Influxdb select last timestamp InfluxDB Cloud Use first() or last() with aggregateWindow() Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. Note: BOTTOM() returns the field value with the earliest timestamp if there’s a tie between two or more values for the smallest value. Aggregate data. I found the solution. But I need to get the current day in the query editor. To start your InfluxDB instance, use the influxdb3 serve command and provide the following:--object-store: Specifies the type of Object store to use. SELECT *, states_meta. One output table is produced for each input table. It might make sense to move the Common Issues with Functions/ Aggregation Functions and Selector Functions chapters up into the respective chapter as it's a bit hidden in it's current place. Arguments. SELECT LAST("water_level") FROM "h2o_feet" WHERE Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. Results range from [1 - 12]. InfluxDB supports the following: local file system (file), memory, S3 (and compatible services like Ceph or Minio) (s3), Google Cloud Storage (google), and Azure Blob Storage (azure). As a 3 days ago · A time type represents a single point in time with nanosecond precision. Problem: When I write points to the database with same timestamp but different tags (example : When visualized in the InfluxDB UI, each window table is displayed in a different color. Jan 18, 2018 · I am using Grafana 4. 8. InfluxDB Cloud SELECT DISTINCT server FROM table WHERE timetamp < CURRENT_TIMESTAMP Whereas I would like to use something like this to get a list of servers within the time window the user selects in Grafana: SELECT DISTINCT server FROM table WHERE $__timeFilter(timestamp) yes, everything in InfluxDB is stored as UTC timestamp. InfluxDB 3 Enterprise selector_last (expression, timestamp) Arguments. InfluxDB uses reservoir sampling to generate the random points. These all return null when I tried them, but it would be very useful to be able to query for these. Calculates UTC timestamp using system's real time clock. Note: last() drops empty tables. field_expression: Select the last value from field keys that match a regular expression (/^ [] /) Select the last value from a field within time windows Jan 8, 2025 · Every point stored in InfluxDB has an associated timestamp. 5k次。昨日在使用InfluxDB的last() 函数查询一组数据时发现了一些问题。根据官方文档说明：last()函数从输入表中返回最后一个非空记录。用于验证值是否存在的列。如果该列在最后一条记录中为空，则last() Aug 27, 2023 · I think it might be easier and more accurate to simply run a query on your InfluxDB that determines that amount of elapsed time (hours, days, etc. If the query includes a GROUP BY time() clause, the default time range is between 1677-09-21T00:12:43. InfluxDB + Flux: Get most recent timestamp for a measurement via Python API. Common issues with time syntax Using OR to select time multiple time intervals. The following two mistakes had to be corrected: 1) The values in the measurement were of type "string" and not "float". Avoid using an interval and origin_timestamp combination that results in a bin falling inside a time discontinuity. The first returned point is attached with the earliest timestamp and the last returned point is attached with the latest timestamp. Last(*) is returning the timestamp at submission time. Aug 7, 2019 · InfluxDB的存储引擎采用了专为时间序列数据设计的存储格式，具有高效的存储效率和查询性能。它结合了预写式日志（WAL）、缓存、时间结构合并树（TSM）和时间序列索引（TSI）等多个组件，共同实现数据的快速写入、持久化存储和高效查询。 Jul 22, 2024 · Use first() or last() with aggregateWindow() Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. 6 InfluxDB how to get the last recorded values. SELECT_clause [INTO_clause] FROM_clause [WHERE_clause Hello Grafana Community. How to retrieve the last data of I am experimenting with InfluxDB for timeseries datastore solution, and having an issue with using InfluxDB with different timezones. Your only option is to select data for particular day, order by time and limit 1 - so you will get the most recent record for that day time range. "°C" WHERE ("entity_id" = 'shelly_1l_our_room_device_temperature') AND time >= now() - 24h InfluxDB' request Select where time > timestamp. Convert timestamp format Calculate the duration between two timestamps Aug 30, 2021 · InfluxDB 中的数据类型可以分为五种 timestamp，float, int, bool, string。为了达到最优的压缩效果，InfluxDB 针对不同类型的数据，使用了不同的压缩算法。