books by subject
Beginner's Guide to Databases

Feature Engineering and Selection: A Practical Approach for Predictive Models

Access 2003 in Easy Steps

Sams Teach Yourself Microsoft Access 2000 in 10 Minutes (Sams Teach Yourself in 10 Minute Guides)

Principles of Transaction Processing

Troubleshooting Oracle Performance

Microsoft SQL Server 2014 Query Tuning & Optimization
