Update create-external-table-as-select.md

Author: jovanpop-msft

articles/synapse-analytics/sql/create-external-table-as-select.md

@@ -17,17 +17,16 @@ In this article, you'll learn how to store query results to storage using SQL On
 
 ## Prerequisites
 
-Your first step is to review the articles below and make sure you've met the prerequisites:
+Your first step is to **create a database** where you will execute the queries. Then initialize the objects by executing [setup script](https://github.com/Azure-Samples/Synapse/blob/master/SQL/Samples/LdwSample/SampleDB.sql) on that database. This setup script will create the data sources, database scoped credentials, and external file formats that are used to read data in these samples.
 
-- [First-time setup](query-data-storage.md#first-time-setup)
-- [Prerequisites](query-data-storage.md#prerequisites)
+followi instructiong in this artivle to create data sources, database scoped credentials, and external file formats that are used to write data into the output storage.
 
 ## Create external table as select
 
 You can use the CREATE EXTERNAL TABLE AS SELECT (CETAS) statement to store the query results to  storage.
 
 > [!NOTE]
-> Change the first line in the query, i.e., [mydbname], so you're using the database you created. If you have not created a database, please read [First-time setup](query-data-storage.md#first-time-setup). You need to change LOCATION for MyDataSource external data source to point to location you have write permission for. 
+> Change the first line in the query, i.e., [mydbname], so you're using the database you created.
 
 ```sql
 USE [mydbname];
@@ -58,8 +57,9 @@ SELECT
     *
 FROM
     OPENROWSET(
-        BULK 'https://sqlondemandstorage.blob.core.windows.net/csv/population-unix/population.csv',
-        FORMAT='CSV'
+        BULK 'csv/population-unix/population.csv',
+        DATA_SOURCE = 'sqlondemanddemo',
+        FORMAT = 'CSV', PARSER_VERSION = '2.0',
     ) WITH (
         CountryCode varchar(4),
         CountryName varchar(64),
@@ -74,7 +74,7 @@ FROM
 You can use the external table created through CETAS like a regular external table.
 
 > [!NOTE]
-> Change the first line in the query, i.e., [mydbname], so you're using the database you created. If you have not created a database, please read [First-time setup](query-data-storage.md#first-time-setup).
+> Change the first line in the query, i.e., [mydbname], so you're using the database you created.
 
 ```sql
 USE [mydbname];