SQL選擇爲表中的每列返回2行一列

Question

請原諒我制定合適標題的能力。

我與列的表：

+-------+----------+------+-----+---------+-------+ 
| Field | Type  | Null | Key | Default | Extra | 
+-------+----------+------+-----+---------+-------+ 
| name | char(20) | YES |  | NULL |  | 
| pri | int(11) | YES |  | NULL |  | 
| sec | int(11) | YES |  | NULL |  | 
+-------+----------+------+-----+---------+-------+ 

與數據，如

+--------+------+------+ 
| name | pri | sec | 
+--------+------+------+ 
| first | 1 | 2 | 
| second | 3 | 4 | 
| third | 5 | 6 | 
+--------+------+------+ 

我想一個選擇，這將使結果：

+--------+------+ 
| name | addr | 
+--------+------+ 
| first | 1 | 
| first | 2 | 
| second | 3 | 
| second | 4 | 
| third | 5 | 
| third | 6 | 
+--------+------+ 

任何幫助不勝感激。

Answer 1

演示試試這個

SELECT name, pri AS addr 
FROM Table1 
WHERE pri is NOT NULL 

UNION ALL 

SELECT name, sec AS addr 
FROM Table1 
WHERE sec is NOT NULL 

order by 1,2 

Answer 2

像這樣將返回結果集指定：

SELECT p.name 
    , p.pri AS addr 
    FROM mytable p 
UNION ALL 
SELECT s.name 
    , s.sec AS addr 
    FROM mytable s 
ORDER BY 2 ASC 

Answer 3

如果你UNION查詢像下面。看到這裏http://sqlfiddle.com/#!2/b4338/2

select name, pri as addr 
from table1 

union all 

select name, sec as addr 
from table1 
order by addr