0是正整数吗为什么

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select * from tbl_Articles WHERE ArticleID=2706999 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2706999 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2706999 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(3256648,2756262,360933,3497157,658054,606656,1122603,867899,1692283,558217,1173140,2709651,400000,768375,978407,3266707,1743841,1137492,1046667,100813,713261,1428085,2560931,1116031,1122372,3382646,1093212,1176510,636241,2558676) ORDER BY field (ArticleID,3256648,2756262,360933,3497157,658054,606656,1122603,867899,1692283,558217,1173140,2709651,400000,768375,978407,3266707,1743841,1137492,1046667,100813,713261,1428085,2560931,1116031,1122372,3382646,1093212,1176510,636241,2558676)