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13 lines
401 B
Markdown
13 lines
401 B
Markdown
---
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slug: /zh/sql-reference/statements/exists
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sidebar_position: 45
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sidebar_label: EXISTS
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---
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# EXISTS 语句 {#exists-statement}
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``` sql
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EXISTS [TEMPORARY] [TABLE|DICTIONARY] [db.]name [INTO OUTFILE filename] [FORMAT format]
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```
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返回一个单独的 `UInt8`类型的列,如果表或数据库不存在,则包含一个值 `0`,如果表在指定的数据库中存在,则包含一个值 `1`。 |