mysql数据库获取年龄:TIMESTAMPDIFF(YEAR, [出生日期字段], CURDATE()) select * from (select name 姓名,TIMESTAMPDIFF(YEAR, [出生日期字段], CURDATE()) 年龄 from [表名] )a; sqlserver数据库获取年龄:DATEDIFF(yy,[出生日期字段],GETDATE()) select id AS 编号,SStudentName AS 姓名,DATEDIFF(yy,[出生日期字段],G
1.日期和字符转换函数用法(to_date,to_char)select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') as nowTime from dual; //日期转化为字符串 select to_char(sysdate,'yyyy') as nowYear from dual; //获取时间的年 select to_char(sysdate,'mm') as nowMonth from dual; //获取时间的月 select to_char(s
,) ), Sales int,Dates datetime) insert into ProductSale ,'2014-01-05' UNION ALL ,'2014-02-05' UNION ALL ,'2014-03-05' UNION ALL ,'2014-01-05' UNION ALL ,'2014-03-05' UNION ALL ,'2014-04-05' ) Sales,b.Dates ) b left join ProductSale as c on b.年=YEAR(c