> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-1d264819.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Documentation for Quota

# CREATE QUOTA

Creates a [quota](/concepts/features/security/access-rights#quotas-management) that can be assigned to a user or a role.

Syntax:

```sql theme={null}
CREATE QUOTA [IF NOT EXISTS | OR REPLACE] name [ON CLUSTER cluster_name]
    [IN access_storage_type]
    [KEYED BY {user_name | ip_address | client_key | client_key,user_name | client_key,ip_address | normalized_query_hash} | NOT KEYED]
    [FOR [RANDOMIZED] INTERVAL number {second | minute | hour | day | week | month | quarter | year}
        {MAX { {queries | query_selects | query_inserts | errors | result_rows | result_bytes | read_rows | read_bytes | written_bytes | execution_time | failed_sequential_authentications | queries_per_normalized_hash} = number } [,...] |
         NO LIMITS | TRACKING ONLY} [,...]]
    [TO {role [,...] | ALL | ALL EXCEPT role [,...]}]
```

Keys `user_name`, `ip_address`, `client_key`, `client_key, user_name`, `client_key, ip_address`, and `normalized_query_hash` correspond to the fields in the [system.quotas](/reference/system-tables/quotas) table.

Parameters `queries`, `query_selects`, `query_inserts`, `errors`, `result_rows`, `result_bytes`, `read_rows`, `read_bytes`, `written_bytes`, `execution_time`, `failed_sequential_authentications`, `queries_per_normalized_hash` correspond to the fields in the [system.quotas\_usage](/reference/system-tables/quotas_usage) table.

`ON CLUSTER` clause allows creating quotas on a cluster, see [Distributed DDL](/reference/statements/distributed-ddl).

**Examples**

Limit the maximum number of queries for the current user with 123 queries in 15 months constraint:

```sql theme={null}
CREATE QUOTA qA FOR INTERVAL 15 month MAX queries = 123 TO CURRENT_USER;
```

For the default user limit the maximum execution time with half a second in 30 minutes, and limit the maximum number of queries with 321 and the maximum number of errors with 10 in 5 quarters:

```sql theme={null}
CREATE QUOTA qB FOR INTERVAL 30 minute MAX execution_time = 0.5, FOR INTERVAL 5 quarter MAX queries = 321, errors = 10 TO default;
```

Create a quota where each distinct normalized query pattern gets its own bucket, limited to 100 executions per hour:

```sql theme={null}
CREATE QUOTA qC KEYED BY normalized_query_hash FOR INTERVAL 1 hour MAX queries = 100 TO default;
```

Limit any single normalized query pattern to at most 50 executions per hour (regardless of the quota key type):

```sql theme={null}
CREATE QUOTA qD FOR INTERVAL 1 hour MAX queries_per_normalized_hash = 50 TO default;
```

Further examples, using the xml configuration (not supported in ClickHouse Cloud), can be found in the [Quotas guide](/concepts/features/configuration/server-config/quotas).

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