整数都是自然数吗

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select * from tbl_Articles WHERE ArticleID=148067 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=148067 LIMIT 0,1
select * from tbl_Articles_sphinx where id=148067 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1077084,1075949,1067996,1074290,1067203,1068524,1053684,1066118,1016441,1066226,1063151,1074562,1054638,1048158,1077619,1048878,1049946,1060817,1064345,1052865,1061494,1073407,1053778,1048558,1062424,3316193,1064147,1077026,1051599,1066392) ORDER BY field (ArticleID,1077084,1075949,1067996,1074290,1067203,1068524,1053684,1066118,1016441,1066226,1063151,1074562,1054638,1048158,1077619,1048878,1049946,1060817,1064345,1052865,1061494,1073407,1053778,1048558,1062424,3316193,1064147,1077026,1051599,1066392)