减法怎么教

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select * from tbl_Articles WHERE ArticleID=813499 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=813499 LIMIT 0,1
select * from tbl_Articles_sphinx where id=813499 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1871752,402839,135543,364650,467352,426671,489894,433908,493011,468308,464944,86222,3502331,433326,511652,513480,365170,436492,366801,506088,500006,424728,542814,409389,535384,453929,453201,363309,552177,520433) ORDER BY field (ArticleID,1871752,402839,135543,364650,467352,426671,489894,433908,493011,468308,464944,86222,3502331,433326,511652,513480,365170,436492,366801,506088,500006,424728,542814,409389,535384,453929,453201,363309,552177,520433)