不 Jan 6, 2025 · Use sort() to order records within each table by specific columns and limit() to limit the number of records in output tables to a fixed number, n. Any help is deeply appreciated. month() returns the month of a specified time. InfluxDB supports the following Unix I am using InfluxDB 1. As the max value of each day is the last value of each day, I would like to set this time to 23:59 instead of 1:00. This though is not precise. This Timestamp 1588221453 should be 2020-04-30 06:37:33. Common Issues with DISTINCT() DISTINCT() and the INTO clause. Is timezone (or another thing) important to query by _time? or time offset to A Unix timestamp counts time since Unix Epoch (1970-01-01T00:00:00Z UTC) in specified units. And when I do a > instead of >= it counts only last ones. Output data. 854775806Z UTC. I have problem with time in influx. Jul 18, 2022 · 本文介绍常见的TSDB For InfluxDB®错误信息和关于它们的描述，以及常见的解决方案。如何处理报错“database name required”？当包含SHOW的查询没有明确指定一个数据库时，错误database name required就会发生。指定数据库的方法包括：在SHOW查询中使用ON子句，在 CLI 中使用USE <database_name>，或者在 HTTP API 请求中 6 days ago · GROUP BY * - Groups results by all tags GROUP BY <tag_key> - Groups results by a specific tag GROUP BY <tag_key>,<tag_key> - Groups results by more than one tag. Then a date comparison on the front-end is an int comparison within InfluxDB. You could create an Nov 15, 2024 · The InfluxDB v3 product line has seen significant enhancements in query performance and has made new management tooling available. 2 Get last stored value at a given time in influxDB. You can see that in the column headers of the returned data. Sorting with null values Nov 19, 2024 · Operate on timestamps with Flux Every point stored in InfluxDB has an associated timestamp. influxdb update time on rows. Aggregate functions take the values of all rows in a table and use them to perform an aggregate operation. Unlike systimestamp(), it does not change within the query execution timeframe and should be used in WHERE clause to filter designated timestamp column relative to current time, i. InfluxDB 3 Enterprise is a commercial version that builds on Core’s foundation, adding historical query capability, read replicas, high availability, scalability, and fine-grained security. . Use Flux to process and operate on timestamps to suit your needs. Each source has multiple editions. Commented Oct 20, 2020 at 16:07. But Grafana interpolates timestamp to your browser timezone by default (so your browser/local environment reports your local timezone UTC+2). 1574083831 should be Monday, 18. ORDER BY time DESC reverses that order such that InfluxDB returns the points with the most recent timestamps first. SELECT OK, so I think I figured out the answer, InfluxDB SQL has a limit operator, so this: select * from seriesName where lastSampleTime<time limit 1 will return the first sample right after lastSampleTime. 145224193Z and now(). The order of the tag keys is irrelevant. select * from "lv_table" limit 10 name: lv_table time Listing_id event_id event_type ---- ----- ----- ----- 1542711774019000 105202696 4 "leads" 1542711774020000 105497566 66 "view" 1542711774021000 95532296 66 "view" 1542711774021000 98830991 1 Select your InfluxDB Cloud region and cluster or your InfluxDB OSS URL and we’ll customize code examples for you. InfluxDB Cloud Select your InfluxDB Cloud region and cluster or your InfluxDB OSS URL and we’ll customize code examples for you. 004826 The date is correct in Influx but the time 6:12. 6 hosted in the cloud. These enhancements include an operational dashboard to monitor the health of your InfluxDB cluster, single sign-on (SSO) support in InfluxDB Cloud Dedicated, and new management APIs for tokens and databases. – In this weekly post we recap the most interesting InfluxDB timestamp and query time range and TICK-stack related issues, workarounds, how-tos and Q&A from GitHub, IRC and the InfluxDB Google Group that you might have missed in the last week or so. Can be a constant, column, or function, and any combination of string or arithmetic operators. In the CLI, specify the database to query data in a database other than the USEd database. 3rd, I would like the timestamp on the x-axis to show “DD MMM” only. you could set time zone. Output tables have the same schema as their corresponding input tables. 6. 15. Here is the query as an examp Skip to main content. 