怎样计算数值在总体的百分比

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select * from tbl_Articles WHERE ArticleID=2239021 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2239021 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2239021 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1075710,1108171,1043756,1102470,1108724,1098673,1110620,1095345,1070000,1100033,1053584,1061610,1092367,1063581,1077892,1085912,1104745,1070058,1054136,981687,1066106,1110031,1371409,1075967,1075610,1064977,1069273,1068264,1087884,1089237) ORDER BY field (ArticleID,1075710,1108171,1043756,1102470,1108724,1098673,1110620,1095345,1070000,1100033,1053584,1061610,1092367,1063581,1077892,1085912,1104745,1070058,1054136,981687,1066106,1110031,1371409,1075967,1075610,1064977,1069273,1068264,1087884,1089237)