mysql中关于日期的一些sql语句

在公司做功能时，有这样一个功能，当天提现不能超过设定值，当月转账不能不能超过设定值。这样就需要查询当天和当月的数据。所以总结了一些关于日期的函数。

查询当前这周的数据

 SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now());    

查询上周的数据

SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1; 

查询当前月份的数据

 select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m') 

查询距离当前现在6个月的数据

 select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now(); 

查询上个月的数据

  select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m')   select * from `user` where DATE_FORMAT(pudate,'%Y%m') = DATE_FORMAT(CURDATE(),'%Y%m') ;   select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = WEEKOFYEAR(now())   select * from user  where MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now())   select * from [user] where YEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = YEAR(now()) and         MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now())   select * from [user]  where pudate between 上月最后一天  and 下月第一天 

判断当天日期记录：

 SELECT count(*) FROM zyzs_money_record WHERE DATEDIFF(createDate,NOW())=0

日期类型和字符串的转换

Date date=new Date();  //日期格式： SimpleDateFormat from=new SimpleDateFormat("yyyy-MM-dd"); String da=from.format(date); //变成字符串Date d = from.parse(da);//将字符串变成日期类型dd.getDate();