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What Is External Table in Sql Server?

Alexander Ross • • 7 min read
What Is External Table in Sql Server?
External Tables in SQL Server 2016 are used to set up the new Polybase feature with SQL Server. With this new feature (Polybase), you can connect to Azure blog storage or Hadoop to query non-relational or relational data from SSMS and integrate it with SQL Server relational tables.

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Then, what is external table in SQL?

An external table is a table whose data come from flat files stored outside of the database. Oracle can parse any file format supported by the SQL*Loader.

Also Know, what is SQL Server PolyBase? PolyBase is a technology that accesses and combines both non-relational and relational data, all from within SQL Server. It allows you to run queries on external data in Hadoop or Azure blob storage.

Similarly one may ask, what is file table in SQL Server?

A FileTable is a new user table which gets created within a FILESTREAM enabled database. Using the FileTable feature, organizations can now store files and documents within a special table in SQL Server and they will have the ability to access those files and documents from windows.

What is external table in hive?

An external table describes the metadata / schema on external files. External table files can be accessed and managed by processes outside of Hive. External tables can access data stored in sources such as Azure Storage Volumes (ASV) or remote HDFS locations.

Related Question Answers

What is bulk collect in Oracle?

A bulk collect is a method of fetching data where the PL/SQL engine tells the SQL engine to collect many rows at once and place them in a collection. The SQL engine retrieves all the rows and loads them into the collection and switches back to the PL/SQL engine.

What is difference between external table and SQL Loader?

Sql Loader: Load data from external file into Oracle database tables. So file system where files reside not need to be in the adress space of Oracle RDBMS server. EXTERNAL TABLES are data tables mapped from physical Operating System files to Oracle RDBMS data tables.
Alexander Ross
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Alexander Ross

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.