划分词类的标准是什么请举例说明

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select * from tbl_Articles WHERE ArticleID=2766801 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2766801 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2766801 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1106196,1100795,1105261,1078428,1074686,1055718,2390057,1077084,1104824,1119560,1079069,1065019,1062062,1101587,1077026,1057607,1066132,3279568,1120410,1069059,1096845,1064147,1051847,1009146,1015577,1067035,1045843,1051435,1089464,1094987) ORDER BY field (ArticleID,1106196,1100795,1105261,1078428,1074686,1055718,2390057,1077084,1104824,1119560,1079069,1065019,1062062,1101587,1077026,1057607,1066132,3279568,1120410,1069059,1096845,1064147,1051847,1009146,1015577,1067035,1045843,1051435,1089464,1094987)