Introduction to Deleting a Measurement in InfluxDB 2.0 - Shell/Bash

InfluxDB 2.0 is a popular time-series database that is widely used in various applications such as IoT, monitoring systems, and financial data analysis. In this tutorial, we will discuss how to delete a measurement in InfluxDB 2.0 using the Shell/Bash command-line interface.

Requirements

To follow along with this tutorial, you need:

• InfluxDB 2.0 installed on your system
• A basic understanding of the InfluxDB data model and the Shell/Bash command-line interface

Deleting a Measurement

To delete a measurement in InfluxDB 2.0, you can use the influx delete command. The syntax of the command is as follows:

influx delete -t <token> -o <org> -b <bucket> -p "<query>"

Here, <token> is the InfluxDB authentication token, <org> is the InfluxDB organization name, <bucket> is the name of the bucket that contains the measurement you want to delete, and <query> is the Flux query that identifies the measurement to delete.

For example, to delete a measurement named "cpu_usage" from a bucket named "server_metrics" in an organization named "my-org", you can use the following command:

influx delete -t my-token -o my-org -b server_metrics -p "from(bucket:\"server_metrics\")
|> range(start: 0)
|> filter(fn: (r) => r._measurement == \"cpu_usage\")
|> drop()"

Here, we are using a Flux query to identify the "cpu_usage" measurement in the "server_metrics" bucket and then dropping it.

Note that once you delete a measurement, all the data associated with it will also be deleted, so make sure you have a backup of the data if required.

Conclusion

In this tutorial, we have discussed how to delete a measurement in InfluxDB 2.0 using the Shell/Bash command-line interface. InfluxDB offers several other ways to delete measurements as well, such as using the HTTP API or the InfluxDB UI. Make sure you choose the method that best suits your needs.