Report Builder Min Value and Max Value from Same Dataset

They're just sample data to be able to run the query.

It looks like your original table name was "DB.RECORD", so you would replace #testTable with DB.RECORD.

The "tt" is a table alias -- a short name for the table that you can use in the query to indicate which table a column comes from. You can leave the alias "tt" or change it to something like "REC" (short for RECORD) or whatever else you want to use.