是否存在一个比无穷大还大的数

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select * from tbl_Articles WHERE ArticleID=2300432 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2300432 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2300432 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1081905,1091735,1076868,1067966,1087793,1105571,1050051,1086338,1064249,1065739,1064905,1066106,1096527,1107058,1100985,1087912,1049048,1085162,992026,1088628,1069922,1066828,1065773,1070284,1069793,1066924,1067049,1064061,1042815,1113618) ORDER BY field (ArticleID,1081905,1091735,1076868,1067966,1087793,1105571,1050051,1086338,1064249,1065739,1064905,1066106,1096527,1107058,1100985,1087912,1049048,1085162,992026,1088628,1069922,1066828,1065773,1070284,1069793,1066924,1067049,1064061,1042815,1113618)