10 Questions
What type of join is formed when all rows in the first table are joined to all rows in the second table?
Full outer join
What type of join is formed when a join condition is omitted?
Cartesian product
What does the CROSS JOIN clause produce between two tables?
Cartesian product
When using full outer joins, how many rows would be included if there are 20 rows in the first table and 8 rows in the second table?
160 rows
Which type of join combines rows from both tables whether or not there is a match?
Full outer join
What data type will the returned values have if one query selects CHAR and the other query selects VARCHAR2?
VARCHAR2
In the context of the text, what is the purpose of using the UNION operator in SQL?
To merge results of two or more SELECT statements
What is the significance of the COLUMN a_dummy NOPRINT command in the provided SQL statement?
It does not display 'a_dummy' in the output
How many queries are compiled together when using SET Operators according to the text?
Two queries
Which of the following is NOT an operator used as a SET Operator according to the text?
JOIN
Test your knowledge of SQL JOIN clauses by answering questions about NATURAL JOIN and USING clause. Learn how to retrieve records and create joins in SQL queries.
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