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The SQL Workshop

You're reading from  The SQL Workshop

Product type Book
Published in Dec 2019
Publisher Packt
ISBN-13 9781838642358
Pages 288 pages
Edition 1st Edition
Languages
Concepts
Authors (3):
Frank Solomon Frank Solomon
Profile icon Frank Solomon
Prashanth Jayaram Prashanth Jayaram
Profile icon Prashanth Jayaram
Awni Al Saqqa Awni Al Saqqa
Profile icon Awni Al Saqqa
View More author details

Table of Contents (13) Chapters

Preface 1. SQL Basics 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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