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A Guide to SQL NULL (and SQL NOT NULL)

Dec 23, 2019 · 12 min read · sql sql-functions ·
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In this article, you'll learn all about NULL, what it is, why it's different, how you can check for it in different databases, and many examples.

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Sample Database: University Rankings (ERD and SQL)

Dec 17, 2019 · 5 min read · database-design ·
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Details on the sample university database

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Sample Database: Superheroes (ERD and SQL)

Dec 15, 2019 · 5 min read ·
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Details on hte sample superheroes database.

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19 Best Database Books

Dec 12, 2019 · 11 min read · sql ·
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A list of the best database books.

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Sample Database: Olympic Games (ERD and SQL)

Dec 9, 2019 · 6 min read · database-design sql ·
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Details of the sample Olympics database.

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Sample Database: Video Games (ERD and SQL)

Dec 2, 2019 · 5 min read ·
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Details of the sample video games database.

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How to Resolve Oracle Connection Issues

Nov 15, 2019 · 9 min read · sql-errors ·
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Learn some tips for resolving Oracle connection issues.

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Sample Database: Movies (ERD and SQL)

Nov 3, 2019 · 6 min read ·
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Details of the sammple movies database.

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SQL Boolean Data Type

Aug 6, 2019 · 7 min read ·
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Do you need to store a boolean value in your SQL database? Does the data type even exist? Read this article and find out.

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SQL Temp Tables: The Ultimate Guide

Aug 5, 2019 · 10 min read · sql ·
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Have you ever heard of an SQL temp table or a temporary table? Wondering what it is? Learn all about them in this guide.

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