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POHow to link 4 tables using an mySQL query
 

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  1. POHow to link 4 tables using an mySQL query
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    <p>Vehicle</p> <pre><code>+--------------------+--------------+------+-----+---------+ | Field | Type | Null | Key | Default | +--------------------+--------------+------+-----+---------+ | id | int(11) | NO | Pk | NULL | | model | varchar(35) | NO | | NULL | +--------------------+--------------+------+-----+---------+ </code></pre> <p>info</p> <pre><code>+--------------------+--------------+------+-----+---------+ | Field | Type | Null | Key | Default | +--------------------+--------------+------+-----+---------+ | id | int(11) | NO | Pk | NULL | | vehicle_id | varchar(35) | NO | FK | NULL | | location | varchar(35) | NO | | NULL | +--------------------+--------------+------+-----+---------+ </code></pre> <p>Axle 1</p> <pre><code>+--------------------+--------------+------+-----+---------+ | Field | Type | Null | Key | Default | +--------------------+--------------+------+-----+---------+ | id | int(11) | NO | Pk | NULL | | vehicle_id | varchar(35) | NO | FK | NULL | | weight | varchar(35) | NO | | NULL | +--------------------+--------------+------+-----+---------+ </code></pre> <p>Axle 2</p> <pre><code>+--------------------+--------------+------+-----+---------+ | Field | Type | Null | Key | Default | +--------------------+--------------+------+-----+---------+ | id | int(11) | NO | Pk | NULL | | vehicle_id | varchar(35) | NO | FK | NULL | | weight | varchar(35) | NO | | NULL | +--------------------+--------------+------+-----+---------+ </code></pre> <p>I wish to create a query that will return all the fields from all tables with a common vehicle_id. The vehicle_id being a reference in each of the 3 tables (info, axle1, axle 2) to the primary key in the Vehicle table. Could someone please explain how I might go about doing so? I tried using multiple joins but it didnt work!Many thanks.</p> <p>EDIT: </p> <p>Query I tried was;</p> <pre><code>SELECT * FROM Vehicle JOIN info, axle1, axle 2 ON vehicle.id = axle1.vehicle_id AND vehicle.id = axle2.vehicle_id AND vehicle.id = info.vehicle_id </code></pre>
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    1. USMahmoud Gamal
    1. USJnanathan
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    2. VO
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    1. COPaste the query you tried in the question body.
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      1. USNapolux
    2. COCould you paste the code that wrote so we have something to start with?
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      1. USNiklas
    3. COsure, I have edited the original to include my original statement
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      1. USJnanathan
 

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