怎样判断分数接近二分之一

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select * from tbl_Articles WHERE ArticleID=2356549 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2356549 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2356549 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(119437,3282489,1122250,191812,1041811,125267,122293,1070668,117503,3286981,1458996,123598,410978,852109,3376412,108966,123062,1052675,1672631,112285,2517810,1679729,115721,119651,1071942,1071247,118437,110849,1084165,113722) ORDER BY field (ArticleID,119437,3282489,1122250,191812,1041811,125267,122293,1070668,117503,3286981,1458996,123598,410978,852109,3376412,108966,123062,1052675,1672631,112285,2517810,1679729,115721,119651,1071942,1071247,118437,110849,1084165,113722)