0 Querying the sum of last data of a point in time. For most SELECT statements, the default time range is between 1677-09-21 00:12:43. It’s important to note that if you forget that s duration literal, InfluxDB will assume that the timestamp is in nanoseconds. Most SELECT statements have a default time range between 1677 In SQL is possible to execute a query like: SELECT value DENSE_RANK OVER (PARTITION BY time ORDER BY variableName DESC) AS Rank FROM tableName Is not possible to run something like that in InfluxDB? influxdb Hi, I have created a interval variable with values such as 8h,1d,7d and 30d. But I am surprised with the fact that you are expecting 3 values for a single timestamp (unless you have different TAG values, refer this documentation how to store duplicate points ). Jan 12, 2024 · Hi! I am using Grafana v10. SAMPLE() Returns a random sample of N points for the specified field key. Q: What’s the maximum timestamp that InfluxDB can handle? Running this query will return the data only if it was saved in the last 5 minutes. value of a time series data in my influxdb together with the corresponding timestamp of die max. I didn't find a clear answer to this in the limited Flux Documentation present. Result from the InfluxDB is in the UTC. As the data was coming from nodered, I cleared the database and used parseFloat() in nodered before writing the data to influxdb. My data has multiple of timestamps which are stored in InfluxDB as Epoch time value for each packet. 3 days ago · Use the ORDER BY clause to sort data. How should I setup up indexes to make queries fast? A typical query is: select all data for sensor123 for the last 3 days. Each row in an output table contains the group key value and the label of one column of the input table. 6 days ago · The query selects data in the NOAA_water_database, the DEFAULT retention policy, and the h2o_feet measurement. When I use last() function, it gives me the last value of all fields with that tag, which is Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. expression: Expression to operate on. It is a recent-data engine 3 days ago · InfluxDB 3 Core, is our new open source product. Time zone shifts result in discontinuities–breaks in the continuity of time intervals (losing an hour or gaining an hour)–that can result in unexpected timestamps when using date_bin_wallclock. YYYY-MM-DD YYYY-MM-DDT00:00:00Z YYYY-MM-DDT00:00:00. time() can use any of the available join methods. Hi, iam currently trying to import old values but the timestamp is not correct. Saved searches Use saved searches to filter your results more quickly Common issues with time syntax Using OR to select time multiple time intervals. I wonder how can I use these timestamp in 3 days ago · By default, most SELECT statements query the data whose timestamps range from 1677-09-21 00:12:43. For each input table, columns outputs a table with the same group key columns and a new column containing the column labels in the input table. Jan 1, 1970 · 时间序列数据领先平台加入数百万使用 InfluxDB 进行实时预测、响应和适应的开发者。开始使用 InfluxDB Apr 28, 2016 · Last timestamp: > SELECT usage_idle FROM cpu WHERE cpu='cpu-total' ORDER BY time DESC LIMIT 1 name: cpu ----- time usage_idle 2016-04-27T19:15:25Z 96. 2 (docker image) with a Data source from InfluxDB. How to query data Here in my db measurement, the tags are "source", "edition", "date" and the field is "count". The . ORDER BY time DESC reverses the default timestamp order so that TSDB for InfluxDB® returns the points that are attached with the latest timestamp. For more information, see Frequently asked questions. About; InfluxDB' request Select where time > timestamp. aggregateWindow() segments data into windows of time, aggregates data in each The query just returns the latest timestamp of the time series, rather than the timestamp of the day where the max value occured! I used the following query: SELECT How to select last record in InfluxDB. I use grafana 10 and influxDB. Query the most recent timestamp (MAX/Last) for a specific key, in Influx. Stack Overflow. On Dec 28, 2015, at 2:35 PM, Regan Kuchan notifications@github. SAMPLE() supports all field types. I have used the below query to get a timestamp (so I believe it's close to done), but I'm Jan 9, 2025 · Avoid bins in time zone discontinuities. Select the last value from field keys that match a regular expression (/^ [] /) Select the last value from When using selector functions with a GROUP select last(Temperature) from raw_measure where ID =~ /4372502|4399699|4406512|4407840/ instead of returning the last Temperature observation of The query below works if you want to get the last timestamp for all the measurements from a given bucket. field Select the last value from field keys that match a regular expression (/^ [] /) Select the last value from a field within time windows (grouped by time) Enter your InfluxDB Cloud 3 days ago · range() filters rows based on time bounds. e. 1 The InfluxDB v3 product line has seen significant enhancements in query performance and has made new management tooling available. null time values remain null. 6. Type name: time. Start InfluxDB. 