如何使三个表与mySQL中的主键共享相同的字段？

Question

如何让我的三个表共享相同的“part_no”字段作为主键？我需要使用三个不同的表访问“part_no”。怎么样？他们必须是同一个名字吗？

 TABLE NAME:  cartons_current
 +------------+--------------+--------+--------+-------------------+------------+
 | Column     |  Type        |  Null  |  Key   |  Default          |  Extra     |
 +------------+--------------+--------+--------+-------------------+------------+
 | part_no    | varchar(20)  |  No    |  Prim  |                   |            |
 | qty        | int(8)       |  No    |        |                   |            |
 | qty_time   | timestamp    |  No    |        | CURRENT_TIMESTAMP |            |
 +------------+--------------+--------+--------+-------------------+------------+

 TABLE NAME:  cartons_add
 +------------+--------------+--------+--------+-------------------+------------+
 | Column     |  Type        |  Null  |  Key   |  Default          |  Extra     |
 +------------+--------------+--------+--------+-------------------+------------+
 | part_no    | varchar(20)  |  No    |  Prim  |                   |            |
 | add_qty    | int(8)       |  No    |        |                   |            |
 | add_time   | timestamp    |  No    |        | CURRENT_TIMESTAMP |            |
 +------------+--------------+--------+--------+-------------------+------------+

 TABLE NAME:  cartons_pull
 +------------+--------------+--------+--------+-------------------+------------+
 | Column     |  Type        |  Null  |  Key   |  Default          |  Extra     |
 +------------+--------------+--------+--------+-------------------+------------+
 | part_no    | varchar(20)  |  No    |  Prim  |                   |            |
 | pull_qty   | int(8)       |  No    |        |                   |            |
 | pull_time  | timestamp    |  No    |        | CURRENT_TIMESTAMP |            |
 +------------+--------------+--------+--------+-------------------+------------+

Answer 1

如果要选择共享主键的记录，请使用以下选择。

SELECT cc.part_no, cc.qty, cc.qty_time
                 , ca.add_qty as qty_added, ca.add_time as time_added
                 , cp.pull_qty as qty_pulled, cp.pull_time as time_pulled
FROM cartons_current cc
INNER JOIN cartons_add ca ON (ca.part_no = cc.part_no)
INNER JOIN cartons_pull cp ON (cp.part_no = cc.part_no)
WHERE cc.part_no = '124'