SQL query

No group by applied -
select id_seed, id_campaign, id_chat from messages where id_campaign = 140;
+------------+-------------+----------------------------------------+
| id_seed    | id_campaign | id_chat                                |
+------------+-------------+----------------------------------------+
| 4102593936 |         140 | a6ab87684aa1a90dff7ea61cf618d3f9CCC140 |
| 4102593936 |         140 | 0d60b2a4a79938b07ac39b977a96efc4CCC140 |
| 4102593936 |         140 | d5b6712b51878a2f37e7004bc5b57171CCC140 |
| 4102593936 |         140 | d2f5fc4c1d7d9d95cfd4846234f6aad3CCC140 |
| 4102593936 |         140 | 1118cb4436f5e5d03f4805d0b9e8bf3eCCC140 |
| 4075174669 |         140 | 12d59be001fc6d795c2da5f9456b41afCCC140 |
| 4075174669 |         140 | d09d4cf87e5d8b2c3efcfea1fd94f9eaCCC140 |
| 4075174669 |         140 | d09d4cf87e5d8b2c3efcfea1fd94f9eaCCC140 |
| 4075174669 |         140 | ace48ab48c4409e6307a2dc55856ce72CCC140 |
| 4102593936 |         140 | 2032e80ca46bca4a5d97f2da92e9f7b1CCC140 |
| 4102593936 |         140 | 2032e80ca46bca4a5d97f2da92e9f7b1CCC140 |
| 4102593936 |         140 | 2032e80ca46bca4a5d97f2da92e9f7b1CCC140 |
| 4102593936 |         140 | 2032e80ca46bca4a5d97f2da92e9f7b1CCC140 |
| 4102593936 |         140 | 2032e80ca46bca4a5d97f2da92e9f7b1CCC140 |
+------------+-------------+----------------------------------------+

after group by applied -
select id_seed, id_campaign, id_chat from messages where id_campaign = 140 group by id_chat;
+------------+-------------+----------------------------------------+
| id_seed    | id_campaign | id_chat                                |
+------------+-------------+----------------------------------------+
| 4102593936 |         140 | 0d60b2a4a79938b07ac39b977a96efc4CCC140 |
| 4102593936 |         140 | 1118cb4436f5e5d03f4805d0b9e8bf3eCCC140 |
| 4075174669 |         140 | 12d59be001fc6d795c2da5f9456b41afCCC140 |
| 4102593936 |         140 | 2032e80ca46bca4a5d97f2da92e9f7b1CCC140 |
| 4102593936 |         140 | a6ab87684aa1a90dff7ea61cf618d3f9CCC140 |
| 4075174669 |         140 | ace48ab48c4409e6307a2dc55856ce72CCC140 |
| 4075174669 |         140 | d09d4cf87e5d8b2c3efcfea1fd94f9eaCCC140 |
| 4102593936 |         140 | d2f5fc4c1d7d9d95cfd4846234f6aad3CCC140 |
| 4102593936 |         140 | d5b6712b51878a2f37e7004bc5b57171CCC140 |
+------------+-------------+----------------------------------------+

peter's example here, which gives total count -
elect count(*) as c, id_seed from messages where id_campaign = 140 group by id_seed;
+----+------------+
| c  | id_seed    |
+----+------------+
|  4 | 4075174669 |
| 10 | 4102593936 |
+----+------------+

my shot at it where i'm trying to count the records that show up after the group by is applied. note how the same values show up twice instead of adding together...?? -
select distinct count(id_seed) as c, id_seed from messages where id_campaign = 140 group by id_chat, id_seed;
+---+------------+
| c | id_seed    |
+---+------------+
| 1 | 4075174669 |
| 5 | 4102593936 |
| 1 | 4102593936 |
| 2 | 4075174669 |
+---+------------+

here's the final result i'm trying to get -
+---+------------+
| c | id_seed    |
+---+------------+
| 3 | 4075174669 |
| 6 | 4102593936 |
+---+------------+