Draft.

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

@@ -122,6 +122,9 @@ Example:
 ALTER TABLE visits MODIFY COLUMN browser Array(String)
 ```
 
+## ALTER TABLE MODIFY COLUMN col_name REMOVE what_to_remove
+Здесь будет описание для задачи 3122. 
+
 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.
 
 There are several processing stages:

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

@@ -10,3 +10,28 @@ You can change [table TTL](../../../engines/table-engines/mergetree-family/merge
 ``` 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](#)