Hi All,
I have an upload screen where user can upload an excel, so that the uploaded records gets inserted into my table.
Am using Page Type- Data Load Wizard.

User will upload the excel file and the following report will be displayed,

Here I need to validate few columns like Entity,Description cannot be null and default value for currency should be EUR?
How can I create validations for this data on click of NEXT button. User cannot upload the data without these validations?
Am using APEX 18.1.
Please advise.
Thanks & Regards,
Nivetha Ramnath