Tech-Evangelist has put together an excellent cheatsheet for MySQL. There’s lots of other MySQL cheatsheets out there, but this one is unique in the fact that it gives examples of usage rather than just snippets of code.
This cheatsheet also includes a summary of commonly used MySQL data types, which will be really helpful to me. I can’t tell you how many times in a week I hit the MySQL website looking for specs on a certain data type.
If you think this cheatsheet would be useful to you, head on over to Tech-Evangelist to download the PDF.