DP-203 · Question #5
Case Study 1 - Contoso, Ltd Overview Contoso, Ltd. is a clothing retailer based in Seattle. The company has 2,000 retail stores across the United States and an emerging online presence. The network co
The correct answer is CREATE EXTERNAL DATA SOURCE; CREATE EXTERNAL FILE FORMAT; CREATE EXTERNAL TABLE AS SELECT; CREATE EXTERNAL TABLE; CREATE DATABASE SCOPED CREDENTIAL. The correct sequence for setting up PolyBase external tables in Azure Synapse Analytics or SQL Server follows a logical dependency chain. You must first create a DATABASE SCOPED CREDENTIAL to securely store authentication details, then CREATE EXTERNAL DATA SOURCE to define where
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- CREATE EXTERNAL DATA SOURCE
- CREATE EXTERNAL FILE FORMAT
- CREATE EXTERNAL TABLE AS SELECT
- CREATE EXTERNAL TABLE
- CREATE DATABASE SCOPED CREDENTIAL
Explanation
The correct sequence for setting up PolyBase external tables in Azure Synapse Analytics or SQL Server follows a logical dependency chain. You must first create a DATABASE SCOPED CREDENTIAL to securely store authentication details, then CREATE EXTERNAL DATA SOURCE to define where the data lives (referencing the credential), then CREATE EXTERNAL FILE FORMAT to define how the data is structured (e.g., delimited text, Parquet), and finally CREATE EXTERNAL TABLE to define the schema mapping to the external data. CREATE EXTERNAL TABLE AS SELECT (CETAS) is used to export/transform data into external storage and would come before CREATE EXTERNAL TABLE in workflows where you are materializing data first before defining a reusable external table over it.
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