Revert "Update setting.md"

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---
toc_priority: 38
toc_title: SETTING
---
# 表设置操作 {#table_settings_manipulations}
这是一组更改表设置的操作。你可以修改设置或将其重置为默认值。单个查询可以同时更改多个设置。 如果指定名称的设置不存在,则查询会引发异常。
**语法**
``` sql
ALTER TABLE [db].name [ON CLUSTER cluster] MODIFY|RESET SETTING ...
```
!!! note "注意"
这些查询只能应用于 [MergeTree](../../../engines/table-engines/mergetree-family/mergetree.md) 表。
## 修改设置 {#alter_modify_setting}
更改表设置
**语法**
```sql
MODIFY SETTING setting_name=value [, ...]
```
**示例**
```sql
CREATE TABLE example_table (id UInt32, data String) ENGINE=MergeTree() ORDER BY id;
ALTER TABLE example_table MODIFY SETTING max_part_loading_threads=8, max_parts_in_total=50000;
```
## 重置设置 {#alter_reset_setting}
重置表设置为默认值。如果设置处于默认状态,则不采取任何操作。
**语法**
```sql
RESET SETTING setting_name [, ...]
```
**示例**
```sql
CREATE TABLE example_table (id UInt32, data String) ENGINE=MergeTree() ORDER BY id
SETTINGS max_part_loading_threads=8;
ALTER TABLE example_table RESET SETTING max_part_loading_threads;
```
**参见**
- [MergeTree settings](../../../operations/settings/merge-tree-settings.md)
../../../../en/sql-reference/statements/alter/setting.md