锐志为什么有俩种标？

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select * from tbl_Articles WHERE ArticleID=698438 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=698438 LIMIT 0,1
select * from tbl_Articles_sphinx where id=698438 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(761143,769030,1056397,961882,890749,1549127,1092092,650382,916622,1022936,1089741,411809,945162,581973,754370,837361,623592,726401,446120,929061,891071,695980,770399,464958,668617,626572,375472,662786,667310,421485) ORDER BY field (ArticleID,761143,769030,1056397,961882,890749,1549127,1092092,650382,916622,1022936,1089741,411809,945162,581973,754370,837361,623592,726401,446120,929061,891071,695980,770399,464958,668617,626572,375472,662786,667310,421485)