怎么求某个数占整体的百分之多少

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select * from tbl_Articles WHERE ArticleID=1348384 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1348384 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1348384 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1078010,1066478,1083113,1081297,1093479,1062993,1050221,1046512,1083289,997282,1073066,1067395,1056510,1085995,1063309,1083946,1120149,1122152,1084779,1065873,1042562,1081881,1072034,1070995,1053144,1089150,1086434,1046706,1045793,1089058) ORDER BY field (ArticleID,1078010,1066478,1083113,1081297,1093479,1062993,1050221,1046512,1083289,997282,1073066,1067395,1056510,1085995,1063309,1083946,1120149,1122152,1084779,1065873,1042562,1081881,1072034,1070995,1053144,1089150,1086434,1046706,1045793,1089058)