oracle中怎样以年为参数求出每个月数据的平均值以及月的最大值最小值

Posted 2023-05-10

参考技术A select month_no,avg(value) vag_value,max(value) max_value,min(value) min_value from table_name where substr(month_no,1,4)='year' group by month_no

year是年参数，month_no是月份参数，varchar2型，如果是时间类型,比如load_timeselect to_char(load_time,'yyyymm') month_no,avg(value) vag_value,max(value) max_value,min(value) min_value from table_name where to_char(load_time,'yyyy') ='year' group by to_char(load_time,'yyyymm')本回答被提问者采纳

给定出生日期的年龄（以年为单位）

Given a birthdate in @dob, here are two simple formulae for age in years :
(the second formulae is for age in years to two decimal places, ignoring day of month)

#1
 
DATE_FORMAT( FROM_DAYS( TO_DAYS(CURDATE()) - TO_DAYS(@dob) ), '%Y' ) + 0 
YEAR(CURDATE()) - YEAR(@dob) - ( RIGHT(CURDATE(),5) < RIGHT(@dob,5) ) 
 
#2
ROUND((((YEAR(NOW()) - YEAR(@dob)))*12 + (((MONTH(NOW()) - MONTH(@dob)))))/12, 2)