除法的两种类型是什么

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select * from tbl_Articles WHERE ArticleID=291537 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=291537 LIMIT 0,1
select * from tbl_Articles_sphinx where id=291537 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1081699,1105645,1091097,1106274,1080747,1063735,1052311,1110730,1069833,1050959,1100115,1118338,1124416,1117620,1088910,1065729,1124433,1097147,1069059,1126198,1086270,1074916,1090310,1132031,2811177,1110858,1096869,1115787,1065399,1081441) ORDER BY field (ArticleID,1081699,1105645,1091097,1106274,1080747,1063735,1052311,1110730,1069833,1050959,1100115,1118338,1124416,1117620,1088910,1065729,1124433,1097147,1069059,1126198,1086270,1074916,1090310,1132031,2811177,1110858,1096869,1115787,1065399,1081441)