The Telegraf app of InfluxDB (https://www.influxdata.com/time-series-platform/telegraf/) could do it as it has an OPC UA client as input (https://docs.influxdata.com/telegraf/v1/plugins/#input-opcua or https://docs.influxdata.com/telegraf/v1/plugins/#input-opcua_listener) and SQL as output (https://docs.influxdata.com/telegraf/v1/plugins/#output-sql). So you would have to install it and create a configuration file to describe your agent with input opc ua and output SQL. It will generate and start filling a table in your database according to the data of the OPC tags subscribed.