Final answer:
The option that represents a non-equality join is FULL JOIN.
The correct answer is: c) FULL JOIN
Step-by-step explanation:
A non-equality join, also known as an equijoin, inner join, or simple join, is different from a full join. Let's briefly explain each of the given options:
- a) LEFT JOIN: A left join returns all the records from the left table (the table mentioned before the "LEFT JOIN" clause in the SQL statement) and the matching records from the right table (the table mentioned after the "LEFT JOIN" clause). If there is no match, the result will contain NULL values for the columns from the right table.
- b) RIGHT JOIN: A right join is the opposite of a left join. It returns all the records from the right table and the matching records from the left table. If there is no match, the result will contain NULL values for the columns from the left table.
- c) FULL JOIN: A full join returns all the records when there is a match in either the left or the right table. If there is no match, NULL values are included for the columns from the non-matching table. In other words, it combines the results of both the left and right joins.
- d) CROSS JOIN: A cross join, also known as a Cartesian join, returns the combination of each row from the first table with every row from the second table. It does not consider any matching conditions and simply returns all possible combinations.
Therefore, the option that represents a non-equality join is c) FULL JOIN.
Your question is incomplete, but most probably the full question was:
A(n) non-equality join is also known as an equijoin, inner join, or simple join. Which option represents a non-equality join?
a) LEFT JOIN
b) RIGHT JOIN
c) FULL JOIN
d) CROSS JOIN