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SQL: Cross Joins

Instructions:

Choose an answer and hit 'next'. You will receive your score and answers at the end.

question 1 of 3

Which SQL statement will correctly perform a cross join on the tables tblAccount and tblBalance?

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1. A CROSS JOIN is performed on two tables. Table A has 15 rows; Table B has 5. How many rows will the SQL query return?

2. How is the Cartesian product of A and B represented?

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About This Quiz & Worksheet

Every once in a while you may be asked to cross join data sets. When this happens, you may be happy to know that this can be done in SQL. Use this assessment to test your understanding of what CROSS JOIN is in SQL and how this relates to Cartesian products.

Quiz & Worksheet Goals

The objective of this assessment is to help you determine how well you understand:

  • SQL statements that will perform a CROSS JOIN of tables
  • What happens when you cross join tables
  • Representations of Cartesian products in SQL
  • What a CROSS JOIN is

Skills Practiced

Skills you will exercise when you complete this assessment include:

  • Interpreting information - verify that you can read information regarding Cartesian products in SQL and interpret it correctly
  • Information recall - access the knowledge you've gained regarding how to conduct a CROSS JOIN
  • Knowledge application - use your knowledge to answer questions about how Cartesian products are represented in SQL

Additional Learning

Learn more about how Cartesian products work in SQL by studying the lesson SQL: Cross Joins. This brief lesson will help study the material of the assessment and:

  • The math behind Cartesian products
  • Examples of Cartesian products in SQL
  • The use of Cartesian products to cross join data
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