将一列中的数据分成多列

Question

我有一张表格，里面装满了学生的考勤数据，我们正在迁移到另一个学生信息系统，他们希望平面文件的格式是每个学生每天一行所有7个时期列出。现在，我们的数据每个时期每天存储一条记录（请参阅附加模式）对这些数据进行格式设置以符合我上面列出的内容的最佳方式是什么？我还附上他们想要的截图（每一行都是一列）。

新增数据的截屏。

Answer 1

好了，所以支点是我需要的不是什么。我最终与一位收藏家谈论了我的问题，他告诉我使用子查询。所以这就是我解决它的方法！

select distinct student_id,school_year,school_number,absent_date, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='H') as daily_code, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='1') as per_1, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='2') as per_2, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='3') as per_3, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='4') as per_4, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='5') as per_5, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='6') as per_6, 
(select absent_code from attend_student_detail a2 where a2.student_id=a.student_id and a2.absent_date=a.absent_date and a2.absent_period='7') as per_7 

FROM attend_student_detail a 

Order By Absent_Date, Student_ID 

Answer 2

看看PIVOT和UNPIVOT。

Here就是一个例子