snowflake , Soap, Json, Dimensional Modeling, Sql, Star Schema, Azure Synapse, REST, Xml, Databricks, Cosmos DB, Oracle, Nosql, denormalization principles, Cloud platforms, Designing models for ETL and analytics workflows, API Design and Ingestion, Data modeling tools such as ERwin, 3NF, Domain based Modeling, Relational Databases, Normalization, performance tuning techniques