A data processing system is disclosed for accessing databases and updated data items and triggering event notifications. The data processing system may comprise a first database including a plurality of records, and a second database including a plurality of trigger indicators. The database system may further include a hardware processor configured to execute computer-executable instructions in order to: receive an update data item; identify a record corresponding to the update data item; cause an update to the record based on information included with the update data item; identify a trigger indicator corresponding to the update to the record; determine that a type of the trigger indicator matches a type of the update to the record; and generate an event notification including information included in the update.