簡單的方法將每6行轉換爲Sql中的列1,2,3等等？

Question

謝謝你的幫忙！我真的不知道該怎麼做..

Answer 1

使用PIVOT的行轉換爲列。

看看www.artfulsoftware.com/infotree/qrytip.php?id=78例子;

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 | 
+--------+----------+----------+----------+-----------+