Hi AnshilKumar Patel
You can link the search fields on your page to a specific column in the ExternalDatabaseConnector by configuring the Response Structure in the Response Structure tab of the External Database Connection document.
As you have connected to the SQL database using the External Database Connector in Studio 10.18.6, you can follow these steps:
After creating the entity, you can use the Query External Database activity to retrieve the data from the ExternalDatabaseConnector and link it to the search fields on your page.
To use this data in your microflow, see the Query External Database activity.
Here are some references
https://docs.mendix.com/refguide/external-database-connection/
https://www.mendix.com/evaluation-guide/app-capabilities/data-querying-management/
https://docs.mendix.com/refguide10/external-database-connection/
I hope this will help.