Question

A full outer join includes rows that satisfy the join condition, plus?

1) none of the above are true
2) rows in the right table that don't satisfy the join condition
3) rows in the left table that don't satisfy the join condition
4) all of the above are true

Answer 1

A full outer join includes rows that satisfy the join condition, plus rows in the right table that don't satisfy the join condition and rows in the left table that don't satisfy the join condition.

Step-by-step explanation:

A full outer join includes rows that satisfy the join condition, plus rows in the right table that don't satisfy the join condition and rows in the left table that don't satisfy the join condition.

For example, let's say we have two tables: Table A with columns ID and Name, and Table B with columns ID and City. When we perform a full outer join between Table A and Table B on the ID column, the result will include all rows from both tables, regardless of whether the ID values match or not.

A full outer join in database terminology refers to a type of join that not only includes rows that satisfy the join condition but also includes all remaining rows from both tables being joined. In other words, it includes:

1. Rows in the left table that do satisfy the join condition.
2. Rows in the right table that do satisfy the join condition.
3. Rows in the left table that don't satisfy the join condition.
4. Rows in the right table that don't satisfy the join condition.

Therefore, the correct answer to the question would be: 4) all of the above are true.