计算小数加减法时要注意什么

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select * from tbl_Articles WHERE ArticleID=1590994 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1590994 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1590994 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1080799,1062959,1066704,1004919,1066812,1060829,1076490,1058958,1086518,1070939,1065485,996794,1081195,1114456,1072082,1050037,1080251,1064345,1065107,1077904,1085955,1041439,1072093,1047980,1071645,1069505,1071265,1080114,1058213,1123769) ORDER BY field (ArticleID,1080799,1062959,1066704,1004919,1066812,1060829,1076490,1058958,1086518,1070939,1065485,996794,1081195,1114456,1072082,1050037,1080251,1064345,1065107,1077904,1085955,1041439,1072093,1047980,1071645,1069505,1071265,1080114,1058213,1123769)