145224194 UTC to 2262-04-11T23:47:16. 0f", last_updated_ts) as timestamp, states_meta. I noticed also that for the just previous timestamp, for example if I have timestamp like this 1540300800000 ns, influxdb add a 6 at the begining and it becomes 61540300800000 ms. I would like to multiply the daily yield of the inverter with the electricity price, however, I know the price only when I get the calculation. Which method you use depends on your desired behavior: inner (Default): Drop any rows from both input streams that do not have a matching row in the other InfluxDB 3 Core, is our new open source product. The date as stored in InfluxDB could be a single epoch-based int, or store separate int fields for year, month, day within InfluxDB. 000Z How to select last record in InfluxDB. And it looks like influx is capable of execution this query rather efficiently. Clunky, but those are the data types we have. I have an inverter at home whose data I write into an InfluxDB and insert into grafana via the flux language. 5. Influx DB: query return wrong time values (everything is +1) 0. Column to use to verify the This can be done with last(). 1. InfluxDB' request Select where time > timestamp. For SELECT statements with a GROUP BY time() clause, the default time range is between 1677-09-21 00:12:43. 145224194 and 2262-04-11T23:47:16. Using DISTINCT() with the Nov 7, 2020 · 通过上篇博客，我们已经简单认识了InfluxDB了，其实在实际使用中，我们最常用的就是查询了，这篇博客就详细了解下InfluxDB的查询操作一、常用查询 1、从单个measurement查询所有的field和tag SELECT * FROM 3 days ago · InfluxDB 3 Core is in Public Alpha. Time literals are represented by RFC3339 timestamps. now() - offset from UTC Epoch in microseconds. 1 influxdb query last row of all series in a measurement Select your InfluxDB Cloud region and cluster or your InfluxDB OSS URL and we’ll customize code examples for you. It is a recent-data engine for So last() and group by cannot be used together?? Is this a influxdb restriction?? Sent from my iPhone. minute() returns the minute of a specified time. ; GROUP BY \regex\ - Groups results by tags that match the regular expression. SELECT "value" FROM "autogen". All the line charts uses my browsers time (UCT+2). columns. 3 days ago · The query returns the number of unique field values in the level description field key and the h2o_feet measurement. Aug 30, 2023 · Hello everyone, I still haven’t found an answer to my question on your community and that’s why I’m turning to you all. The problem is that Grafana wants me to set a time range, either in the calendar or in query options, while I want it to be showing the last value, regarding it’s lifetime. Will Postgres scale horizontally? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Hello there, What I want to do is to display the last value of the measurement. 145224194 UTC and now(). I have to group by this variable and get the count. You can change this behavior in the dashboard date. See Time Syntax for information on how to specify Oct 28, 2020 · 连接方式 influx -database 'data_db' -host '127. Note: PERCENTILE(<field_key>, 50) is nearly equivalent to MEDIAN(), except MEDIAN() returns the average of the two middle values if the field contains an even number of points. hour() returns the hour of a specified time. aggregateWindow() segments data into windows of time, aggregates data in each window into a single point using aggregate or selector functions, and then removes the time-based segmentation. Related questions. That means InfluxDB will query data with very different timestamps. Also i need start and end time of the interval. Function type signature (<-tables: stream [A], duration: duration,? columns: [string]) => stream [A] $ influx -database 'Dabtabase_name' -execute 'SELECT * FROM table_name' -format csv > test. Time syntax; Convert data types to time; Operate on time; Time syntax. Jan 6, 2025 · Use the ORDER BY clause to sort data. The problem is that I want to do this dynamically so I need to manipulate the timestamp using now() function. Convert given timestamp to influxdb timestamp. Doc umentation. Possible values Use join. Get last stored value at a given I am not getting correct output for SELECT LAST("value"), LAST("Name") FROM AssetAssetType GROUP BY "Name" – user584018. About; InfluxDB - Query milliseconds since last data point in a time series. @MdEnayat as I said, you can't get last timestamp (only last value != timestamp) with time grouping. Is it possible to retrieve only the timestamp from a influxDb query. csv The code works but timestamps are displayed as numbers as follows: 1609459200000000000 I would like to save it in a way where the timestamp is saved in RFC3339 format, like this: 2021-01-01T00:00:00 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company If you want to find for each window the difference between the first and last values you can use the spread function. temperatures from iot sensors (on different locations). 