Abstract: JSON (Java Script Online Notation) is a data exchange format like XML, however JSON is simpler, less verbose and can be faster parsed than XML. In this way JSON becomes more and more important especially when data is exchanged by RESTful web services. The use of XML declines in favor of JSON.With Release 7.3 TR 3 scalar and aggregate functions were integrated into SQL on Db2 for i, for generating JSON objects, arrays, literals and for combining JSON components into complete hierarchical JSON-documents. Since 7.5 TR 1 it is even possible to modify/update JSON Documents/Data
With the JSON_TABLE table function on the other hand JSON documents can be parsed, converted into a relational representation and data picked specifically out. Additional scalar functions allow SQL to directly access JSON documents located within the IFS (Integrated File System) or in source physical file members.
Last but not least IBM provides SQL http-functions for getting access to web services. In composition with the JSON_TABLE function the JSON answers returned by web services can be consumed within a SELECT-Statement.
Learning Objectives: Get an introduction into JSON basics. Learn how JSON object and arrays can be generated, concatenated or nested and composed into JSON documents.
Discover how JSON documents located in either the IFS or a column of a table or JSON answers returned by web services can be parsed with the JSON_TABLE table function, converted into a relational representation and data specifically selected.
You’ll also get an overview over the new http-functions and how to use them for getting access to web services.
Audience: Developers and Users who are experienced in SQL Queries and want to create JSON data with SQL.
Developers and Users who need to process JSON documents located in either SQL tables or the IFS or JSON answers returned by web services.
Everybody who simply wants to enhance his SQL know-how.
