SQLZOO vs XCache
A side-by-side look at SQLZOO and XCache. For an in-depth review of either product, follow the links below.
SQLZOO
Education & Reference
SQLZOO is a free online resource that helps users learn SQL concepts through interactive tutorials and exercises. It covers SQL syntax for a variety of database management systems.
sqldatabasetutorialsexercises
XCache
Development
XCache is a free open source PHP opcode cache. It stores precompiled PHP bytecode in shared memory, improving PHP performance by removing the need to load and parse scripts on each request. It's easy to install and configure in PHP.
cachingperformanceopcodephp