Full Outer Join
This joins preserves both tables and retains all records but where there are matches it links them up
| Table | One | 
|---|---|
| 1 | A | 
| 2 | B | 
| 3 | C | 
| 4 | D | 
| Table | Two | 
|---|---|
| 1 | C | 
| 2 | D | 
| 3 | NULL | 
| 4 | NULL | 
| 5 | E | 
| 6 | F | 
| Result | Table One | Table Two | 
|---|---|---|
| 1 | A | C | 
| 2 | B | D | 
| 3 | C | NULL | 
| 4 | D | NULL | 
| 5 | NULL | E | 
| 6 | NULL | F | 
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