SQL FULL OUTER JOIN Keyword
The FULL OUTER JOIN keyword return all records when there is a match in left (table1) or right (table2) table records.
Note: FULL OUTER JOIN can potentially return very large result-sets!
Tip: FULL OUTER JOIN and FULL JOIN are the same.
FULL OUTER JOIN Syntax
SELECT column_name(s)
FROM table1
FULL OUTER JOIN table2
ON table1.column_name = table2.column_name
WHERE condition;