Question

I have Emp table with following values

Emp_Id  Emp_Name    Subject        Dates
001      Smith      Java         07-02-2012
001      Smith      oracle       08-02-2012
001      smith      C++          10-02-2012
002      john       java         01-01-2012
002      john       SE           10-01-2012
002      john       c            10-01-2012  
001      smith      physics      04-01-2012
001      smith      c#           07-02-2012
001      smith     javascript    07-02-2012 

Now as we can see here smith studied only 3 days for month February and 1 for month Jan
while john studied only 2 days for month January.

How can we calculate this count for any employee?
As a e.g:Output should be in following way.

Emp_Id   Emp_Name  Month_Year   No_Of_Days_Studied_In_Month
001      smith      Feb12                 3
001      smith      Jan12                 1
002      john       Jan12                 2

Answer 1

You can GROUP BY YEAR(Dates), MONTH(Dates) and do a COUNT.

TRY:

SELECT emp_id,
       emp_name,
       Date_format(DATE, '%b%y') AS dates,
       COUNT(*) AS No_Of_Days_Studied_In_Month
FROM   emp
GROUP  BY Date_format(DATE, '%b%y'), emp_name
ORDER  BY emp.emp_id