ClickHouse/docs/en/sql-reference/statements/alter/ttl.md

---
toc_priority: 44
toc_title: TTL
---

### Manipulations with Table TTL {#manipulations-with-table-ttl}

You can change [table TTL](../../../engines/table-engines/mergetree-family/mergetree.md#mergetree-table-ttl) with a request of the following form:

``` sql
ALTER TABLE table-name MODIFY TTL ttl-expression
```

# ALTER TABLE REMOVE TTL

Brief description of what the statement does.

Syntax:

```sql
Syntax of the statement.
```

## Other necessary sections of the description (Optional)

Examples of descriptions with a complicated structure:

- https://clickhouse.tech/docs/en/sql-reference/statements/grant/
- https://clickhouse.tech/docs/en/sql-reference/statements/revoke/
- https://clickhouse.tech/docs/en/sql-reference/statements/select/join/


## See Also (Optional)

Links to related topics as a list.

-   [link](#)