A Table in RisingWave represents a collection of relational data with a defined schema, created using the `CREATE TABLE` SQL command. Unlike traditional databases, RisingWave tables can be defined directly on top of external data streams (often using `CREATE SOURCE` first, then `CREATE TABLE ... FROM SOURCE`) or serve as targets for data sinks. They function as foundational datasets within RisingWave that can be queried or joined with other streams and materialized views.