排列数和组合数的区别

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select * from tbl_Articles WHERE ArticleID=1291134 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1291134 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1291134 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1086338,1100497,1084197,1131187,1132771,1082306,1016441,986336,1086530,1027251,1063671,1125580,1095812,1051535,1048224,1050843,1092040,1049836,1107118,1074306,1093641,1104657,1063309,1100639,1094053,1071243,1044426,1086698,1081065,336525) ORDER BY field (ArticleID,1086338,1100497,1084197,1131187,1132771,1082306,1016441,986336,1086530,1027251,1063671,1125580,1095812,1051535,1048224,1050843,1092040,1049836,1107118,1074306,1093641,1104657,1063309,1100639,1094053,1071243,1044426,1086698,1081065,336525)