# Hey All,
I am building a job that takes multiple table that contains a column with json data and want to flatten it and I am using extract nested data component to do this

**URL:** <https://matillioncommunity.discourse.group/t/hey-all-i-am-building-a-job-that-takes-multiple-table-that-contains-a-column-with-json-data-and-want-to-flatten-it-and-i-am-using-extract-nested-data-component-to-do-this/2182>\
**Category:** Matillion ETL\
**Created:** [May 18, 2023, 11:46am UTC](https://matillioncommunity.discourse.group/t/hey-all-i-am-building-a-job-that-takes-multiple-table-that-contains-a-column-with-json-data-and-want-to-flatten-it-and-i-am-using-extract-nested-data-component-to-do-this/2182 "2023-05-18T11:46:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![matthewbeasly21](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@matthewbeasly21](https://matillioncommunity.discourse.group/u/matthewbeasly21)\
**Post date:** [May 18, 2023, 11:46am UTC](https://matillioncommunity.discourse.group/t/hey-all-i-am-building-a-job-that-takes-multiple-table-that-contains-a-column-with-json-data-and-want-to-flatten-it-and-i-am-using-extract-nested-data-component-to-do-this/2182/1 "2023-05-18T11:46:18Z")

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But I am not sure how to use autofill feature to identify json columns automatically. Is there a way to automate this?