Programmer Help

1, Download of MongoDB: The official website of MongoDB is: http://www.mongodb.org/  MongoDB precompiled binary package download address: https://www.mongodb.com/download-center/community               You can download it on the official website, but I tried it. It's very troublesome. I found a simple way to download zip directly at this addres ...

preface The purpose of writing this article is to review and learn with you. The example code in the video takes the data of the Douban film top250 as an example. I will mark the code according to what I learned from the video for ease of understanding and learning from the video https://www.bilibili.com/video/BV12E411A7ZQ. . 1, Code ...

1, OverviewAs we all know, Redis is a high-performance data storage framework. In high concurrency system design, Redis is also a key component and a powerful tool for us to improve system performance. It is more and more important to deeply understand the high-performance principle of Redis. Of course, the high-performance design of Redis is a ...

Basic database operation Relational database SQL non relational database NoSQL (Not noly sql) common: redis, MongDB 1. Basic command line operation of MySQL Each line must be accompanied by; ending -- get into mysql -uroot -p -- Modify user name and password (actually modify the table where the password is stored) update mysql.user set authent ...

preface PostgresSQL is a single example multi database. Usually, a database instance contains multiple tablespaces and databases. One tablespace can store multiple databases. In this relationship, one tablespace can contain multiple databases, but a database can only belong to one tablespace and cannot be stored across tablespaces. Table space ...

1, Background introduction In view of security considerations, the superuser of the database is generally only in the hands of DBA students. Recently, many times such a scenario has happened. Students in the business make complaints about the structure of the table. The Tucao table is locked by the system process. After investigation, it is fo ...

Author: lomtom Personal website: lomtom.cn Official account No. Bosio Park Your support is my biggest motivation. Go series: Go (I) basic introductionGo (II) structureGo (III) go configuration fileGo (IV) Redis operationGo (V) go doesn't know how to use Gorm?Go (VI) to teach you how to call remotelyGo (VII) you said you wouldn't be co ...

As usual, the figure above first. In the last NOSQL article, a big man said that he would learn all the databases of the first figure. Today, he specially posted only one small figure. One is enough! preface Mongo does not mean Mango, but comes from the word Humongous. MongoDB is a NoSQL database based on distributed file storage. W ...

1. Database object 2. View overview 2.1 why use views? On the one hand, views can help us use some tables instead of all tables. On the other hand, they can also make different query views for different users. For example, for a salesperson of a company, we only want to show him some data, but some special data, such as purchase p ...

As a leading enterprise in the field of life services, Didi group is comprehensively testing and launching StarRocks. After more than a year of data system construction, we have gradually migrated some multidimensional data analysis requirements requiring real-time interactive query and ad hoc query from ClickHouse to StarRocks. StarRocks has a ...