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## Alter Table

You can use the alter table command to perform the following operations.

- Add schema fields to the table schema
- Remove schema fields from the table schema
- Modify the Time-To-Live value of the table

- Add a region
- Remove a region

Note:

You can specify only one type of operation in a single command. For example, you cannot remove a schema field and set the TTL value together.

- Using SQL command to alter table
- Using TableRequest API to alter table