有理数的分类是什么

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select * from tbl_Articles WHERE ArticleID=3398436 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3398436 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3398436 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1103720,1113904,523954,1107106,367983,1109805,553783,1108922,596838,377647,1094597,1120364,379932,378024,1118402,463981,1097221,359262,376985,1085360,1090599,1100443,2932749,1110672,509042,1122154,1090378,1104637,1304993,602648) ORDER BY field (ArticleID,1103720,1113904,523954,1107106,367983,1109805,553783,1108922,596838,377647,1094597,1120364,379932,378024,1118402,463981,1097221,359262,376985,1085360,1090599,1100443,2932749,1110672,509042,1122154,1090378,1104637,1304993,602648)