example1

docs/en/sql-reference/statements/alter/column.md

@@ -124,19 +124,19 @@ ALTER TABLE visits MODIFY COLUMN browser Array(String)
 
 ## MODIFY REMOVE
 
-Removes something from a column. For example, ______
+Removes something from a column. For example, TTL-property.
 
 Syntax:
 
 ```sql
-ALTER TABLE table_name MODIFY column_name REMOVE removing_part
+ALTER TABLE table_name MODIFY column_name REMOVE property
 ```
 
 **Example**
 
 Request
 ```sql
-ALTER TABLE table_name MOFIY COLUMN column_name REMOVE removing_part
+ALTER TABLE table_name MODIFY column_name REMOVE removing_property
 ```
 
 Result
@@ -148,6 +148,7 @@ Result
 
 - [ALTER](../../sql-reference/statements/alter/#query_language_queries_alter).
 - [MODIFY column](../../sql-reference/statements/alter/column/#alter_modify-column).
+- [REMOVE TTL](ttl.md).
 
 Changing the column type is the only complex action – it changes the contents of files with data. For large tables, this may take a long time.
 

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

@@ -25,22 +25,32 @@ ALTER TABLE table_name MODIFY column_name REMOVE TTL
 
 **Example**
 
-<!--Попробовать: 
-посмотреть установленные TTL, 
-показать состояние таблицы до, 
-удалить TTL 
-и показать состояние после.-->
+Requests and results:
 
-Request
+To start the background cleaning using TTL, make this:
 
 ```sql
-ALTER TABLE r_no_prop_table MODIFY COLUMN some_column REMOVE TTL;
+OPTIMIZE TABLE table_with_ttl FINAL;
+SELECT * FROM table_with_ttl;
 ```
-
-Result
+As a result you see that the second line was deleted.
 
 ```text
+2020-12-11 12:44:57    1       username1
+```
 
+```sql
+ALTER TABLE table_with_ttl REMOVE TTL;
+INSERT INTO table_with_ttl VALUES (now() - INTERVAL 4 MONTH, 2, 'username2');
+OPTIMIZE TABLE table_with_ttl FINAL;
+SELECT * FROM table_with_ttl;
+```
+
+And now we have nothing to delete.
+
+```text
+--2020-12-11 12:44:57    1       username1
+--2020-08-11 12:44:57    2       username2
 ```
 
 ### See Also