分数的最小公分母怎么求

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select * from tbl_Articles WHERE ArticleID=1874462 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1874462 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1874462 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1606619,1074244,1082962,1132865,1083141,1088484,1128521,1068450,1078424,1062298,1084954,1076193,1060241,1062336,1062324,1080995,1067966,1068264,1079139,1079546,1086095,1064061,1086582,1063309,1089150,1084307,1059016,1059338,1064573,1074328) ORDER BY field (ArticleID,1606619,1074244,1082962,1132865,1083141,1088484,1128521,1068450,1078424,1062298,1084954,1076193,1060241,1062336,1062324,1080995,1067966,1068264,1079139,1079546,1086095,1064061,1086582,1063309,1089150,1084307,1059016,1059338,1064573,1074328)