Sample External Data with READ_NOS | VantageCloud Lake - Sampling External Data in Place Using READ_NOS - Teradata VantageCloud Lake

Preview the contents of external object storage by using the READ_NOS table operator. In this example, the payload column contains the data.

The examples and results show a sample river flow data set. To use your own data, replace the table and column names, and authorization object.

1. To run NOS-related commands, log on to the database as a user with the required privileges.
2. To see sample rows without column names:

   SELECT TOP 2 * FROM (
   LOCATION='YOUR-OBJECT-STORE-URI'
   AUTHORIZATION=authorization_object
   ) AS D;

   See Variable Substitutions for Examples for the credentials and location values for the sample river flow data set.

Example: Sampling External Data in Place Using READ_NOS

SELECT TOP 2 * FROM (
LOCATION='/s3/td-usgs-public.s3.amazonaws.com/CSVDATA/'
AUTHORIZATION=MyAuthObj
) AS D;

Your result is similar to the following:

     Location /S3/s3.amazonaws.com/td-usgs-public/CSVDATA/09429070/2018/07/
  GageHeight2     ?
         Flow     ?
      site_no     9429070
     datetime 2018-07-02 14:35
Precipitation  1.16
   GageHeight     ?

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

The output is displayed vertically for readability.