SQL
SQL is the standard 'Query Language' that is used to obtain views of records and fields in databases.
A typical SQL statement is shown.
SELECT * FROM WINNERS
This would create a view containing all the fields in the table 'WINNERS'.
When using ADO to open a database Daisy calls a simple 'SQL Builder', which generates a record source.
Just choose the database or table and check the various boxes.

It is beyond the scope of this Help to give a full treatise on SQL here.
It is suggested that you :-