0. The problem is now I do a query that shows the spread for the last day, now it calculates it on UCT and not on columns() returns the column labels in each input table. The result is output as a new value in a single-row table. For a given time series query, I would like to display the first and last Nov 25, 2024 · Use first() or last() with aggregateWindow() Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. The units are determined by the precision you set when writing data to InfluxDB. If you’re just getting started with Flux queries, check out the following: Get started with Flux for a conceptual overview of Flux and parts of a Flux query. InfluxDB 3 Core, is our new open source product. Requirement: I want to create an influxDB database to store time-series data from multiple sensors reporting temperatures from different locations. 3. In addition, you would select your Unit in the Oct 28, 2024 · The first returned point is attached with the earliest timestamp and the last returned point is attached with the latest timestamp. Specifying time > (now()-5d) shouldn’t work at all since your timestamps are really odd. If the query includes a WHERE clause, the GROUP BY clause must appear after I noticed some data was missing in my InfluxDB permanent storage which was present in Home Assistant’s SQLite database in two places: states & statistics. The method used to define the group and resulting group key. Results range from [0 - 23]. I know that prometheus does return last data and we are trying to move from prometheus to influxDB and are stuck with this problem. 4. Last(*) works great for me for historical data with proper timestamps (in the same millennia. The list of columns to include or exclude (depending on the mode) in the grouping operation. ; Conditional expression syntax The group() function has the following parameters:. time() to join two streams of data based on time values in the _time column. I want to display current value in all single 6 days ago · date. For more information, see Function type signatures. See the docs for more information: link. 6 Is there a way So last() and group by cannot be used together?? Is this a influxdb restriction?? Sent from my iPhone. how to get latest timestamp data. The most efficient solution is to use these I am trying to query only the last point added to the database with a specific tag value. What I am looking for is, if there is not data for the time range provided, then get the latest data (could be 10m old or 5d old). 0 Given a time series db that is used for storing e. com wrote:. 7. Rows with a null value in the _time are filtered. Not an InfluxDB expert but I don’t think it is possible. The Web Admin Interface was deprecated as of InfluxDB 1. 9. select max(*) from temperatures where time >= now() Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Select your InfluxDB Cloud region and cluster or your InfluxDB OSS URL and we’ll customize code examples for you. _start and _stop columns are added to the group key. InfluxDB Clustered selector_last (expression, timestamp) Arguments. The header for last value of fungi_index is last and the header for the value of tree_age is tree_age. By default, the start time of the time range is specified 3 days ago · InfluxDB 3 Core, is our new open source product. Jan 6, 2025 · Use first() or last() with aggregateWindow() Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. These are the documentation for FluxQL for better reference: One way to solve this is to create your own date-to-int conversion in the front-end app. Querying future data with a GROUP BY time() clause. 4. SELECT_clause [INTO_clause] FROM_clause [WHERE_clause 3 days ago · Select data with SQL selector functions. November 2019 14:30:31 but is shown as 14:25 I have imported via API to use seconds as precision but its the same whith nanosecond How to select last record in InfluxDB. A special precision option is RFC3339 which returns the timestamp in RFC3339 format with nanosecond precision To select the latest 100 data points from a measurement I use the following query: select field1, field2 from measurement where time < now() order by time desc limit 100 However I need the How to select last record in InfluxDB. 7 and Grafana 8. 