Database Sharding Manager Overview Implement and manage horizontal database sharding strategies across PostgreSQL, MySQL, and MongoDB. This skill covers shard key selection, data distribution analysis, cross-shard query routing, and rebalancing operations for databases that have outgrown single-node capacity. Prerequisites - Database admin credentials with CREATE DATABASE, CREATE TABLE, and replication permissions - , , or CLI tools installed and configured - Network connectivity between all shard nodes - Current table sizes and growth rate data (query or ) - Application query patterns docume…