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in SQL by (6.1k points)

I can presently query the join of two tables on the equality of a foreign/primary key in the below way:

 $result = mysql_query("SELECT * FROM `table1` 
                         INNER JOIN 
                       `table2` ON table1.primaryKey=table2.table1Id");

I want to extend this to multiple tables (all with the same foreign keys). I am attempting the following code which isn't returning anything. Can anyone help me with this?

1 Answer

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by (12.7k points)

You can use the below code:

SELECT * 
FROM table1 
INNER JOIN table2
      ON table1.primaryKey=table2.table1Id
INNER JOIN table3
      ON table1.primaryKey=table3.table1Id

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If you want to know more about Inner Join, refer to the below SQL Inner Join tutorial video that will help you out in a better way:

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