Question

There are two tables

Table 1

select * from manage_tcp;
+----+----------+--------+
| id | services | statut |
+----+----------+--------+
|  2 |     1433 | up     |
|  2 |     3389 | up     |
|  3 |     3389 | down   |
|  3 |     1433 | down   |
|  9 |     3389 | up     |
|  8 |     3389 | up     |
|  7 |     1433 | up     |
|  6 |     3389 | up     |
|  5 |     3389 | up     |
|  4 |     3389 | up     |
| 10 |     1433 | up     |
| 11 |     1433 | up     |
| 12 |     3389 | up     |
| 13 |     1433 | up     |
| 14 |     3389 | up     |
| 15 |     1433 | up     |
| 16 |     3389 | up     |
| 17 |     1433 | up     |
| 18 |     3389 | up     |
| 19 |     1433 | up     |
| 20 |     3389 | up     |
| 21 |     1433 | up     |
| 24 |     1433 | up     |
| 23 |     3389 | up     |
| 25 |     3389 | up     |
| 26 |     1433 | up     |
| 29 |     1433 | up     |
| 28 |     3389 | up     |
| 30 |     3389 | up     |
| 31 |       80 | up     |
| 32 |     3389 | up     |
| 33 |       80 | up     |
| 34 |     3389 | up     |
| 35 |       80 | up     |
+----+----------+--------+
34 rows in set (0.00 sec)

Table 2

mysql> select * from manage_host;
+----+------------+-------------+--------+-------+--------------+----------+------+
| id | uptime     | type        | statut | group | thresold_ref | thresold | mail |
+----+------------+-------------+--------+-------+--------------+----------+------+
|  2 |  277248529 | win2003.png | up     |     4 |            1 |        0 | NULL |
|  3 |  277277471 | win2003.png | prob   |     4 |            1 |        0 | NULL |
|  4 |  346159833 | win2003.png | up     |     4 |            1 |        0 | NULL |
|  5 |  930205491 | win2003.png | up     |     5 |            1 |        0 | NULL |
|  6 | 3805663007 | win2003.png | up     |     5 |            1 |        0 | NULL |
|  7 |         -1 | win2003.png | up     |     4 |            1 |        0 | NULL |
|  8 |   29413867 | win2003.png | up     |     5 |            1 |        0 | NULL |
|  9 |  981986401 | win2003.png | up     |     5 |            1 |        0 | NULL |
| 10 |         -1 | win2003.png | up     |     5 |            1 |        0 | NULL |
| 11 |         -1 | win2003.png | up     |     5 |            1 |        0 | NULL |
| 12 | 2230787611 | win2003.png | up     |     7 |            1 |        0 | NULL |
| 13 |         -1 | win2003.png | up     |     7 |            1 |        0 | NULL |
| 14 | 1004161923 | win2003.png | up     |     8 |            1 |        0 | NULL |
| 15 |         -1 | win2003.png | up     |     8 |            1 |        0 | NULL |
| 16 | 1592294954 | win2003.png | up     |     8 |            1 |        0 | NULL |
| 17 |         -1 | win2003.png | up     |     8 |            1 |        0 | NULL |
| 18 | 1449216250 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 19 |         -1 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 20 | 3461945234 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 21 |         -1 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 23 | 3461946968 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 24 |         -1 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 25 | 3462022562 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 26 |         -1 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 35 | 3318333401 | win2003.png | up     |     6 |            1 |        0 |      |
| 28 | 3461879984 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 29 |         -1 | win2003.png | up     |     4 |            1 |        0 | NULL |
| 30 | 1872950109 | win2003.png | up     |     6 |            1 |        0 | NULL |
| 31 | 1872950125 | win2003.png | up     |     6 |            1 |        0 | NULL |
| 32 | 1955232033 | win2003.png | up     |     6 |            1 |        0 | NULL |
| 34 | 3318333401 | win2003.png | up     |     6 |            1 |        0 |      |
| 33 | 1955232049 | win2003.png | up     |     6 |            1 |        0 | NULL |
+----+------------+-------------+--------+-------+--------------+----------+------+
32 rows in set (0.00 sec)

I’d like to compare those two tables above and to get the results in table 1 but not in table 2 like: (this is the result i want)

+----+----------+--------+
| id | services | statut |
+----+----------+--------+
|  2 |     1433 | up     |
|  3 |     3389 | down   |
|  3 |     1433 | down   |
+----+----------+--------+

I’ve tried

SELECT a.*,b.* 
FROM manage_tcp as a 
LEFT JOIN manage_host as b 
USING(id,statut) 
WHERE b.id is null;

but I got

+----+----------+--------+
| id | services | statut |
+----+----------+--------+
|  3 |     3389 | down   |
|  3 |     1433 | down   |
+----+----------+--------+

it’s not what I want.

Thanks a lot!

Answer 1

Try this: (assume the comparison column are id and statut)

SELECT a.id, a.services, a.statut
    FROM manage_tcp a
    WHERE NOT EXISTS(SELECT b.id FROM manage_host b WHERE b.id=a.id AND b.statut=a.statut)
UNION
SELECT a.id, (SELECT services FROM manage_tcp WHERE id=a.id ORDER BY id LIMIT 1), a.statut
    FROM manage_tcp a 
    GROUP BY a.id, a.statut HAVING COUNT(1)>1

The first query will produce result from table a where not in table b.

The second, after UNION, will produce result for id that appear twice in table a.