Hello,
please let me know, if you are have some ideas about following:
----------------------------------------------------------------------------
------------------------------------------
mysql> set @a='1';
Query OK, 0 rows affected (0.00 sec)
mysql> select @a:=concat(@a,',',id) from message where id<10 and id>1;
+-----------------------+
| @a:=concat(@a,',',id) |
+-----------------------+
| 1,2 |
| 1,2,3 |
| 1,2,3,4 |
| 1,2,3,4,5 |
| 1,2,3,4,5,6 |
| 1,2,3,4,5,6,7 |
| 1,2,3,4,5,6,7,8 |
| 1,2,3,4,5,6,7,8,9 |
+-----------------------+
8 rows in set (0.01 sec)
mysql> select id from message where id in(@a);
+----+
| id |
+----+
| 1 |
+----+
1 row in set (0.00 sec)
----------------------------------------------------------------------------
------------------------------------------
Alexander
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