Andrey VolkovAndrey Volkov studied information systems in banking, and started his career as a financial analyst in a commercial bank. Using databases as a main tool in his work, he realized that querying the database directly and mastering SQL is much more efficient for ad hoc analysis than using any visual reporting software. He joined the data warehouse team, and after some time, he lead the team by taking the position of the data warehouse architect. He has worked mainly with Oracle and used to develop logical and physical models of financial and accounting data, implement them in the database, develop ETL processes, and perform analytical tasks. Andrey now works as a senior database developer in a telecommunications company. Here, he works mainly with PostgreSQL databases, being responsible for data modeling and implementing physical data structures, developing stored procedures, integrating databases with other software components, and developing a data warehouse. Read More Read Less