Sample External CSV Data with a Foreign Table | NOS | Teradata Vantage - 17.10 - Sampling External Data In Place Using a Foreign Table - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - Native Object Store Getting Started Guide

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1214-171K
Language
English (United States)

Preview random rows of CSV data in place from external object store using a foreign table.

The examples use a sample river flow data set. To use your own data, replace the table and column names, and authorization object. See Variable Substitutions for Examples for the credentials and location values for the sample data set.

  1. To run NOS-related commands, log on to the database as a user with the required privileges.
  2. If it does not exist, create the foreign table or ask your database administrator to create the foreign table called riverflow_csv. See Setting Up to Run CSV Examples.
  3. To see sample records with the attribute names included before each string of values, issue the following command against the foreign table called riverflow_csv:
    SELECT TOP 2 *
    FROM riverflow_csv;

    Your results will be similar to the following:

        Location /S3/s3.amazonaws.com/td-usgs-public/CSVDATA/09400815/2018/07/10.csv
      GageHeight2     ?
             Flow   .00
          site_no     9400815
         datetime 2018-07-10 00:00
    Precipitation   .00
       GageHeight  -.01
    
         Location /S3/s3.amazonaws.com/td-usgs-public/CSVDATA/09400815/2018/07/12.csv
      GageHeight2     ?
             Flow   .00
          site_no     9400815
         datetime 2018-07-12 00:00
    Precipitation   .00
       GageHeight  -.01

    The output is displayed vertically for readability.