Data Model

InfluxDB stores time-series data in buckets and measurements; CrateDB stores data in schemas and tables.

• A bucket is a named location with a retention policy where time series data is stored.

• A series is a logical grouping of data defined by a shared measurement and tag set (fields do not define series).

• A measurement is similar to an SQL database table.

• A tag is similar to an indexed column in an SQL database.

• A field is similar to a non-indexed column in an SQL database.

• A point is similar to an SQL row.

Source: What are series and bucket in InfluxDB