update english oracle.md (#12332)

docs/docs/en/guide/datasource/oracle.md

@@ -5,7 +5,7 @@
 ## Datasource Parameters
 
 |     **Datasource**      |                      **Description**                                                                                                        |
-|-------------------------|-----------------------------------------------------------|
+|-------------------------|---------------------------------------------------------------------------------------------------------------------------------------------|
 | Datasource              | Select Oracle.                                                                                                                              |
 | Datasource Name         | Enter the name of the datasource.                                                                                                           |
 | Description             | Enter a description of the datasource.                                                                                                      |
@@ -13,8 +13,9 @@
 | Port                    | Enter the Oracle service port.                                                                                                              |
 | Username                | Set the username for Oracle connection.                                                                                                     |
 | Password                | Set the password for Oracle connection.                                                                                                     |
-| Database Name           | Enter the database name of the Oracle connection.         |
+| Database Name           | Enter the ServiceName or SID of the Oracle connection.                                                                                      |
-| jdbc connect parameters | Parameter settings for Oracle connection, in JSON format. |
+| ServiceName or SID      | Choose ServiceName or SID according to your entry in Database Name column.                                                                  |
+| jdbc connect parameters | Parameter settings for Oracle connection, in JSON format. For example, you can use {"schema": "abc"} to specify database abc for using.     |
 
 ## Native Supported