在另一列mysql下分配列

Question

我有两张桌子：

project.sql
projectNo| title |
---------+-------+
17020002 | test  |
17020003 | test2 |

process.sql
projectNo| process | 
---------+---------+
17020002 | ANM     |
17020002 | BLD     |
17020003 | ANM KEY |
17020003 | BLD     |

有没有办法从mysql查询创建html表，如下所示：

|         |
+---------+
| test    |
| ANM     |
| BLD     |
| test2   |
| ANM KEY | 
| BLD     | 

我尝试的是使用UNION ALL，但它没有给我预期的结果：

SELECT title FROM project p1
UNION ALL
SELECT process FROM process p2

Answer 1

使用固定列对结果进行排序，请尝试以下操作：

SELECT title
FROM (
    SELECT projectNo, title, 0 AS a FROM project p1
    UNION ALL
    SELECT projectNo, process, 1 AS a FROM process p2) t
ORDER BY projectNo, a, title