什么叫同质化

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select * from tbl_Articles WHERE ArticleID=698064 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=698064 LIMIT 0,1
select * from tbl_Articles_sphinx where id=698064 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1090613,417918,362703,100714,418303,1094419,1304635,100682,373379,718497,3481005,931500,1088850,368379,1098475,1116589,1084467,101134,1170876,87144,1478164,1471041,100503,363497,1086172,100801,1087595,2102316,86248,1097857) ORDER BY field (ArticleID,1090613,417918,362703,100714,418303,1094419,1304635,100682,373379,718497,3481005,931500,1088850,368379,1098475,1116589,1084467,101134,1170876,87144,1478164,1471041,100503,363497,1086172,100801,1087595,2102316,86248,1097857)