# system.functions {#system-functions} Contains information about normal and aggregate functions. Columns: - `name`(`String`) – The name of the function. - `is_aggregate`(`UInt8`) — Whether the function is aggregate. **Example** ```sql SELECT * FROM system.functions LIMIT 10; ``` ```text ┌─name──────────────────┬─is_aggregate─┬─case_insensitive─┬─alias_to─┬─create_query─┬─origin─┐ │ logTrace │ 0 │ 0 │ │ │ System │ │ aes_decrypt_mysql │ 0 │ 0 │ │ │ System │ │ aes_encrypt_mysql │ 0 │ 0 │ │ │ System │ │ decrypt │ 0 │ 0 │ │ │ System │ │ encrypt │ 0 │ 0 │ │ │ System │ │ toBool │ 0 │ 0 │ │ │ System │ │ windowID │ 0 │ 0 │ │ │ System │ │ hopStart │ 0 │ 0 │ │ │ System │ │ hop │ 0 │ 0 │ │ │ System │ │ snowflakeToDateTime64 │ 0 │ 0 │ │ │ System │ └───────────────────────┴──────────────┴──────────────────┴──────────┴──────────────┴────────┘ 10 rows in set. Elapsed: 0.002 sec. ``` [Original article](https://clickhouse.com/docs/en/operations/system-tables/functions)