Database building ER Diagram Data Dictionary Horizontal and Vertical Partitioning Database Administrating Database Structure Designing Working on AWS-RDS, S3, Azurecloud, Oracle Cloud, Express etc. Core Database Server : MySQL , MariaDB, NoSQL, Cassendra, PostgreSQL.SQLite,Oracle AS, Fusion DB,MSSQL Server etc. Performance Tuning Load / Thread Pooling Connection Mechanism Security / Vulnerability Management Table Caching, Session Partitioning ( Horizontal / Vertical ) Explain Plan