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Editorial Team
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Asked: 2026-05-15T03:34:14+00:00

I am currently working on a MySQL query that contains a table: TBL:lesson_fee -fee_type_id

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I am currently working on a MySQL query that contains a table:

TBL:lesson_fee
-fee_type_id (PRI)
-lesson_type_id (PRI)
-lesson_fee_amount

this table contains the fees for a particular ‘lesson type’ and there are different ‘fee names’ (fee_type). Which means that there can be many entries in this table for one ‘lesson type’

In my query I am joining this table onto the rest of the query via the ‘lesson_type’ table using:

lesson_fee 
INNER JOIN (other joins here)
ON lesson_fee.lesson_type_id = lesson_type.lesson_type_id

The problem with this is that it is currently returning duplicate data in the result. 1 row for every duplicate entry in the ‘lesson fee’ table.

I am also joining the ‘fee type’ table using this ‘fee_type_id’

Is there a way of telling MySQL to say “Join the lesson_fee table rows that have lesson_fee.lesson_type_id and fee_type_id = client.fee_type_id”.

UPDATE: Query:

SELECT
lesson_booking.lesson_booking_id,lesson_fee.lesson_fee_amount
FROM
fee_type INNER JOIN
        (lesson_fee INNER JOIN
                (color_code INNER JOIN
                                (employee INNER JOIN
                                        (horse_owned INNER JOIN
                                            (lesson_type INNER JOIN
                                                    (timetable INNER JOIN
                                                        (lesson_booking INNER JOIN CLIENT
                                                        ON
                                                        client.client_id = lesson_booking.client_id)
                                                    ON
                                                    lesson_booking.timetable_id = timetable.timetable_id)
                                            ON
                                            lesson_type.lesson_type_id = timetable.lesson_type_id)
                                        ON
                                        horse_owned.horse_owned_id = lesson_booking.horse_owned_id)
                                ON
                                employee.employee_id = timetable.employee_id)
                                ON
                                employee.color_code_id = color_code.color_code_id)
                ON
                lesson_fee.lesson_type_id = lesson_type.lesson_type_id)
        ON
        lesson_fee.fee_type_id = client.fee_type_id
WHERE booking_date = '2010-04-06'
ORDER BY lesson_booking_id ASC

Update: Output:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>query data</title>
<style type="text/css" <!--
.normal {  font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; font-weight: normal; color: #000000}
.medium {  font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 15px; font-weight: bold; color: #000000; text-decoration: none}
--></style>
</head>
<body>
<h3>query result</h3><table border=1>
<tr>
<td bgcolor=silver class='medium'>lesson_booking_id</td><td bgcolor=silver class='medium'>lesson_fee_amount</td></tr>
<tr>
<td class='normal' valign='top'>0</td>

<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>0</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>0</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>0</td>

<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>5</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>5</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>5</td>

<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>5</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>9</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>9</td>

<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>9</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>9</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>11</td>

<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>11</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>11</td>
<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>11</td>

<td class='normal' valign='top'>25.00</td>
</tr>
<tr>
<td class='normal' valign='top'>13</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>13</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>13</td>

<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>13</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>16</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>16</td>

<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>16</td>
<td class='normal' valign='top'>500.00</td>
</tr>
<tr>
<td class='normal' valign='top'>16</td>
<td class='normal' valign='top'>500.00</td>
</tr>
</table>
</body></html>
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1 Answer

  1. Editorial Team

    It’s almost what you write in english

    “Join the lesson_fee table rows that have lesson_fee.lesson_type_id and fee_type_id = client.fee_type_id”.

    FROM lesson_fee 
INNER JOIN client ON 
  lesson_fee.lesson_type_id=client_lesson_type_id AND  
  lesson_fee.fee_type_id=client.fee_type_id

    Assuming lesson_fee (lesson_type_id,fee_type_id) is unique, then this will return one row from the lesson_fee table,rather than one for each fee type.

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