Question

我是SQL的初学者。我想将一些列转换为视图中的行，这是我的观点：

SLPRSNID    ITEMNMBR        1       2       3     4     5
1           01-GOGUA-010    0       500     500   500   500
4           01-GOGUA-020    1850    3850    2350  4450  2450

我需要：

SLPRSNID    ITEMNMBR        VOLUME
1           01-GOGUA-010    2000
4           01-GOGUA-020    14950

我用过：

SELECT ITEMNMBR, VOLUMEN
FROM dbo.SOPPPTOVOL
UNPIVOT
(
    VOLUMEN
    FOR ITEMNMBR IN ([1], [2], [3], [4], [5]) 
) AS UnPvt

但它没有用。

Answer 1

使用APPLY

DECLARE @table table (
SLPRSNID INT ,
ITEMNMBR VARCHAR(50),
[1] FLOAT,
[2] FLOAT,
[3] FLOAT,
[4] FLOAT,
[5] FLOAT
)

INSERT INTO @table 
 VALUES (1, '01-GOGUA-010', 0.00,500.00,500.00,500.00,500.00),
        (4, '01-GOGUA-020', 1850.0,3850.00,2350.00,4450.00,2450.00)


SELECT T.SLPRSNID,T.ITEMNMBR, P.VOLUME
FROM @table T
  CROSS APPLY 
        (
         SELECT SUM(X.VAL)
         FROM
            (
             VALUES  ([1]),([2]),([3]),([4]),([5])  
            ) X(VAL)
        ) P(VOLUME)

使用UNPIVOT

DECLARE @table table (
SLPRSNID INT ,
ITEMNMBR VARCHAR(50),
[1] FLOAT,
[2] FLOAT,
[3] FLOAT,
[4] FLOAT,
[5] FLOAT
)

INSERT INTO @table 
VALUES (1, '01-GOGUA-010', 0.00,500.00,500.00,500.00,500.00),
       (4, '01-GOGUA-020', 1850.0,3850.00,2350.00,4450.00,2450.00)

SELECT E.SLPRSNID , E.ITEMNMBR , SUM(E.VOL) VOLUME
FROM @table T 
    UNPIVOT 
        (
        VOL FOR VALS IN ([1],[2],[3],[4],[5]) 
        ) E
GROUP BY  E.SLPRSNID , E.ITEMNMBR

如何正确使用Unpivot

1 个答案: