Question

I have got this kind of table

| SessionId | Action |
----------------------
| 1         | LOGIN  |
| 1         | INDEX  |
| 3         | LOGIN  |
| 1         | SHOW   |
| 3         | DELETE |
| 1         | INSERT |
| 6         | LOGIN  |
| 3         | LOGOUT |
| 5         | LOGIN  |

I need to fetch count of all actions without LOGIN for each SessionId which has got LOGIN action.

| SessionId | count |
---------------------
| 1         | 3     |
| 3         | 2     |
| 5         | 0     |
| 6         | 0     |

And I am using sql server now (Mysql syntax will be ok)

Answer 1

EDIT: Added LEFT JOIN so that SessionId values 5 and 6 are included in the results. This also has the benefit of eliminating the subquery.

SELECT t.SessionId, COUNT(tc.Action)
    FROM YourTable t
        LEFT JOIN YourTable tc
            ON t.SessionId = tc.SessionId
                AND tc.Action <> 'LOGIN'
    WHERE t.Action = 'LOGIN'
    GROUP BY t.SessionId;