分式化简的目的是什么

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select * from tbl_Articles_data WHERE ArticleID=2424010 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1041283,1120418,1062392,1078599,1074618,1065683,1102388,1080747,1068973,1108976,1090835,997640,1080663,1048220,1125059,2662119,1064944,982771,1084303,1131967,1049946,1065729,1086698,1054942,1080441,1096308,1100723,1009146,1071265,1107727) ORDER BY field (ArticleID,1041283,1120418,1062392,1078599,1074618,1065683,1102388,1080747,1068973,1108976,1090835,997640,1080663,1048220,1125059,2662119,1064944,982771,1084303,1131967,1049946,1065729,1086698,1054942,1080441,1096308,1100723,1009146,1071265,1107727)