docs: format_name

docs/doc/13-sql-reference/50-file-format-options.md

@@ -2,21 +2,26 @@
 title: Input & Output File Formats
 ---
 
-Databend accepts a variety of file formats both as a source and as a target for data loading or unloading. For example, you can load data into Databend from a file with the [COPY INTO table command](../14-sql-commands/10-dml/dml-copy-into-table.md) or the Streaming Load API. You can also unload data from Databend into a file with the [COPY INTO location command](../14-sql-commands/10-dml/dml-copy-into-location.md) command. To do so, you need to tell Databend what the file looks like using the following syntax:
+Databend accepts a variety of file formats both as a source and as a target for data loading or unloading. For example, you can load data into Databend from a file with the [COPY INTO table command](../14-sql-commands/10-dml/dml-copy-into-table.md) or the Streaming Load API. You can also unload data from Databend into a file with the [COPY INTO location command](../14-sql-commands/10-dml/dml-copy-into-location.md) command. 
+
+## Syntax
+
+To specify a file format in a statement, use the following syntax:
 
 ```sql
-FILE_FORMAT = ( TYPE = { CSV | TSV | NDJSON | PARQUET | XML } [ formatTypeOptions ] )
-```
+-- Specify a standard file format
+... FILE_FORMAT = ( TYPE = { CSV | TSV | NDJSON | PARQUET | XML } [ formatTypeOptions ] )
 
-`Type`: Specifies the file format. Must be one of the ones listed above that Databend supports.
+-- Specify a custom file format
+... FILE_FORMAT = ( FORMAT_NAME = '<your-custom-format>' )
+```
 
-:::note
-Databend currently supports XML as a source ONLY. Unloading data into an XML file is not supported yet.
-:::
+- Databend currently supports XML as a source ONLY. Unloading data into an XML file is not supported yet.
+- If FILE_FORMAT is not explicitly specified, the default format used is PARQUET.
 
-If `FILE_FORMAT` is not specified, use `FILE_FORMAT = (TYPE = PARQUET)` by default.
+### formatTypeOptions
 
-`formatTypeOptions`: Includes one or more options to describe other format details about the file. The options vary depending on the file format. See the sections below to find out the available options for each supported file format.
+`formatTypeOptions` includes one or more options to describe other format details about the file. The options vary depending on the file format. See the sections below to find out the available options for each supported file format.
 
 ```sql
 formatTypeOptions ::=

docs/doc/14-sql-commands/10-dml/dml-copy-into-table.md

@@ -535,6 +535,6 @@ CREATE TABLE t
 #### Step 3: Load with custom file format.
 
 ```sql
-COPY INTO t FROM @t_stage files=('data.csv') 
-FILE_FORMAT=(NAME='my_csv_format');
+COPY INTO t FROM @t_stage FILES=('data.csv') 
+FILE_FORMAT=(FORMAT_NAME='my_csv_format');
 ```