感谢:http://www.111cn.net/database/110/d45124323da8d2d87b80f78319987eda.htm

查看同主题的另一篇博客:http://blog.csdn.net/cleanfield/article/details/41447585

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本季度的第一天 ,然后你可以把字符串再转换为日期。 方法很多,包括同一个函数的别名(同义词)也很多。比如CURDATE(),CURRENT_DATE(), CURRENT_DATE, NOW 等都可以返回当天

mysql教程> select CURDATE(),ELT(QUARTER(CURDATE()),
    ->  year(CURDATE())*1000+0101,
    ->  year(CURDATE())*1000+0401,
    ->  year(CURDATE())*1000+0701,
    ->  year(CURDATE())*1000+1001) as firstDayofQ;
+------------+-------------+
| CURDATE()  | firstDayofQ |
+------------+-------------+
| 2009-05-19 | 2009401     |
+------------+-------------+
1 row in set (0.00 sec)

mysql>

用mysql语句获取本季度的第一天

本月的第一天,
date(
concat(year(curdate()),'-',month(curdate()),'-','1'))
本周的第一天
curdate()-
WEEKDAY(curdate())

用mysql语句获取本季度的第一天

date(
concat(year(curdate()),'-',
if(quarter(curdate())=1,1,if(quarter(curdate())=2,4,if(quarter(curdate())=3,7,10))

用mysql语句获取本季度的第一天:
优化:
date(
concat(year(curdate()),'-',elt(quarter(curdate()),1,4,7,10),'-',1))

本周的第一天
date_add(date('2009-5-29'),INTERVAL -weekday('2009-5-29') day)

mysql 获取当天发布文件内容sql语句

SELECT * FROM `p8_memberdata` where regdate BETWEEN (UNIX_TIMESTAMP(NOW())-86440) AND NOW() 
SELECT * FROM `p8_memberdata` WHERE DATE_FORMAT(FROM_UNIXTIME(regdate),'%Y-%m-%d')= DATE_FORMAT(NOW(),'%Y-%m-%d') order by uid desc

05-08 15:02