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Questions and Answers
Which of the following best describes a join clause in SQL?
Which of the following best describes a join clause in SQL?
- A clause that filters rows from a table based on a condition
- A clause that creates a new table from columns of one or more tables (correct)
- A clause that renames columns in a table
- A clause that sorts columns in a table in ascending or descending order
What is the result of a CROSS JOIN in SQL?
What is the result of a CROSS JOIN in SQL?
- A sorted table based on a column
- A filtered table based on a condition
- The Cartesian product of rows from tables in the join (correct)
- A table with renamed columns
What is the difference between an inner join and a cross join in SQL?
What is the difference between an inner join and a cross join in SQL?
- An inner join returns only matching rows, while a cross join returns all possible combinations of rows (correct)
- An inner join combines columns from one or more tables into a new table, while a cross join filters rows based on a condition
- An inner join returns all possible combinations of rows, while a cross join returns only matching rows
- An inner join filters rows based on a condition, while a cross join combines columns from one or more tables into a new table
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