zoukankan      html  css  js  c++  java
  • SQL2005 新功能:行列轉換

    --Create the table and insert values as portrayed in the above example.
    CREATE TABLE pvt (VendorID int, Emp1 int, Emp2 int,
    Emp3 int, Emp4 int, Emp5 int)
    GO
    INSERT INTO pvt VALUES (1,4,3,5,4,4)
    INSERT INTO pvt VALUES (2,4,1,5,5,5)
    INSERT INTO pvt VALUES (3,4,3,5,4,4)
    INSERT INTO pvt VALUES (4,4,2,5,5,4)
    INSERT INTO pvt VALUES (5,5,1,5,5,5)
    GO
    VendorID    Employee                                                                                                                         Orders
    ----------- -------------------------------------------------------------------------------------------------------------------------------- -----------
    1           Emp1                                                                                                                             4
    1           Emp2                                                                                                                             3
    1           Emp3                                                                                                                             5
    1           Emp4                                                                                                                             4
    1           Emp5                                                                                                                             4
    2           Emp1                                                                                                                             4
    2           Emp2                                                                                                                             1
    2           Emp3                                                                                                                             5
    2           Emp4                                                                                                                             5
    2           Emp5                                                                                                                             5
    3           Emp1                                                                                                                             4
    3           Emp2                                                                                                                             3
    3           Emp3                                                                                                                             5
    3           Emp4                                                                                                                             4
    3           Emp5                                                                                                                             4
    4           Emp1                                                                                                                             4
    4           Emp2                                                                                                                             2
    4           Emp3                                                                                                                             5
    4           Emp4                                                                                                                             5
    4           Emp5                                                                                                                             4
    5           Emp1                                                                                                                             5
    5           Emp2                                                                                                                             1
    5           Emp3                                                                                                                             5
    5           Emp4                                                                                                                             5
    5           Emp5                                                                                                                             5

    (25 row(s) affected)

    SELECT VendorID, Employee, Orders
     into pvt_cc FROM
       (SELECT VendorID, Emp1, Emp2, Emp3, Emp4, Emp5
       FROM pvt) p
    UNPIVOT
       (Orders FOR Employee IN
          (Emp1, Emp2, Emp3, Emp4, Emp5)
    )AS unpvt
    GO
    select * from pvt_cc
    pivot (
    sum(Orders)
    for Employee in (Emp1, Emp2, Emp3, Emp4, Emp5)
    ) as pivt

    VendorID    Emp1        Emp2        Emp3        Emp4        Emp5
    ----------- ----------- ----------- ----------- ----------- -----------
    1           4           3           5           4           4
    2           4           1           5           5           5
    3           4           3           5           4           4
    4           4           2           5           5           4
    5           5           1           5           5           5

    (5 row(s) affected)

  • 相关阅读:
    电机调速作业
    迟到的大作业模块分析
    PLC梯形图设计
    电机随笔
    好难
    电机随笔(三)
    电机随笔(二)
    电机随笔 (一)
    机电传动控制直流调速作业
    机电传动控制大作业第一阶段
  • 原文地址:https://www.cnblogs.com/Bluer/p/787026.html
Copyright © 2011-2022 走看看