用C#和SQL获得当前月的第一天和最后一天

在开发过程中碰到了取当月的第一天和最后一天,在网上搜索了半天,找到一个在C#中和SQL语句的解决方法.

C# 程序代码

int year = DateTime.Now.Year;
int month = DateTime.Now.Month;

DateTime firstDayOfThisMonth = new DateTime(year, month, 1);
DateTime lastDayOfThisMonth = new DateTime(year, month, DateTime.DaysInMonth(year, month));

SQL 程序代码

DECLARE @NOW DATETIME
DECLARE @FistDayOfThisMonth DATETIME  
DECLARE @LastDayOfThisMonth DATETIME  

SET @NOW = GETDATE()
SET @FistDayOfThisMonth = @NOW - DAY(@NOW) + 1  
SET @LastDayOfThisMonth = DATEADD(MONTH, 1, @NOW - DAY(@NOW) + 1) - 1

Select @FistDayOfThisMonth
Select @LastDayOfThisMonth