获取当前月的第一天和最后一天...
set @F_d = convert(varchar(10),dateadd(dd,-day(getdate())+1,getdate()),120)
set @E_d = convert(varchar(10),dateadd(dd,-day(getdate()),dateadd(m,1,getdate())),120)
set @F_d = convert(varchar(10),dateadd(dd,-day(getdate())+1,getdate()),120)
set @E_d = convert(varchar(10),dateadd(dd,-day(getdate()),dateadd(m,1,getdate())),120)