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    <p>I'm glad you asked about Unit Testing, and not testing in general.</p> <p>Databases have many features that need to be tested. Some examples:</p> <ul> <li>Data Types/Size/Character sets (try inserting a swedish name, or long urls or numbers from the real worlds, and see if your column definitions are ok)</li> <li>Triggers</li> <li>Contraints (foreign keys, uniqueness...)</li> <li>Views (check that data is correctly included/excluded/transformed)</li> <li>Stored Procedures</li> <li>UDFs</li> <li>Permissions</li> <li>...</li> </ul> <p>This is useful not only when you change something in your database, but also when you upgrade your dbms, or change something in your settings.</p> <p>Generally, Integration Testing is done. This means that a Test Suite in a programming language like PHP or Java is created, and the tests issue some queries. But if something fails, or there are some exceptions, it's harder to understand the problem, for 2 reasons:</p> <ul> <li>The problem could be in your PHP code, or in PHP configuration, or in the network, or...</li> <li>The SQL statements are harder to read and modify, if they are embedded in another programming language.</li> </ul> <p>So, in my opinion, for complex databases you need to use a Unit Testing framework which is written in SQL (using stored procedures and tables). You have to choose it carefully, because that kind of tools is not widely used (and thus not widely tested). For example, if you use MySQL I know these tools:</p> <ul> <li>STK/Unit <a href="http://stk.wikidot.com/stk-unit" rel="nofollow">http://stk.wikidot.com/stk-unit</a></li> <li>utMySQL <a href="http://utmysql.sourceforge.net/" rel="nofollow">http://utmysql.sourceforge.net/</a></li> </ul>
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    1. POHow to do database unit testing?
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    1. USFederico Razzoli
    1. USFederico Razzoli
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    1. COI don't understand. Why the negative rating?
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      1. USPedro Henrique A. Oliveira
    2. COPedro, since he/she didn't comment, I assume it's just because MySQL stored procedures are not popular. While I agree that they can be tricky for a beginner, they are used to implement complex, stable, fast tools, or parts of those tools. Just 2 examples: Shard-Query and Flexviews.
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      1. USFederico Razzoli
 

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