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mysql GROUP_CONCAT

2014-03-01 05:01 302 查看

table 1:

+----+---------+
| id | content |
+----+---------+
|  1 | num1    |
|  2 | num2    |
|  3 | num3    |
|  4 | num4    |
|  5 | num5    |
+----+---------+

table 2:

+----------+---------+-----------+
| appln_id | pers_id | pers_name |
+----------+---------+-----------+
|        1 |       1 | Jack      |
|        2 |       2 | Mill      |
|        2 |       3 | Zach      |
|        3 |       4 | Wong      |
|        3 |       5 | Lee       |
|        3 |       6 | Bill      |
|        4 |       7 | Pill      |
|        5 |       8 | Fee       |
|        5 |       9 | Grr       |
+----------+---------+-----------+

SQL query:

select a.id, a.content, GROUP_CONCAT(p.pers_name) from appln as a left join persons as p on a.id= p.appln_id group by a.id;

result:

+----+---------+---------------------------+
| id | content | GROUP_CONCAT(p.pers_name) |
+----+---------+---------------------------+
|  1 | num1    | Jack                      |
|  2 | num2    | Mill,Zach                 |
|  3 | num3    | Wong,Lee,Bill             |
|  4 | num4    | Pill                      |
|  5 | num5    | Fee,Grr                   |
+----+---------+---------------------------+

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