This is not what you are doing
You are sending all queries at the same time
If you really want to first get some data and after getting that data, then delete something, you should send the delete query in the Web GotText event of the first query
And remember
Use the companion app and Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by
Taifun.