Does this mean that we can parameterise the SQL, so that for example we can insert a date (eg current month-end adate) into the query that is going to run?
You've been able to parameterise the SQL since 2.6. Add at least one parameter in the DataManager left panel, and your "Edit SQL" database block tabs will show a comment: Note: Insert parameters in custom SQL like this: SELECT * FROM p WHERE q={{MyParameter}} SELECT * FROM p WHERE q IN ({{MyParameter}})