-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Have a look at PostGraphile (in case you are using JavaScript and a PostgreSQL DB). With the advanced connection filter plugin (https://github.com/graphile-contrib/postgraphile-plugin-connection-filter) you get an automatically created filter for multiple items and their connection.
Checkout GraphJin its an automatic GraphQL to SQL compiler just point it at a Postgres of Mysql DB and start querying it with GraphQL. GraphJin auto-discovers the DB and then builds a single efficient query per GraphQL query https://github.com/dosco/graphjin