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The SQL Workshop

You're reading from   The SQL Workshop Learn to create, manipulate and secure data and manage relational databases with SQL

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Product type Paperback
Published in Dec 2019
Publisher Packt
ISBN-13 9781838642358
Length 288 pages
Edition 1st Edition
Languages
Concepts
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Authors (3):
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Prashanth Jayaram Prashanth Jayaram
Author Profile Icon Prashanth Jayaram
Prashanth Jayaram
Frank Solomon Frank Solomon
Author Profile Icon Frank Solomon
Frank Solomon
Awni Al Saqqa Awni Al Saqqa
Author Profile Icon Awni Al Saqqa
Awni Al Saqqa
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Toc

Table of Contents (13) Chapters Close

Preface 1. SQL Basics FREE CHAPTER 2. Manipulating Data 3. Normalization 4. The SELECT Statement 5. Shaping Data with the WHERE Clause 6. JOINS 7. Subqueries, Cases, and Views 8. SQL Programming 9. Security 10. Aggregate Functions 11. Advanced SQL Appendix

CROSS JOIN

This type of join is used when you want to combine the elements of a particular column with the elements of another column. This implies that each record from the first table and each record from the second table are laid out in all possible combinations in one single table, just like in the case of a cartesian product. Here is how we can perform this task using the CROSS JOIN syntax:

SELECT [Column List]
  FROM [Table 1] CROSS JOIN [Table 2] 
WHERE [Condition]

To understand this concept well, we will perform CROSS JOIN on simple tables and see how they work in the following exercise.

Exercise 6.04: Implementing CROSS JOINS

Consider that we have a table called Facecards, with a column called suits, and a table called CardSuite with a column called cardvalue. Now, we want to cross-reference all the suits with all the card values. To do this, perform the following steps:

  1. Create a table called Facecards with the following values:
    Create table Facecards...
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