## 0.4. On MySQL and mSQL

We have attempted to provide balanced and full coverage of both MySQL and mSQL in this book. A single book on both engines makes sense since they are so similar. While they do not have common code, the similarities are quite intentional. In order to be consistent, we have chosen always to use the expression "MySQL and mSQL" or "MySQL or mSQL" wherever something is true of both database engines. MySQL comes first only because we arbitrarily decided to make the most popular of the two appear first. Where MySQL or mSQL appear alone in a sentence without the other, the sentence is specifically addressing an issue associated with that database engine. Except for chapters dedicated solely to one engine or the other, you can assume that MySQL or mSQL appearing alone in a sentence means that the sentence is true only of the database being mentioned.

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