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MySQL LIKE clause We know that the SQL SELECT command is used to read data in MySQL, and we can use the WHERE clause in the SELECT statement to obtain the specified record.   Friends who need the framework source code can see my personal profile and contact me, Recommended distributed architecture source code.     An equal sign c ...

Introduction: Recently, through in-depth study of Spring Cloud Gateway, we found that the architecture design of this framework is very simple and effective, and the design of many components is very worth learning. This paper makes a brief introduction to Spring Cloud Gateway and a detailed analysis of the processing flow of a request for Spri ...

1, Introduction to big data 1. Data and data analysis 2. Role of data analysis Current situation analysisCause analysisForecast analysis 3. Basic steps of data analysis Clarify the purpose of analysisdata collectiondata processingData analysisData presentationReport writing 4. Big data What is big dataThe challenge of massive dataCharac ...

introduce Kafka was originally developed by Linkedin company. It is a distributed, partition and multi replica based on zookeeper protocol The biggest feature of the distributed messaging system is that it can process a large amount of data in real time to meet various demand scenarios: for example, the batch processing system based on ...

1, Full traversal keys 1) Explain It is used to list all key s that meet specific regular string rules. When the amount of redis data is large, the performance is poor. It should be avoided. Popular understanding: if there are few key values, you can directly use keys to obtain all data; After keys, you can use wildcard query. However, keys s ...

Distributed storage ShardingSphere (read / write separation & Distributed Transaction) We talked about the configuration and use of ShardingSphere earlier, but as a database middleware, it can do more than just divide databases and tables. This article wants to talk about It supports mysql read-write separation It supports distributed tra ...

Share some previous projects and accumulate some project experience We talked about how to configure the scratch redis earlier. This time, we'll do a collection example The website is the other shore map network: https://pic.netbian.com/4kmeinv/ analysis Collect all the pictures under the above link classification, analyze the website is 148 ...

10, ES 7. Advanced - aggregation Aggregation provides the ability to group and extract data from data. The simplest aggregation method is roughly equal to SQL Group by and SQL aggregation function (average, maximum and minimum) polymerization It is used to process the queried data # Including mil, average age GET bank/_search { "que ...

1 what is a Graph The pictures introduced in this article are different from the common pictures in daily life. Generally, in English, in order to distinguish these two different graphs, the former is called Image and the latter is called Graph. In Chinese, the former will be emphasized as "picture", while the latter will be emphasiz ...

1, Why build Elasticsearch cluster? Elasticsearch is an open source and highly extended distributed full-text search engine. The complexity of Lucene is hidden through a simple RESTful API, which makes full-text search simple. ES mainly solves the following problems: Retrieve relevant dataReturn statisticsBe fast 1. High availability The d ...