Tag：comprehensive database
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DevChat Helper: Practicing on top of database and data analytics applications
Article Catalog I. About Devchat 1.1 What problem DevChat is used to solve 1.2 DevChat’s greatest strengths 1.3 How Developers Use DevChat Installation and configuration of DevChat 2.1 Installing DevChat in vscode 2.2 Obtaining and Configuring an Access Key 2.3 Test the configuration for success III. Testing support for database operations 3.1 Database and Data […]
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[MySQL] Don’t Allow Data You Don’t Know How to Insert
Article Catalog Previously on MySQL Details of this chapter Data insertion Insert complete rows Inserting multiple rows Insert the retrieved data How to consolidate learning Summary of this article Previously on MySQL Hello everyone, today is the nth time I write about MySQL, but also recently learned MySQL, and also want to record my learning […]
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ES operation and maintenance common commands, common troubleshooting commands, es cluster health, cluster node allocation information, slice allocation information, slice unallocated problem diagnosis, cluster open password access
catalogs Querying the health of a cluster View allocation information for all nodes in the cluster Total document count for query clusters/indexes Querying the cluster’s slice allocation information Query the number of indexes in the cluster, the number of documents, or which indexes are included in the cluster Querying the cluster’s snapshot storage information Viewing […]
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MySQL 8.0.34 and Navicat Premium 12 Installation and Configuration Tutorial
Tutorial Catalog MySQL Installation and Configuration Tutorial 8.0.34 (Hands-on Super Detailed Graphic Tutorial)I. Non-first-time installations (skip to the next section if this is the first installation)II. First Installation1, in the browser search “MySQL” to enter the official website, it is recommended to use “Bing” search!2、Enter the official website, select “Download” to enter the download page.3. […]
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Indexes in MySQL
Article Catalog 1. Overview of the index1.1 Index Overview1.2 Advantages1.3 Disadvantages1.6 Common Indexing Concepts1.6.1 Clustered Indexes1.6.2 Secondary indexes (auxiliary indexes, non-clustered indexes)1.6.3 Federated indexes 1.8 Principles of MyISAM Indexing1.9 MyISAM vs InnoDB1.10 Cost of Indexing 2. Principles of index creation and design2.1 Declaration and Use of Indexes2.1.1 Classification of indexes2.1.2 Creating indexes2.1.2.1 Creating indexes when […]
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[Spring]AOP advanced -JoinPoint and ProceedingJoinPoint
Article Catalog 1. Preamble2. Introduction to JoinPoint3. Obtaining information about the enhanced method4. ProceedingJoinPoint5. Obtaining information about the surround notification method6. Summary 1. Preamble In Spring AOP, JoinPoint and ProceedingJoinPoint are both key interfaces for getting information about methods in a cutover and controlling method execution. Their main difference lies in the way they are […]
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Mysql Query Statements
simple query ## Direct query Syntax: select field from table name; For example, select name, age from student; Ans: Query name and age from the student table. ## Conditional queries Syntax: select field from table name where Condition; For example, select name from student where age = 15; Ans: Query the student table for name […]
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MySQL Table Additions, Deletions and Changes (Basic)
Article Catalog ☕️1. CRUD☕️ 2. Create 2.1 Single-line data + full-column insertion 2.2 Multiple Rows + Specified Column Insertion 2.3 Insertion format on time (homework data table): 3. Query (Retrieve) 3.1 Full-column queries 3.2 Specified Column Queries 3.3 Query Fields as Expressions 3.4 Alias 3.5 De-weighting: DISTINCT 3.6 Sorting: ORDER BY 3.7 Conditional queries: WHERE […]
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Crawlers in action – people.com.cn
Article Catalog preambleDiscover the treasure. preamble In order to consolidate the knowledge gained, the author tries to start posting some study note type blogs for future review. Of course, if you can help some of the budding new technology learning that is also excellent. The author is a vegetable, if there are errors in the […]
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Logistics transportation information management system design and implementation
catalogs 1 System overview 2 System-related technologies 3 Requirements analysis 3.1 Needs analysis concepts 3.1.1 User workflow analysis 3.1.2 Analysis of user work requirements 3.2 System Functional Requirements Analysis 3.3 System Functional Use Case Analysis 3.3.1 Participants 3.3.2 Participant use case analysis 3.4 System feasibility analysis 4 System Design 4.1 Overall system functional design 4.2 […]