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Merge pull request #34151 from cnmade/PF202201301444

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Translate zh/sql-reference/statements/truncate
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---
toc_priority: 52
toc_title: TRUNCATE
---
# TRUNCATE 语句 {#truncate-statement}
``` sql
TRUNCATE TABLE [IF EXISTS] [db.]name [ON CLUSTER cluster]
```
删除表中的所有数据。当省略子句 `IF EXISTS` 时，如果表不存在，则查询返回一个错误。
`TRUNCATE` 查询不支持[View](../../engines/table-engines/special/view.md),[File](../../engines/table-engines/special/file.md), [URL](../../engines/table-engines/special/url.md), [Buffer](../../engines/table-engines/special/buffer.md) 和 [Null](../../engines/table-engines/special/null.md)表引擎。
可以使用[replication_alter_partitions_sync](../../operations/settings/settings.md#replication-alter-partitions-sync)设置在复制集上等待执行的操作。
通过 [replication_wait_for_inactive_replica_timeout](../../operations/settings/settings.md#replication-wait-for-inactive-replica-timeout) 设置，可以指定不活动副本执行 `TRUNCATE`查询需要等待多长时间(以秒为单位)。
!!! info "注意"
如果`replication_alter_partitions_sync` 被设置为`2`，并且某些复制集超过 `replication_wait_for_inactive_replica_timeout`设置的时间不激活，那么将抛出一个异常`UNFINISHED`。