,2808159,107869,2740105,2471062,118437,222742,112573,125707,1126168,803730,112908,180275,1095345,118013,1734587,112274,113751,118623,1477789,1946977,111503,123244)