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.
- To run NOS-related commands, log on to the database as a user with the required privileges.
- If it does not exist, create the foreign table or ask your database administrator to create the foreign table called riverflow_json. See Setting Up to Run JSON Examples.
Run the following command to get the maximum and minimum values for a specific payload attribute, Flow in this example. It executes against the foreign table called riverflow_json and considers all records contained within the object as specified by the LOCATION clause in the foreign table.
SELECT MAX(CAST(payload.Flow AS FLOAT) ( FORMAT '-ZZZZ9.99')) , MIN(CAST(payload.Flow AS FLOAT) ( FORMAT '-(5)ZZZ9.99')) FROM riverflow_json;
Maximum(Payload.Flow) Minimum(Payload.Flow) --------------------- --------------------- 19000.00 -9.72