Team, In our project, there is a requirement where I need to export

You can use Export SQL data to excel smart service to achieve that.

Try the download data subset plugin available from shared components.

Hi Mani,
You can use the following smart service "Export to Excel" which comes part of the plugin named "Export SQL and Report Data to EXCEL - V2". PFA the screenshot of the excel smart service

In the Tempo Interface if you need to download the data's by clicking a link then you can use this plugin from the link "forum.appian.com/.../summary". Here We don't need to create any base template, just by passing the data subset and by mentioning the required columns that needs to be displayed in Excel will create Excel on clicking the generated link. Exported data can be filtered and sorted to match what is shown on the UI. Examples has been provided in the above link itself.

Hi Mani,
In shared component there is plugin "Export cdt to excel " by using this plugin you can achieve your requirement. i can did this.