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30 lines
946 B
Markdown
30 lines
946 B
Markdown
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---
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toc_priority: 35
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toc_title: DATABASE
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---
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# CREATE DATABASE {#query-language-create-database}
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创建数据库.
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``` sql
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CREATE DATABASE [IF NOT EXISTS] db_name [ON CLUSTER cluster] [ENGINE = engine(...)]
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```
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## 条件 {#clauses}
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### IF NOT EXISTS {#if-not-exists}
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如果`db_name`数据库已经存在，则ClickHouse不会创建新数据库并且：
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- 如果指定了子句，则不会引发异常。
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- 如果未指定子句，则抛出异常。
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### ON CLUSTER {#on-cluster}
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ClickHouse在指定集群的所有服务器上创建`db_name`数据库。 更多细节在 [Distributed DDL](../../../sql-reference/distributed-ddl.md) article.
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### ENGINE {#engine}
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[MySQL](../../../engines/database-engines/mysql.md) 允许您从远程MySQL服务器检索数据. 默认情况下，ClickHouse使用自己的[database engine](../../../engines/database-engines/index.md). 还有一个[lazy](../../../engines/database-engines/lazy.md)引擎.
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