对象为什么叫对象

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select * from tbl_Articles WHERE ArticleID=3450279 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3450279 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3450279 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(551949,3083208,2942502,460836,2236891,3522554,942073,3869547,3202922,3519305,2942477,557052,2269935,3366277,418303,399341,1137076,3951848,1105802,3273992,816475,3584246,3934312,1508564,885003,491962,515552,728399,2652827,986110) ORDER BY field (ArticleID,551949,3083208,2942502,460836,2236891,3522554,942073,3869547,3202922,3519305,2942477,557052,2269935,3366277,418303,399341,1137076,3951848,1105802,3273992,816475,3584246,3934312,1508564,885003,491962,515552,728399,2652827,986110)