一行中有多个列值

Question

我有这样的桌子

    ID    Status
     1    5
     1    6
     1    7
     2    5
     2    6
     2    7

我需要如下结果

     ID      col1    col2    col3
     1        5       6       7
     2        5       6       7

请帮我

Answer 1

SELECT  ID,
        MAX(CASE WHEN status = 5 THEN Status ELSE NULL END) col1,
        MAX(CASE WHEN status = 6 THEN Status ELSE NULL END) col2,
        MAX(CASE WHEN status = 7 THEN Status ELSE NULL END) col3
FROM    tableNAME
GROUP   BY ID

• SQLFiddle演示

使用 PIVOT

SELECT *
FROM   (
          SELECT ID, Status, CASE Status 
                              WHEN 5 THEN 'Col1'
                              WHEN 6 THEN 'Col2'
                              WHEN 7 THEN 'Col3'
                            END Stat
          FROM tableName
        ) src
        PIVOT
        (
          MAX(Status)
          FOR Stat IN ([Col1],[Col2],[Col3])
        ) pivotTbl

• SQLFiddle演示