c1和c2有什么区别

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select * from tbl_Articles WHERE ArticleID=3400853 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3400853 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3400853 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1062866,1071905,1058085,1118244,1086760,1048112,997072,1049946,1050037,1080375,1107995,1053494,1067531,1057674,1132115,1065347,1052887,1067697,1053224,1071089,1129683,1131015,1051135,1071691,1065281,1081123,1071941,1070530,1069833,1065599) ORDER BY field (ArticleID,1062866,1071905,1058085,1118244,1086760,1048112,997072,1049946,1050037,1080375,1107995,1053494,1067531,1057674,1132115,1065347,1052887,1067697,1053224,1071089,1129683,1131015,1051135,1071691,1065281,1081123,1071941,1070530,1069833,1065599)