I am working on a project and the data base icon was showing on the bottom left of the editor. Then i started another project and choose the blank template to start from scratch then I noticed there is no database icon. It was also not there in the previous project at first but then it appeared. Please help me out
This issue is not code related and therefore should not be posted in the Wix Corvid Forum.
As your issue is about missing options in the Wix Editor itself, you should be contacting Wix Support either by support ticket or telephone call directly.
https://support.wix.com/en/article/contacting-wix-support
Wix Support own pages will help you with the adding dataset to your page.
https://support.wix.com/en/article/adding-and-setting-up-a-dataset
Finally, if you are wanting to use Wix Corvid on your site, then please make sure to enable Corvid on your site if you are wanting to work with.
https://support.wix.com/en/article/getting-started-with-corvid-by-wix#step-2-enable-corvid-1