为什么任何数的0次幂等于1

页面:/news/view-2731984/ | 耗时:0.1220 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=2731984 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2731984 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2731984 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1055149,1102348,1100985,1060241,1108664,1081969,1076209,1093140,1073899,1108522,1046772,1107062,1064173,1091950,1086095,1067089,1064527,1085154,1090232,1088774,1095646,1106232,1081195,1085904,1072831,1071481,1072278,1096254,1113471,1098403) ORDER BY field (ArticleID,1055149,1102348,1100985,1060241,1108664,1081969,1076209,1093140,1073899,1108522,1046772,1107062,1064173,1091950,1086095,1067089,1064527,1085154,1090232,1088774,1095646,1106232,1081195,1085904,1072831,1071481,1072278,1096254,1113471,1098403)