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How would I preform two inner joins in one query?
Ie: three tables
Invoice
Address
Client
Invoice has a column which references an id in clients. It also has a column which references an address. I need to get both the clients name from the matched table and the address from the matched table. How would I INNER JOIN both tables?
I'll add a few details...
invoice has rows address(references address id), client(references client id), id and notes client has rows first_name, last_name address has rows street_name and city
I need to pull up
721
You can have as many JOIN clauses as you need in the query. Each has an ON clause where you specify the related columns between the joined tables.
In this case the two tables are joined using the relationship table1.id = table2.id . It is possible to use multiple join statements together to join more than one table at the same time. To do that you add a second INNER JOIN statement and a second ON statement to indicate the third table and the second relationship.
$result = mysql_query("SELECT * FROM `table1` INNER JOIN `table2` ON table1. primaryKey=table2. table1Id"); I'd like to extend this to multiple tables (all with the same foreign keys).
Ans: Joining two tables in SQL can be done in four major ways: Inner Join (returns rows with matching columns), Left Join (ALL records in the left table and matching records in the right table), Right Join (ALL records in the right table and matching records in the left table), and Union (removes duplicates).
You can have as many JOIN clauses as you need in the query. Each has an ON clause where you specify the related columns between the joined tables.
SELECT columns FROM invoice INNER JOIN address ON join_condition INNER JOIN client ON join_condition Something like:
SELECT c.*, i.*, a.* FROM invoices i INNER JOIN client c ON i.clientid = c.clientid INNER JOIN address a ON a.clientid = c.clientid WHERE i.id = 21 Don't forget you only select the fields you require, not * (all).
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