mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-03 21:12:28 +00:00
30 lines
996 B
Markdown
30 lines
996 B
Markdown
---
|
||
toc_priority: 35
|
||
toc_title: DATABASE
|
||
---
|
||
|
||
# CREATE DATABASE {#query-language-create-database}
|
||
|
||
Creates a new database.
|
||
|
||
``` sql
|
||
CREATE DATABASE [IF NOT EXISTS] db_name [ON CLUSTER cluster] [ENGINE = engine(...)]
|
||
```
|
||
|
||
## Clauses {#clauses}
|
||
|
||
### IF NOT EXISTS {#if-not-exists}
|
||
|
||
If the `db_name` database already exists, then ClickHouse does not create a new database and:
|
||
|
||
- Doesn’t throw an exception if clause is specified.
|
||
- Throws an exception if clause isn’t specified.
|
||
|
||
### ON CLUSTER {#on-cluster}
|
||
|
||
ClickHouse creates the `db_name` database on all the servers of a specified cluster. More details in a [Distributed DDL](../../../sql-reference/distributed-ddl.md) article.
|
||
|
||
### ENGINE {#engine}
|
||
|
||
[MySQL](../../../engines/database-engines/mysql.md) allows you to retrieve data from the remote MySQL server. By default, ClickHouse uses its own [database engine](../../../engines/database-engines/index.md). There’s also a [lazy](../../../engines/database-engines/lazy.md) engine.
|