查找并分组同一月的所有记录，相隔一年

Question

我正在尝试按名字，姓氏和日期（按月份）对一些记录进行分组。这是到目前为止我对按姓氏/名字分组的查询：

SELECT `fundraiser_report`.`first_name` AS `first_name`, 
       `fundraiser_report`.`last_name`  AS `last_name`, 
       Count(*)                         AS `count` 
FROM   `fundraiser_report` 
GROUP  BY `fundraiser_report`.`first_name`, 
          `fundraiser_report`.`last_name` 
ORDER  BY `fundraiser_report`.`first_name` ASC, 
          `fundraiser_report`.`last_name` ASC

这里是数据的示例：

first_name|last_name|end_date
Hunter    |Cole     |11/37/2019
Hunter    |Cole     |11/20/2018
Hunter    |Cole     |11/13/2020
Andrew    |Barn     |11/37/2019
Andrew    |Barn     |11/20/2018
Andrew    |Barn     |11/13/2020
Anthony   |Jones    |3/11/2010

这些记录的所有7条都需要以这样的格式返回：

Hunter |Cole  |3
Andrew |Barn  |3
Anthony|Jones |1

Answer 1

请在MySQL中使用EXTRACT（month FROM sysdate）的等效项（已编辑，将sysdate替换为end_date）

SELECT fundraiser_report.first_name AS first_name, 
       fundraiser_report.last_name  AS last_name, 
       EXTRACT(month FROM end_date) AS month
       Count(*) AS count 
FROM   fundraiser_report 
GROUP  BY fundraiser_report.first_name, 
          fundraiser_report.last_name,
          EXTRACT(month FROM end_date)
ORDER  BY fundraiser_report.first_name ASC, 
          fundraiser_report.last_name ASC