This resource supplys a necessary theoretical and information footing for studying of database management system (DBMS) and program languages of information sistems.

All of the e-books and articles on this website are dedicated to Relational Database Management System (RDBMS) and Structured Query Language (SQL).

The basic directions are:
- database management system;
- DBMS administering and performance tuning;
- Structured Query Language (SQL);
- query optimization.

The choise of sources shows the website authors' interests, but you can offer interesting texts for publication (provided that the copyright reserving).