行を列に転記するにはどうすればよいですか？

Question

おそらく単純なものですが、データをすばやく転置して行単位ではなく横方向に読み込む方法があります。上記

電流出力ですが、例えば全体で、それは読みたい

AttendanceNumber, ExamDate, ExamCode1, ExamCode2, ExamCode3, .......ExamCode20 

私のSQLでは、ROW_NUMBER()との条件付き集約を使用することができます

SELECT [AttendanceNumber] 
     ,[ExaminationDate] 
     ,[ExamExaminationCode] 
    FROM [Radiotherapy].[dbo].[tblRadiologyData] rd 
    where rd.ExaminationDate >= '01 april 2016' 
    and rd.AttendanceSiteCode IN('CNM','RNM') 
    ORDER BY rd.LocalPatientIdentifier, rd.ExaminationDate 

Answer 1

です：

SELECT s.attendanceNumber,s.examinationDate, 
     MAX(CASE WHEN s.rnk = 1 THEN s.ExamExaminationCode END) as examCode1, 
     MAX(CASE WHEN s.rnk = 2 THEN s.ExamExaminationCode END) as examCode2, 
     MAX(CASE WHEN s.rnk = 3 THEN s.ExamExaminationCode END) as examCode3, 
     ..... As many as you need 
FROM (
    SELECT [AttendanceNumber] 
      ,[ExaminationDate] 
      ,[ExamExaminationCode] 
      ,ROW_NUMBER() OVER(PARTITION BY [AttendanceNumber] ORDER BY [ExaminationDate]) as rnk --Ordered by date ASC 
     FROM [Radiotherapy].[dbo].[tblRadiologyData] rd 
     where rd.ExaminationDate >= '01 april 2016' 
     and rd.AttendanceSiteCode IN('CNM','RNM')) s 
GROUP BY s.attendanceNumber,s.examinationDate