Question

   GR_NO| Month_ID | Amount
     43 |  7 | $200.00
     43 |  8 | $300.00
     43 |  9 | $500.00

show应该是这样的

GR_NO | 7       |       8 |    9 |
43    | $200.00 | $300.00 |$500.00

Answer 1

SELECT GR_NO, [7], [8], [9]
FROM
    (SELECT GR_NO, Month, Amount From Database.schema.TableName)
    AS SourceTable
PIVOT
(
    Sum(Amount)
FOR Month IN ( [7], [8], [9])
) AS PivotTable;
--<optional ORDER BY clause>;

我通过查看数据透视表信息来研究这个答案：https://technet.microsoft.com/en-us/library/ms177410(v=sql.105).aspx

使用MSSQL

结果

GR_NO   7         8         9
43      200.00    200.00    500.00

Answer 2

由于我不知道您使用的是哪种类型的SQL，因此该示例采用MS T-SQL 2014风格。它应该与大多数其他类型的SQL类似。

SQL Fiddle

首先，我们设置测试表和数据。

MS SQL Server 2014架构设置：

CREATE TABLE t1 ( GR_NO int, Month_ID int, Amount decimal(10,2) ) ;
INSERT INTO t1 ( GR_NO, Month_ID, Amount )
VALUES 
    ( 43, 7, 200.00 )
  , ( 43, 8, 300.00 )
  , ( 43, 9, 500.00 )
  , ( 44, 2, 100.00 )
  , ( 43, 2, 250.00 )  /* Out of cycle */
  , ( 43, 4, 10.00 )  /* Aggregate 1 */
  , ( 43, 4, 10.00 )  /* Aggregate 2 */
;

这是您的Pivot查询：

SELECT p.GR_NO
  , p.[1] AS Jan
  , p.[2] AS Feb
  , p.[3] AS Mar
  , p.[4] AS Apr /* Look at aggregated example. */
  , p.[5] AS May
  , p.[6] AS Jun
  , p.[7] AS Jul
  , p.[8] AS Aug
  , p.[9] AS Sep
  , p.[10] AS Oct
  , p.[11] AS Nov
  , p.[12] AS Dec 
  /* After the pivot, columns come from p. */
FROM (
  SELECT GR_NO, Month_ID, Amount
  FROM t1
  /* Source table for pivoting data. */
) s
PIVOT (
  SUM(Amount) /* Has to be an aggregate function. */
  FOR Month_ID IN ([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])
  /* These are the fields you'd like to end up in the pivot. */
) p

这给了我们：

<强> Results ：

| GR_NO |    Jan | Feb |    Mar |    Apr |    May |    Jun |    Jul |    Aug |    Sep |    Oct |    Nov |    Dec |
|-------|--------|-----|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|
|    43 | (null) | 250 | (null) |     20 | (null) | (null) |    200 |    300 |    500 | (null) | (null) | (null) |
|    44 | (null) | 100 | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) | (null) |

https://www.techonthenet.com/sql_server/pivot.php

在具有多列的单行中显示多个行值

2 个答案: