Difference between FULL JOIN & INNER JOIN

Question

What is the difference between a FULL JOIN and an INNER JOIN?

When I do a FULL JOIN, I get 832 records and with an INNER

Answer 1

Consider Table A and Table B

Table A - (Key, Name)

1, Data1 2, Data2 4, Data4 5, Data5

Table B - (Key, FKey, Name)

1, 1, DataA 2, 2, DataB 3, NULL, DataC 4, 4, DataD

An inner join would return

• 1, Data1, 1, 1, DataA
• 2, Data2, 2, 2, DataB
• 4, Data3, 4, 4, DataD

whilst a full outer join would return

• 1, Data1, 1, 1, DataA
• 2, Data2, 2, 2, DataB
• NULL, NULL, 3, NULL, DataC
• 4, Data4, 4, 4, DataD
• 5, Data5, NULL, NULL, NULL