t-sql将日期分配到学年

Question

我正在尝试将缺席日期分配到学年,学年是8月1日到7月31日.

所以我想要的是:
31/07/2007 = 2006/2007
02/10/2007 = 2007/2008
08/01/2008 = 2007/2008

有没有一种简单的方法在sql 2000服务器中执行此操作.

Answer 1

具有较少字符串处理的变体

SELECT
  AbsenceDate,
  CASE WHEN MONTH(AbsenceDate) <= 7 
    THEN 
      CONVERT(VARCHAR(4), YEAR(AbsenceDate) - 1) + '/' + 
      CONVERT(VARCHAR(4), YEAR(AbsenceDate))
    ELSE 
      CONVERT(VARCHAR(4), YEAR(AbsenceDate)) + '/' + 
      CONVERT(VARCHAR(4), YEAR(AbsenceDate) + 1)
  END AcademicYear
FROM
  AbsenceTable

结果:

2007-07-31 => '2006/2007' 
2007-10-02 => '2007/2008' 
2008-01-08 => '2007/2008'