Question

I created this select query to get some rows… Its working. but my problem is I need to remove duplicate rows from the query…

this is my query:

SELECT tcs.tutor_id, tcs.category_id, tcs.subject_id, s.subjects, t.tutor_name, t.tutor_code
FROM tutor_category_subject as tcs
INNER JOIN subject AS s ON tcs.subject_id = s.subject_id
INNER JOIN tutors AS t ON tcs.tutor_id = t.tutor_id
WHERE s.subjects LIKE '%business%';

This is its output:

    +----------+-------------+------------+------------------+-------------------+-----------+ 

| tutor_id | category_id | subject_id | subjects         | tutor_name        | tutor_code|

+----------+-------------+------------+------------------+-------------------+-----------+

|        1 |           6 |         37 | Business Studies | Tharanga Nuwan    |      1250 |
|        3 |           6 |         37 | Business Studies | Kumara            |      1252 | 
|       15 |           4 |         11 | Business & Accou | Tharanga Nuwan    |      1264 | 
|       15 |           6 |         37 | Business Studies | Tharanga Nuwan    |      1264 |
|       16 |           5 |         11 | Business & Accou | Kasun Kalhara     |      1265 | 
|       16 |           6 |         37 | Business Studies | Kasun Kalhara     |      1265 |

Here, you can see tutor id has duplicated in my query. and I need to select all subjects to a tutor in one row separated by comma.

eg: (Business & Accounting Studies, Business Studies) like this..

So can anybody tell me what I need to do in my select query??

Thank you.

This is my expecting result

+----------+-------------+------------+-------------------------------------------------+-----------------------+------------+
| tutor_id | category_id | subject_id | subjects                                        | tutor_name            | tutor_code |
+----------+-------------+------------+-------------------------------------------------+-----------------------+------------+
|       16 |           5 |         11 | Business & Accounting Studies, Business Studies | Kasun Kalhara         |       1265 |
|        3 |           6 |         37 | Business Studies                                | Kumara                |       1252 |
|        1 |           6 |         37 | Business Studies, Business & Accounting Studies | Tharanga Nuwan Kumara |       1250 |
+----------+-------------+------------+-------------------------------------------------+-----------------------+------------+

Answer 1

SELECT tcs.tutor_id, tcs.category_id, tcs.subject_id, GROUP_CONCAT(s.subjects) AS subjects,  t.tutor_name, t.tutor_code
FROM tutor_category_subject as tcs
INNER JOIN subject AS s ON tcs.subject_id = s.subject_id
INNER JOIN tutors AS t ON tcs.tutor_id = t.tutor_id
WHERE s.subjects LIKE '%business%'
GROUP BY t.tutor_name;