2022-08-28 13:53:52 +00:00
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---
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2022-08-28 13:58:27 +00:00
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slug: /en/operations/system-tables/functions
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2022-08-28 13:53:52 +00:00
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---
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2022-06-02 10:55:18 +00:00
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# functions
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2020-06-18 08:24:31 +00:00
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Contains information about normal and aggregate functions.
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Columns:
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- `name`(`String`) – The name of the function.
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- `is_aggregate`(`UInt8`) — Whether the function is aggregate.
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2020-08-06 08:50:29 +00:00
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2020-12-03 19:27:55 +00:00
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**Example**
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```sql
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SELECT * FROM system.functions LIMIT 10;
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```
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```text
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2022-03-12 06:24:31 +00:00
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┌─name──────────────────┬─is_aggregate─┬─case_insensitive─┬─alias_to─┬─create_query─┬─origin─┐
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│ logTrace │ 0 │ 0 │ │ │ System │
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│ aes_decrypt_mysql │ 0 │ 0 │ │ │ System │
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│ aes_encrypt_mysql │ 0 │ 0 │ │ │ System │
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│ decrypt │ 0 │ 0 │ │ │ System │
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│ encrypt │ 0 │ 0 │ │ │ System │
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│ toBool │ 0 │ 0 │ │ │ System │
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│ windowID │ 0 │ 0 │ │ │ System │
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│ hopStart │ 0 │ 0 │ │ │ System │
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│ hop │ 0 │ 0 │ │ │ System │
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│ snowflakeToDateTime64 │ 0 │ 0 │ │ │ System │
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└───────────────────────┴──────────────┴──────────────────┴──────────┴──────────────┴────────┘
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2020-12-03 19:27:55 +00:00
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2021-07-29 15:20:55 +00:00
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10 rows in set. Elapsed: 0.002 sec.
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2021-06-24 12:47:02 +00:00
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```
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2021-09-19 20:05:54 +00:00
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[Original article](https://clickhouse.com/docs/en/operations/system-tables/functions) <!--hide-->
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