按周统计数据，并获取本周第一天与本周最后一天

SELECT  DATE_FORMAT(CREATE_TIME,'%Y%u') weeks,CONVERT(CREATE_TIME,CHAR(10)) AS createTime,
	 
	(SELECT DATE_ADD(createTime,INTERVAL - WEEKDAY(createTime) DAY)) AS firstDayForWeek,

	(SELECT DATE_ADD(createTime,INTERVAL - WEEKDAY(createTime)+6 DAY)) AS lastDayForWeek,

	DATE_FORMAT((SELECT DATE_ADD(createTime,INTERVAL - WEEKDAY(createTime) DAY)),'%m.%d') AS firstDayForWeekFormat,

	DATE_FORMAT((SELECT DATE_ADD(createTime,INTERVAL - WEEKDAY(createTime)+6 DAY)),'%m.%d') AS lastDayForWeekFormat

	FROM cl_topic WHERE 1=1 GROUP BY weeks;

注意：

1、  DATE_FORMAT(CREATE_TIME,'%Y%u')    这种写法星期一是本周的第一天 。