These are just my personal notes as I was working through the New to ServiceNow training modules.

A table in ServiceNow is like a database. You add records to a table, just like you add records to a database.

My application contained a table with both Open and Closed Records.

Modules can be used to only return certain records, such as only returning Open records. At All > Studio, I selected the application (NeedIt in this example) and selected Create Application File.

And then selected Navigation > Module > Create.

And then named the module Open since the purpose of this module is to just return open records. 

I was then able to select the Open module.

And only Open records were displayed.