根据时间搜索数据

上日数据

convert(int,convert(char(10),create_date,112)) =convert(int,convert(char(10),dateadd(day,-1,getdate()),112))

//这月的企业

select *from eb_company where is_company=1 and

convert(int,substring(convert(char(10),create_date,112),1,6))>=convert(int,substring(convert(char(10),getdate(),112),1,6))

//上月的企业

select *from eb_company where is_company=1 and

convert(int,substring(convert(char(10),create_date,112),1,6))>=convert(int,substring(convert(char(10),dateadd(month,-1,dateadd(dd,-datepart(dd,getdate())+1,getdate())),112),1,6))

and convert(int,substring(convert(char(10),create_date,112),1,6))<convert(int,substring(convert(char(10),dateadd(month,0,dateadd(dd,-datepart(dd,getdate())+1,getdate())),112),1,6))

//获取当前月份

int month = db.CountBySQL("select month(getdate()) ");

//根据年份与月份获取当月最后一天

int day = db.CountBySQL("select day (dateadd(day,-1,dateadd(month,1,'" + year + "-" + month + "'+'-01')))");