除和除以有区别吗

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select * from tbl_Articles WHERE ArticleID=3523418 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3523418 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3523418 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1217119,3274061,545018,100493,510217,537137,1104901,3329645,985872,766222,599433,1021916,3431054,545835,636233,1119488,1230529,2960390,781052,3473807,908790,2346433,706677,741476,564474,451085,403295,2731374,2706466,3285037) ORDER BY field (ArticleID,1217119,3274061,545018,100493,510217,537137,1104901,3329645,985872,766222,599433,1021916,3431054,545835,636233,1119488,1230529,2960390,781052,3473807,908790,2346433,706677,741476,564474,451085,403295,2731374,2706466,3285037)