Mysql日常函数备忘

备注：

其中Intolib为表的名称，inputtime为类型伟Datetime的字段

查询当天记录：

select * from intolib where to_days(inputtime) = to_days(now())

查询这个星期的记录：

select * from intolib where week(inputtime,1) = week(now(),1) and year(inputtime) = year(now())

查询本月记录：

select * from intolib where month(inputtime) = month(curdate()) and year(inputtime) = year(now())

查询上月记录：

select * from intolib where month(inputtime)=month(curdate())-1 and year(inputtime)=year(now())

对比的MSSQL语句：

查询当天记录（c#语句)：

string strTemp = "";
 if (rbToday.Checked)
      strTemp = "dd";
 if (rbWeek.Checked)
      strTemp = "ww";
 if (rbMonth.Checked)
      strTemp = "mm";

 string strSql = "select * from intolib where datediff(" + strTemp + ",inputtime,getdate())<1";

上月记录：
    strSql = "select * from intolib where datediff(mm,inputtime,getdate())<2";