Find a key that includes a specific text in Firebase

Hello - This is regarding Thunkable and Firebase

In the image you can see that i upload in blue - information around a specific date and time. And i Assume now the list includes thousands of records
Have two related questions. Is there a possibility to loop the keys to…

  1. Get the value from keys which contains “Datum: 30” only?
  2. Delete the whole key/value if number is below 30?

Hi @stefansladdeneng1
You will need to use a loop that runs for each item in the list “problem” and inside have two conditions using the “get object properties of” and “get substring” blocks