If you want you can call our tech support and we can help you with setting up a simple transaction group that takes data from the PLC and puts it in the database.
The basic idea is to create a Standard transaction group that has a mode of DB to OPC. Select the database and table you want to pull data from. At the very bottom of the Action tab you can select UPDATE / SELECT. We will be using the SELECT mode since the group is in DB > OPC. When selecting you can choose the first record, last record or use a custom where clause to choose a record from the database table.
Now, you can drag in all of the PLC tags from the OPC browser into the group that you want to write to. Each item has a Target. You can map each tag to a column of the table. When Ignition chooses a record we will take each cell from the row and write it to each tag based on the mapping.
Hopefully this can get you started.