十六进制中48加49等于多少

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select * from tbl_Articles WHERE ArticleID=3013809 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3013809 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3013809 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2855491,3333110,255233,2202987,1278010,3420555,3081067,2992738,317340,1053404,1692321,1123387,1091332,403118,1912623,1736342,1047411,1129395,625313,1092868,1672861,1128565,1980373,3070854,1048280,1122204,459257,1858436,2920121,1097895) ORDER BY field (ArticleID,2855491,3333110,255233,2202987,1278010,3420555,3081067,2992738,317340,1053404,1692321,1123387,1091332,403118,1912623,1736342,1047411,1129395,625313,1092868,1672861,1128565,1980373,3070854,1048280,1122204,459257,1858436,2920121,1097895)