influxdb query multiple measurements
You could think of a measurement as a SQL table. Next, for each shard and each measurement, InfluxDB performs the following steps: Select matching series keys from the index, filtered by tag predicates in the WHERE clause. Now that butterflies and honeybees are tags, InfluxDB won’t have to scan every one of their values when it performs the queries above - this means that your queries are even faster.. Among some of InfluxDB's most interesting features is the ability to query multiple measurements with a single query using a regex in the FROM clause. Measurement example Measurement IFQL example Query data with InfluxQL. It stores data, and even meta data, over time. You can find the dataset and Flux query for this part are located in this repo. This collection of articles walks through common use cases for Flux queries. Common queries. If the ZoomRenderednn values at the first step are fields of a measurement you can also run a query on that measurement that dynamically returns the values you need. It works great, but this create multiple panels. Schema 1 - Multiple data encoded in a single tag ----- weather_sensor,crop=blueberries,location=plot-1.north temp=50.1 1472515200000000000 … First, InfluxDB determines the effective time range of the query and selects the shards to access (in InfluxDB Enterprise, shards may be on remote nodes). Use the InfluxDB 1.x /query compatibility endpoint to query data in InfluxDB Cloud and InfluxDB OSS 2.0 with InfluxQL. So instead of: SELECT
FROM WHERE type =~ /^(1|2)$/ GROUP BY __ you can run: Trigger alerts by comparing two measurements. Kapacitor allows you to create alerts based on two or more measurements. Data that are meant to coexist together should be stored in the same measurement. Execute queries. What I would really need is expressions using fields from multiple measurements. I can understand something would need to enforce alignment by the same grouping. Thank you for the inspiration, and I learned a bit about nested queries, but I can’t seem to get away from the multiple measurements. How to “monitor” the efficiency of a heat exchanger over time. Following this example is the fastest way to explore math across measurements. 0. via OPC-UA, with InfluxDB as time-series database. Most used Influx database queries Measurement. In this guide, we are going to compare two measurements, m1 and m2, and create an alert whenever the two measurements are different.As an added bonus, we’ll also include a query that can be used to graph the percentage difference between the two measurements. There are multiple ways to query data from InfluxDB including the InfluxDB UI, CLI, and API. This data is being gathered from the machine PLCs e.g. You can simply get the sandbox up and running, and copy and paste the code to try it for yourself. – cimere Jan 17 '20 at 7:41. The measurement acts as a container for tags, fields, and the time column, and the measurement name is the description of the data that are stored in the associated fields. InfluxDB schema design and data layout, Schema 1 - Query for multiple data encoded in a single tag case to consider: filtering queries on schema data (such as tags, series, measurements) by time. The critical fix that halved our query time however was splitting our measurements. Influxdb multiple dimensions. For example, a measurement C03_ROUTING_BG1 with field value_num = 1.0 would mean that coater/packager 03 is drawing bubble gums from bubble gum maker 1. Writing the Flux queries ... Get multiple group wise data query from InfluxDB in Grafana. As shown in the graph above, a database stores multiple measurements. InfluxData has released the technical preview of Flux, the new query language and engine for time series data, and with it comes the ability to perform math across measurements.