Update of english version of descriprion of the table function file.

docs/en/query_language/table_functions/file.md

@@ -2,17 +2,48 @@
 
 # file
 
-`file(path, format, structure)` - returns a table created from a path file with a format type, with columns specified in structure.
+Creates a table from a file.
 
-path - a relative path to a file from [user_files_path](../../operations/server_settings/settings.md#user_files_path).
+```
+file(path, format, structure)
+```
 
-format - file [format](../../interfaces/formats.md#formats).
+**Input parameters**
 
-structure -  table structure in 'UserID UInt64, URL String' format. Determines column names and types.
+- `path` — The relative path to the file from [user_files_path](../../operations/server_settings/settings.md#user_files_path).
+- `format` —  The [format](../../interfaces/formats.md#formats) of the file.
+- `structure` — Structure of the table. Format `'colunmn1_name column1_ype, column2_name column2_type, ...'`.
+
+**Returned value**
+
+A table with the specified structure for reading or writing data in the specified file.
 
 **Example**
 
-```sql
+Setting `user_files_path` and the contents of the file `test.csv`:
--- getting the first 10 lines of a table that contains 3 columns of UInt32 type from a CSV file
+
-SELECT * FROM file('test.csv', 'CSV', 'column1 UInt32, column2 UInt32, column3 UInt32') LIMIT 10
+```bash
+$ grep user_files_path /etc/clickhouse-server/config.xml
+    <user_files_path>/var/lib/clickhouse/user_files/</user_files_path>
+
+$ cat /var/lib/clickhouse/user_files/test.csv
+    1,2,3
+    3,2,1
+    78,43,45
 ```
+
+Table from`test.csv` and selection of the first two rows from it:
+
+```sql
+SELECT *
+FROM file('test.csv', 'CSV', 'column1 UInt32, column2 UInt32, column3 UInt32')
+LIMIT 2
+```
+
+```
+┌─column1─┬─column2─┬─column3─┐
+│       1 │       2 │       3 │
+│       3 │       2 │       1 │
+└─────────┴─────────┴─────────┘
+```
+