比喻有着怎样的表达作用

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select * from tbl_Articles WHERE ArticleID=210681 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=210681 LIMIT 0,1
select * from tbl_Articles_sphinx where id=210681 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1078903,1081881,1108640,1042879,1071942,1115755,1075793,1110255,1057383,1123417,1079131,1078605,1110870,1093280,1077496,1078318,1055526,1074867,1053584,1069045,1071089,1121936,1110914,1102156,1021036,1114608,1116877,1096068,1109118,1099075) ORDER BY field (ArticleID,1078903,1081881,1108640,1042879,1071942,1115755,1075793,1110255,1057383,1123417,1079131,1078605,1110870,1093280,1077496,1078318,1055526,1074867,1053584,1069045,1071089,1121936,1110914,1102156,1021036,1114608,1116877,1096068,1109118,1099075)