Mysql 时间函数的统计

MySQL 的 YEARWEEK 是获取年份和周数的一个函数，函数形式为 YEARWEEK(date[,mode])

例如 2010-3-14 ，礼拜天

SELECT YEARWEEK('2010-3-14') 返回 11
SELECT YEARWEEK('2010-3-14',1) 返回 10

其中第二个参数是 mode ，具体指的意思如下：

Mode	First day of week	Range	Week 1 is the first week …
0	Sunday	0-53	with a Sunday in this year
1	Monday	0-53	with more than 3 days this year
2	Sunday	1-53	with a Sunday in this year
3	Monday	1-53	with more than 3 days this year
4	Sunday	0-53	with more than 3 days this year
5	Monday	0-53	with a Monday in this year
6	Sunday	1-53	with more than 3 days this year
7	Monday	1-53	with a Monday in this year

例子：

1、查询本周的数据：

<select id="getAgentAuditCount" parameterType="java.util.Map" resultType="java.lang.Long">
  select count(*) from hzf_agent_info where  1=1
  <if test="auditStatus != null" >
    and audit_status = #{auditStatus}
  if>
  <if test="timeStamp == 7" >
    and YEARWEEK(date_format(register_time,'%Y-%m-%d'),1) = YEARWEEK(now(),1)
  if>
  <if test="timeStamp == 1" >
    and to_days(register_time) = to_days(now())
  if>
select>

2、获取上周的数据：

<select id="getBridgeInfoByWeek" parameterType="String" resultMap="BaseResultMap">
  select * from bridge_info
  WHERE apply_user = #{applayUser}
  and status = 4
  and YEARWEEK(date_format(apply_date,'%Y-%m-%d'),1) = YEARWEEK(now(),1)-1
select>