eBook SQL and Relational Theory: How to Write Accurate SQL Code written by C. J. Date of O’Reilly Media, Incorporated is available for free download from Rapidshare, Hotfile, FileSonic, FileShare, Depositfiles. SQL is full of difficulties and traps for the unwary. You can avoid them if you understand relational theory, but only if you know how to put the theory into practice. In this insightful... 

eBook MongoDB in Action written by Kyle Banker of Manning Publications Company is available for free download from Rapidshare, Hotfile, FileSonic, FileShare, Depositfiles. SummaryMongoDB in Action is a comprehensive guide to MongoDB for application developers. The book begins by explaining what makes MongoDB unique and describing its ideal use cases. A series of tutorials designed for MongoDB...