In SQL, a full outer join is a join that returns all records from both tables, wheter there’s a match or not:.

So far as I know, you can't do a full outer join in MySQL, so just run it as the UNION of a LEFT JOIN and a RIGHT JOIN as. If there are rows in "Customers" that do not have matches in "Orders", or if there are rows in "Orders" that do not have matches in "Customers", those rows will be listed as well.

The FULL OUTER JOIN keyword return all records when there is a match in either left (table1) or right (table2) table records. --The query above works for special cases where a FULL OUTER JOIN operation would not produce any duplicate rows. But how? Execute the following query as an alternative to SQL Full Outer Join. It gives the output of SQL Full Outer Join. -- The query above depends on the UNION set operator to remove duplicate rows introduced by the query pattern. In the previous examples, we explored the SQL Left Outer Join, and the SQL Right Outer Join with different examples. Note: FULL OUTER JOIN can potentially return very large result-sets! unfortunately MySQL doesn’t support this kind of join, and it has to be emulated somehow. This MySQL tutorial explains how to use MySQL JOINS (inner and outer) with syntax, visual illustrations, and examples. MySQL JOINS are used to retrieve data from multiple tables.

The basic syntax of Left Join in MySQL is as shown below:-- SQL Server LEFT JOIN Syntax SELECT Table1.Column(s), Table2.Column(s) FROM Table1 LEFT JOIN Table2 ON Table1.Common_Column = Table2.Common_Column --OR We can Simply Write it as SELECT Table1. A MySQL JOIN is performed whenever two or more tables are joined in a SQL statement. This tutorial explains FULL OUTER JOIN and uses in Oracle. In SQL it happens often that the same result can be achieved in different ways, and which way is the most appropriate is just a matter of taste (or of perormances). This gives the desired results in … One method to simulate a full join is to take the union of two outer joins, for example, select * from apples as a left outer join oranges as o on a.price = o.price union select * from apples as a right outer join oranges as o on a.price = o.price. Note: The FULL OUTER JOIN keyword returns all the rows from the left table (Customers), and all the rows from the right table (Orders). SELECT column_name(s) FROM table1 FULL OUTER JOIN table2 ON table1.column_name = table2.column_name; MySQL Left Join Syntax. Oracle FULL OUTER JOIN: A full outer join is such a join that performs a join between two tables that returns the results of an INNER join as well as the results of a left and right outer join. We can do a Union of the result of both SQL Left Outer Join and SQL Right Outer Join. SELECT * FROM cajas LEFT JOIN almacenes ON almacenes.codigo = cajas.almacen UNION SELECT * FROM cajas RIGHT JOIN almacenes ON almacenes.codigo = cajas.almacen; I think this would fix your problem. FULL OUTER JOIN.