Yes it is possible without buying additional SQL modules though I wouldn’t call the Tag Historian Module a SQL Module.
SQL Bridge Module grants the use of Transaction Groups.
Tag Historian Module, obviously allows for storing historical data but also the use of the Power Chart.
for the historian you would need to create your own ‘audit table’ in your db with triggers or something.
for every tag write too. which means you will have to also send every tagwrite to a db.
is there a Chart or document that shows the delineation of functions for the sql bridge. if i have "legacy database access" what would a system miss or be limited with by not having the Sql Bridge module.