Using COUNT in GROUP_CONCAT

Question

This is my table:

  id  | fk_company
-------------------
  1   |     2    
  2   |     2    
  3   |     2    
  4   |     4    
  5   |     4    
  6   |     11          


        

Answer 1

You need to COUNT() with GROUP BY in an inner SELECT clause first and then apply GROUP_CONCAT();

SELECT GROUP_CONCAT(cnt) cnt
FROM (
    SELECT COUNT(*) cnt
    FROM table1
    GROUP BY fk_company
) q;

Output:

|   CNT   |
-----------
| 3,2,3,1 |

Here is SQLFiddle demo.

Answer 2

Just use count(id)

SELECT id, COUNT(id) as total
FROM `table` GROUP BY fk_company;

Answer 3

select GROUP_CONCAT(counts) 
   from (
      select count(id) counts from
          table group by fk_company
   );

Answer 4

SELECT A,  
GROUP_CONCAT(B SEPARATOR '/') AS 'Category',  
GROUP_CONCAT(C SEPARATOR '/') AS 'ALIAS_NAME',COUNT('ALIAS_NAME') AS 'Count'  
FROM carnews  
...  
...
GROUP BY 1
ORDER BY 4 DESC  

This works well in my case.

Answer 5

You can also achieve that by counting the number of commas (or whatever's your separator) in the GROUP_CONCAT:

SELECT (LENGTH(GROUP_CONCAT(DISTINCT fk_company))-LENGTH(REPLACE(GROUP_CONCAT(DISTINCT fk_company), ',', '')))
FROM `table`
GROUP BY fk_company