WebOct 24, 2024 · Flink UV Posted by 细雪 on October 24, 2024. Flink SQL. 1 2 INSERT INTO cumulative_UV SELECT WINDOW_end,COUNT(DISTINCT user_id) as UV FROM Table ( CUMULATE(Table user_behavior,DESCRIPTOR(ts),INTERVAL '10' MINUTES,INTERVAL '1' DAY))) GROUP BY WINDOW_start,WINDOW_end Flink DataStream API. WebJul 31, 2007 · In addition, remember that COUNT (Distinct) can be useful, but SUM (Distinct) should very rarely, if ever, be used. In general, if you find that values you need to SUM () have been duplicated, summarize the table causing those duplicates separately and join it in as a derived table.
How to Count Unique Values in Microsoft Excel - How-To Geek
WebApr 20, 2016 · Counting Elements in Streams Apr. 20, 2016 • 2 likes • 3,220 views Download Now Download to read offline Engineering Uses the example of correct, high-througput, grouping and counting of streaming events as a backdrop for exploring the state-of-the art features of Apache Flink Jamie Grier Follow Advertisement Advertisement … WebApr 12, 2024 · 本文要介绍的就是周期内累计 PV,UV 指标在 flink 1.13 版本的最优解决方案。 3.预期的效果. 先来一个实际案例来看看在具体输入值的场景下,输出值应该长啥样。 指标:每天的截止当前分钟的累计 money(sum(money)),去重 id 数(count(distinct id))。 how to retrieve history from incognito mode
SELECT DISTINCT Apache Flink
WebAt present, Split Distinct optimization method cannot be used in Flink SQL with UDAF. The two split GROUP aggregations can also participate in LocalGlobal optimization. From flink1 Since version 9.0, it provides the function of COUNT DISTINCT automatic breaking up, which does not need to be rewritten manually. Agg With Filter WebMar 23, 2024 · 适用场景:LocalGlobal 优化针对普通聚合(例如 SUM、COUNT、MAX、MIN 和 AVG)有较好的效果,对于 COUNT DISTINCT 收效不明显,因为 COUNT DISTINCT 在 Local 聚合时,对于 DISTINCT KEY 的去重率不高,导致在 Global 节点仍然存在热点。在 FLink1.9.0 后的版本,框架支持自动打散优化。 WebMar 16, 2024 · Select the column of data in which you want to count distinct values. Go to the Data tab. Click on the Advanced command in the Sort and Filter section of the ribbon. This will open the Advanced Filter menu. Select the Filter the list in place option from the Action section. The List range should be the range of values previously selected in step 2. how to retrieve honkai impact 3 account