MySQL列到行

Question

  

可能重复：
  MYSQL - Rows to Columns

我在MySQL中有下表：

Original Table

是否有人知道如何在表格上进行选择以获得以下结果：

GivenName | FamilyName | EMailHome       | PhoneNrHome
--------------------------------------------------------
Angus     | Young      | angus@gmail.com | (123) 456 789 

因此，链接到同一UserID的字段应按列排列。

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Answer 1

Please try self as per below example :

SELECT  
  IFNULL(empId,'Totals') AS EmpId,       -- outer query labels rollup row 
  sums.2005, sums.2006, sums.2007,       -- and calculates horizontal sums 
  sums.2005 + sums.2006 + sums.2007 AS Sums 
FROM (                                   -- inner query groups by employee 
  SELECT                                 -- with an expression for each column 
    EmpID, 
    SUM(IF(Yr=2005,sales,0)) As '2005', 
    SUM(IF(Yr=2006,sales,0)) As '2006', 
    SUM(IF(Yr=2007,sales,0)) As '2007' 
  FROM Sales 
  GROUP BY EmpID WITH ROLLUP 
) AS sums; 
+--------+----------+----------+----------+-----------+ 
| EmpId  | 2005     | 2006     | 2007     | Sums      | 
+--------+----------+----------+----------+-----------+ 
| 1      | 12000.00 | 18000.00 | 25000.00 |  55000.00 | 
| 2      | 15000.00 |  6000.00 |     0.00 |  21000.00 | 
| 3      |     0.00 | 20000.00 | 24000.00 |  44000.00 | 
| Totals | 27000.00 | 44000.00 | 49000.00 | 120000.00 | 
+--------+----------+----------+----------+-----------+