Count data in every month - php

Question

I've already research this in other question but I didn't get an answer so decide to ask here.
I have 2 tables which is the tblCourse and tblData, I have been storing all of my course list in tblCourse while in tblData I am storing the person name and what course they took. Now, what I want to do is, I want to get the total count of all the person who are taking a particular course in every month.
For example:
----------------------------------------------------------------------------
Course | Jan | feb | Mar | Apr | May | ......................| Dec | Total |
----------------------------------------------------------------------------
Course1 | 2 | 3 | 0 | 0 | 1 | ......................| 2 | 8 |
----------------------------------------------------------------------------
Course2 | 2 | 3 | 2 | 0 | 1 | ......................| 2 | 10 |
----------------------------------------------------------------------------
Course3 | 2 | 3 | 1 | 0 | 1 | ......................| 2 | 9 |
----------------------------------------------------------------------------
Here's my code:
<?php
$query = $this->db->query("SELECT * FROM tblcourse where category = 'Soft' and inex = 'inhouse' ORDER by course_name ASC");
foreach ($query->result() as $row){
?>
<tr>
<td>Id</td>
<td><?php echo $row->course_name; ?></td> // Output the Course Name
<td class="center"><?php echo $row->days; ?></td> //Output the Training days
<?php
$course = $row->course_name;
$query_jan = $this->db->query("SELECT * FROM tbldata where course like '%$course%' and course_end < '2016-11-30' and course_end >= '2016-11-01'");
?>
<td><?php echo $query_jan->num_rows(); ?></td> // Output the corresponding number of course taken by the person for the month of january
<? php
} // end of foreach
?>
Here's the structure of my database:
Table 1: tblCourse
Fields: ID, Course_name, Category, Training_days
Table 2: tblData
Fields: ID, Trainees_name, Course_taken, Date_start, Date_end
I'm just starting to develop using php.
Can I query this in a single query?

Answer 1

Considering Course_taken as foreign key to table tblCourse.
select tblCourse.Course_name,
Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec,(Jan+Feb+Mar+Apr+May+Jun+Jul+Aug+Sep+Oct+Nov+Dec) as `Total`
from (
select
tblCourse.Course_name+
sum(CASE WHEN month(tblData.Date_start)=1 or month(tblData.Date_end)=1 THEN 1 else 0 end) as `Jan`,
sum(CASE WHEN month(tblData.Date_start)=2 or month(tblData.Date_end)=2 THEN 1 else 0 end) as `Feb`,
sum(CASE WHEN month(tblData.Date_start)=3 or month(tblData.Date_end)=3 THEN 1 else 0 end) as `Mar`,
sum(CASE WHEN month(tblData.Date_start)=4 or month(tblData.Date_end)=4 THEN 1 else 0 end) as `Apr`,
sum(CASE WHEN month(tblData.Date_start)=5 or month(tblData.Date_end)=5 THEN 1 else 0 end) as `May`,
sum(CASE WHEN month(tblData.Date_start)=6 or month(tblData.Date_end)=6 THEN 1 else 0 end) as `Jun`,
sum(CASE WHEN month(tblData.Date_start)=7 or month(tblData.Date_end)=7 THEN 1 else 0 end) as `Jul`,
sum(CASE WHEN month(tblData.Date_start)=8 or month(tblData.Date_end)=8 THEN 1 else 0 end) as `Aug`,
sum(CASE WHEN month(tblData.Date_start)=9 or month(tblData.Date_end)=9 THEN 1 else 0 end) as `Sep`,
sum(CASE WHEN month(tblData.Date_start)=10 or month(tblData.Date_end)=10 THEN 1 else 0 end) as `Oct`,
sum(CASE WHEN month(tblData.Date_start)=11 or month(tblData.Date_end)=11 THEN 1 else 0 end) as `Nov`,
sum(CASE WHEN month(tblData.Date_start)=12 or month(tblData.Date_end)=12 THEN 1 else 0 end) as `Dec`
from tblCourse
left join tblData on tblCourse.id=tblData.Course_taken
group by tblCourse.id
) data
Note : Make sure Date_start and Date_end should be of same year.

Answer 2

SELECT COUNT(Trainees_name) FROM tbldata where Course_taken like '%$course%' and Date_start < '2016-11-30' and Date_end >= '2016-11-01'"