2nd, As you can see the timestamps all go to 1:00 (instead of the now() timestamp on the current day) which is the wrong time. 000Z May 23, 2019 · Hello @karthy,. aggregateWindow() segments data into windows of time, aggregates data in each InfluxDB 3 Core is in Public Alpha. To be precise spread calculates the difference between the minimum and maximum values (not first and last) but in an always-increasing series the two are the same. InfluxDB Cloud Jan 11, 2023 · The last example is a second precision timestamp. how to get the next value in influx db. Syntax. g. By default, InfluxDB returns results in ascending time order; the first point returned has the oldest timestamp and the last point returned has the most recent timestamp. 2. Although I agree, theoretically that shouldn’t cause problems. range of my available data in influxdb? 0. Oct 18, 2021 · 示例用相对时间指定时间范围 > SELECT "water_level" FROM "h2o_feet" WHERE time > now() - 1h 该查询返回过去一个小时内的数据。需要用空格分别将now()和-、-和1h隔开。用绝对时间和相对时间指定时间范围 3 days ago · Note: BOTTOM() returns the field value with the earliest timestamp if there’s a tie between two or more values for the smallest value. The precision of the timestamp can be controlled to return hours (h), minutes (m), seconds (s), milliseconds (ms), microseconds (u) or nanoseconds (ns). It is a recent-data engine for time series and event data. 15 Query the most recent timestamp (MAX/Last) for a specific key, in Influx. indicates the DEFAULT retention policy for the specified database. Use case: [Why is this important (helps with prioritizing requests)] Currently customers have to know when the last value was recorded in order to make sure that point is Now I got a specific timestamp for each point I want to use as the InfluxDB keys/timestamps but whatever I try - it keeps on adding the system time of my host device (But as I'm working with historical data I need to adjust the timespecs). Results range from [0 - 59]. Aug 10, 2023 · Have you run a query on your InfluxDB that determines that amount of elapsed time (hours, days, etc. If your SELECT statements include GROUP BY time() clauses, the query returns only the points whose timestamps fall in a specific time range. The output table schema is the same as the input table schema. ) since the last timestamp? In addition, you would select your Unit in the Standard Options to be one of these: Here 3 days ago · Select data with SQL selector functions. delete data that's older than one week automatically. Each input table’s group key value is modified to fit within the time bounds. : SELECT now() FROM long_sequence(200) will return the same timestamp for all rows 6 days ago · Timestamps. Most SELECT statements have a default time range between 1677 A time type represents a single point in time with nanosecond precision. range() adds a _start column with the value of start and a _stop column with the value of stop. Is there a way to create a InfluxQL query which selects all values except the last? My current InfluxDB query in Grafana looks like this: SELECT sum("Counter_Volume") AS "Volume per InfluxDB version used: 1. Querying data that occur after now() with a GROUP BY time() clause. For more InfluxDB tips, 6 days ago · date. InfluxDB how to get the last recorded values. See whether there are some data from last 24 hours. Queries that do not specify time bounds in the WHERE clause and do not include a GROUP BY time() clause use the minimum and maximum timestamps as the default time range. Also "at least 1 non-time field must be queried" seems like a strange limitation. I need to get the highest (aka most recent) timestamp for a specific Measurement in InfluxDB 2. Get last stored value at a given time in influxDB. entity_id FROM states INNER JOIN states ("%. I’d be very I'm a new influxdb user and my influxDB version is 1. join. last() does return the relevant timestamp, but not if you GROUP BY a tag. 6 days ago · Select your InfluxDB Cloud region and cluster or your InfluxDB OSS URL and we’ll customize code examples for you. I am pushing data on the basis of editions. mode. timeShift() adds a fixed duration to time columns. 1. Convert timestamp format; Calculate the duration between two timestamps; Retrieve the current time; Normalize irregular timestamps; Use timestamps and durations together Aug 23, 2019 · 背景在使用InfluxDB时，发现由于InfluxDB使用的是UTC时间，在查询时经常会遇到时区的问题，所以写了这篇文章，记录一下InfluxDB中时间相关的操作。时间格式 InfluxDB除了支epoch_time外，还支持rfc3339_date_time_string和rfc3339_like_date_time_string。 