Data Table is a Text Field; Need it to be a conditional dropdown field

Bob,

From the pictures, it looks like you have a support application and are trying to get the Users to tell you what table, in other applications, they have an issue.   Is that correct?

If so, there is native way to get the names of other Quickbase tables into an application automatically.    You will need to create a Table of Table Names and a table of Applications.  You then can create a conditional drop down for the selection of the Table Name.