sqlserver求标准偏差,oracle求标准偏差 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 90 union select 70 ) tt