Looked into the docs once more. How send proper timestamp to influxdb with influxdb-python. Flux documentation says that filter() function is the equivalent of both SELECT and WHERE clauses, but all examples given are equivalent of WHERE clauses, nothing on SELECT. No matter if the last measurement was last week, last month, last year or maybe even 10 years before. 0. 2. Hey, I can’t manage to return the max. from(bucket: "you_bucket") |> range(start: 2024-06-06T18:28:00Z) |> filter(fn: (r) => r["_field"] == "your_field_name") |> last() returns the last row with a non-null value from each input table. with ES data source and have a dashboard that displays single stats and graphs for server status overview. I am able to repro on 0. In the InfluxDB API, specify the database in place of using the db query string Aug 7, 2021 · 文章浏览阅读8. Or take a look at this example from the docs. I’m getting weird behavior too. As a 6 days ago · sort() orders rows in each input table based on values in specified columns. value?! The query just returns the I noticed that previous timestamp results are also counted, even that I am doing time>timestamp. Oct 27, 2021 · 昨日在使用InfluxDB的last() 函数查询一组数据时发现了一些问题。根据官方文档说明： last()函数从输入表中返回最后一个非空记录。用于验证值是否存在的列。如果该列在最后一条记录中为空，则last()返回具有非空值的前一条记录。默认为"_value"。所以我理所应当认为只获取查询时间范围的最后一条 Dec 1, 2016 · SELECT LAST("fungi_index"),LAST("tree_age") FROM "forest" A: You’re right about query 1; it does return the last value of fungi_index and the value of tree_age at that time. 1' -port '8086' 输入命令 precision rfc3339 INSERT foo,dummy_tag="time_test&quo 1 day ago · Start InfluxDB. 10 How to select last record in InfluxDB. 13 is available in the nightly downloads. ; Execute queries to discover a variety of ways to run your queries. Essentially, I am writing all data points into InfluxDB with UTC timestamps, but in the queries it would be very convenient (especially for testing) to specify timestamp ranges using the local timezone of the server. Skip to main content. 3 days ago · Use first() or last() with aggregateWindow() Use first() and last() with aggregateWindow() to select the first or last records in time-based groups. So this one indicates the number of seconds that have passed since January 1st, 1970. If you consider the following data: max() returns the row with the maximum value in a specified column from each input table. Each output table has the same number of rows as the number of columns How do I get the start of the current day, using Grafana and InfluxDB? I saw that Grafana uses "now/d" in the timerange to do this. entity_id FROM states INNER JOIN states_meta ON states. now . 0 via the Flux query language using the Python API. Identify your InfluxDB Cloud cluster . How to make dashboard graph panel query scale time series values accordingly when time groupping interval changes? Example: I’m using InfluxDB datasource with InfluxDBのデータベースはポイント(points)という単位で保存します。ポイントは4つの要素から構成されます。メジャメント(measurement)、タグセット(tagset)、フィールドセット(fieldset)、タイムスタンプ(timestamp)です。 When I try to execute a query like this in influxdb: select * from . ka_gia: I checked correctness of the timestamp and it is correct. Syntax; Examples; ORDER BY time DESC. This type of join operation is common when joining two streams of time series data. From the second link below: Unfortunately, InfluxDB doesn’t allow you to do a query only for a time, and Grafana doesn’t let you choose which field to display in a Singlestat panel Flux provides if, then, and else conditional expressions that allow for powerful and flexible Flux queries. Python: Formatting time for influxdb. Should I use timestamp or integer for the time column? How do I set a retention policy? E. Where time begins and ends in InfluxDB. Input data must have a _time column of type time. 90077480629843 Calculate the duration between timestamps InfluxDB 0. InfluxDB does not support using the OR operator in the WHERE clause to specify multiple time intervals. Query in this format will return last timestamp data from the InfluxDB. ) since the last timestamp. 1 (disabled by default). Now the maximum temperature per sensor for the last hour can be queried using. tl;dr; The first() and last() selectors will NOT work consistently if the measurement have multiple fields, and fields have NULL values. ORDER BY time DESC reverses that order such that InfluxDB returns the points with the most recent Jan 6, 2025 · Avoid bins in time zone discontinuities. Troubleshooting,Time Series Database:This topic describes common error messages in Time Series Database (TSDB) for InfluxDB® and the corresponding solutions. rfutf pej zjvtj voxmqf ymdbo zjv blavhfv qutfp yasqsk frgnp

Influxdb select last timestamp. null time values remain null.