余数比除数小为什么

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select * from tbl_Articles WHERE ArticleID=3146529 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3146529 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3146529 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1298039,323245,2129609,2610050,2021417,209652,1088475,2078947,1447988,1585093,1125060,201121,1125586,398902,256170,1097233,1093799,1465170,206024,201322,391774,1622191,1096841,1055067,1323488,1122250,1391981,208685,1090108,875239) ORDER BY field (ArticleID,1298039,323245,2129609,2610050,2021417,209652,1088475,2078947,1447988,1585093,1125060,201121,1125586,398902,256170,1097233,1093799,1465170,206024,201322,391774,1622191,1096841,1055067,1323488,1122250,1391981,208685,1090108,875239)