摘要: oracle 求标准偏差:select STDdEV(column1) from (select 50 column1 from dualunion select 90 from dualunion select 70 from dual) ttsqlserver 里求标准偏差:select STDEV(column1) from (select 50 column1 union select 9... 阅读全文
posted @ 2009-07-24 16:07 左少白 阅读(922) 评论(0) 推荐(0) 编辑