4
configuration:MySQL problème de requête
mysql> create table main(id integer unsigned);
mysql> create table test1(id integer unsigned,body text);
Query OK, 0 rows affected (0.84 sec)
mysql> insert into main(id) value(1);
Query OK, 1 row affected (0.16 sec)
mysql> insert into test1(id,body) value(1,'something1');
Query OK, 1 row affected (0.27 sec)
mysql> insert into test1(id,body) value(1,'something2');
Query OK, 1 row affected (0.00 sec)
En utilisant
mysql> select main.id,body from main
-> left join test1 on main.id=test1.id
-> group by main.id;
retours:
+------+------------+
| id | body |
+------+------------+
| 1 | something1 |
+------+------------+
1 row in set (0.02 sec)
Comment obtenir concaténation du corps de test1 avec espace commun, pour obtenir "something1 something2" ?