Splunk Database (DB) Connect is a general-purpose SQL (Structured Query Language) database extension/plugin for Splunk that permits easy integration between database information and Splunk queries/reports. Splunk DB Connect is EFFECTIVELY used to combine structured data from databases with unstructured machine data, and Splunk Enterprise can then be used to uncover insights from the combined data. 

Some of the benefits of using Splunk Database Connect connect are as follows:   

• By using Splunk DB Connect, you are adding new data inputs for Splunk Enterprise, i.e., adding additional sources of data to Splunk Enterprise. Splunk DB Connect lets you import your database tables, ROWS, and columns directly into Splunk Enterprise, which then indexes them. Once that relational data is within Splunk Enterprise, you can analyze and visualize it the same way you would any other Splunk Enterprise data.
• In addition, Splunk DB Connect enables you to write your Splunk Enterprise data back to your relational databases.
• With DB Connect, you can reference fields from an external database that MATCH fields in your event data, using the Database Lookup feature. This way, you can enrich your event data with more MEANINGFUL information.