SQLspecialists👨🏻‍💻💾 ∟💾 Database design and normalization ∟💾 SQL basics (SELECT, INSERT, UPDATE, DELETE) ∟💾 Joins (INNER, LEFT, RIGHT, FULL) ∟💾 Aggregate functions (COUNT, SUM, AVG, MAX, MIN) ∟💾 Subqueries and nested queries ∟💾 Constraints (PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK) ∟💾 Indexes and performance tuning ∟💾 Views and materialized views ∟💾 Stored procedures and functions ∟💾 Triggers and events ∟💾 Transactions and ACID properties ∟💾 Data types and schema design ∟💾 User roles and permissions ∟💾 SQL optimization techniques ∟💾 Backup and restore strategies ∟💾 Data migration (ETL processes) ∟💾 NoSQL vs SQL databases ∟💾 Database replication and clustering ∟💾 Version control (Git for database scripts)