Question

I have a table named test with below values. I want to fetch how many users are using open id.

----+----------+-----------+
| NAME   | PROVIDER | OPERATION |
+--------+----------+-----------+
| Samuel | Google   | P         |
| Samuel | Google   | V         |
| Kannan | Google   | V         |
| George | Google   | V         |
| Bush   | Google   | V         |
| Bush   | Yahoo    | V         |
+--------+----------+-----------+

Query: select distinct(Name) from test group by PROVIDER

Result:

+-----------------------+----------+  
| count(distinct(NAME)) | PROVIDER |  
+-----------------------+----------+  
|                     4 | Google   |  
|                     1 | Yahoo    |  
+-----------------------+----------+

In this query I want to ignore the count which a user operation is P for a PROVIDER . How can I do this in a single query?

Output should be

+-----------------------+----------+
| count(distinct(NAME)) | PROVIDER |
+-----------------------+----------+
|                     3 | Google   |
|                     1 | Yahoo    |
+-----------------------+----------+

Answer 1

try this,

SELECT  `Provider`, COUNT(DISTINCT Name)
FROM    tableName
WHERE   NAME NOT IN
            (
                SELECT Name
                FROM tableName
                WHERE Operation = 'P'
            )
GROUP BY Provider

SQLFiddle Demo