Neat ClickHouse features more people need to know about

ClickHouse is a powerful open-source columnar database management system known for its high performance and compression ratio. In addition to these core features, it also offers several hidden gems that can enhance day-to-day work. Some of the lesser-known yet useful features include SELECT modifiers for querying multiple columns, manual test data input in various formats, generating date or time sequences using the numbers() table-function, formatting data with custom columns, and querying an entire cluster using the clusterAllReplicas function. Additionally, ClickHouse provides functions to initialize and finalize aggregation states when working with AggregateFunctions. These features can help users optimize their workflows and make better use of ClickHouse's capabilities.