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⛄ After learning some basic Datastream APIs yesterday, let's continue to learn the Table API and SQL on the upper layer of Datastream. Both APIs deal with relational data, which can reduce the development threshold of flink. Students who are interested in the contents of previous periods can refer to the following contents 👇: hadoop topics: ...

The second bullet in the series of software implementation Interview articles, the interview summary of MySQL and Oracle joint query and aggregate function. If you look at mysql, can't you have some oracle? In front of it, many companies have done many written test questions, and now there are few written test questions. How much ink do you hav ...

Summary of tree, binary tree and search algorithm preface So far, we have learned the basic concepts and common algorithms of tree and binary tree, and found that the tree has great use in searching. Here we make some summary and records. 1, Connecting knowledge points in series with mind map 2, Concept elaboration 1. Trees a. ...

C + + improve programming Mainly for C + + generic programming and STL technology Template 1 1. Concept Template is to establish a general mold, which greatly improves the reusability of code Template features The template cannot be used directly. It is just a frameworkThe universality of templates is not everything 2. Function templ ...

preface This paper introduces the principle of master-slave synchronization and demonstrates the actual operation. Based on the above, this paper studies the separation of reading and writing based on mycat database and table MyCat Example architecture diagram: 192.168.43.110: database test01 and database test02 have student tables resp ...

preface redis and zookeeper are the most widely used choices of distributed locks in the market. These two implementations have their own advantages. zookeeper: high availability, low performance and low concurrency. redis: high performance, medium availability and high concurrency Select the appropriate technology implementation according ...

After writing ten articles, I found that I haven't talked about the Ability that GAS has been using. Here is a brief introduction to skills. The relationship and interaction between the server and the client are not involved here, because I am not familiar with this aspect. First, let's introduce the basic flow chart of Gameplay Ability. Pict ...

grammar In the previous article, we wrote a simple lexical analyzer. See the article for details( Kotlin writes an interpreter (1) - lexical analysis ), with words, how to combine these words into correct sentences? Here is what grammar analysis should do. First, what is grammar? In short, grammar is the rules of using words to form sentence ...

preface At this time, I understand a word called long connection and short connection Long connection means to declare an event and then open the operation... And then close it. This is a long connection. The long connection can only be opened at the beginning and closed at the end. It can send what data it wants to send and receive what data ...

When using mplfinance, we can get a variety of image styles by setting the parameter style. The commonly used built-in styles of the style parameter are: 'bias',' blueskies', 'brasil', 'charles',' checkers', 'classic', 'default', 'mike', 'nightclouds',' sas', 'stars and strings',' yahoo '. Many of these built-in styles follow the habits of US s ...