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

> EXISTS 语句的文档

# EXISTS 语句

```sql theme={null}
EXISTS [TEMPORARY] [TABLE|DICTIONARY|DATABASE] [db.]name [INTO OUTFILE filename] [FORMAT format]
```

返回一个 `UInt8` 类型的单列：如果表或数据库不存在，该列包含单个值 `0`；如果表存在于指定的数据库中，则包含 `1`。