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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11251

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17584

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11299

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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How to add a column in select query with right join

I'm trying to find a way to add a country code to a database call record based on a phone number column. I have a table that contains countries and their dialing codes (called countries). I can query all records and append the country code, but I need to be able to filter and paginate the results. I'm working with a system that I don't have much control over, so adding new columns to the table or rewriting large chunks of code aren't really options. That's what I have to deal with. Country table. id name dial code 1 ireland 3532 united states 1 call log list. id start date

2024-01-10 18:08:33

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

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The definition and legality of the Ethereum blockchain

Course Introduction：It is often said that the prosperity of the cryptocurrency field is inseparable from the development of blockchain. Blockchain is actually a transaction database. As one of the largest platforms currently, many people know but do not understand the Ethereum blockchain. What is a chain? Especially now that people are paying more and more attention to legality, is the Ethereum blockchain legal? I also have doubts. In fact, the Ethereum blockchain itself has no legal status because it is an open source, decentralized technology platform designed to support the creation and execution of smart contracts. Next, the editor will tell you in detail. What is the Ethereum blockchain? Ethereum is the next largest blockchain in the crypto market, enabling decentralized, permissionless and censorship-resistant applications and organizations to be built. Ethereum blockchain and Android/iOS system

2024-01-27 comment 0 1078

Is Ethereum a blockchain?

Course Introduction：Yes, Ethereum is a blockchain platform that uses a distributed ledger system to record transaction information, forming a secure and immutable chain to ensure data integrity and transparency.

2024-04-24 comment 0 565

Ethereum Blockchain Explorer

Course Introduction：The Ethereum Blockchain Explorer allows users to view transactions, blocks, and smart contracts on the Ethereum network. The main functions include browsing transactions, viewing blocks, exploring smart contracts, querying accounts and monitoring the network. Common browsers include Etherscan, Blockcypher, Blockchain.com and Infura. These browsers can be used to track transactions, audit smart contracts, analyze networks, aid development, and conduct education and research.

2024-04-23 comment 0 1247

Mpeppe (MPEPE): A New Breed of Memecoin on Ethereum (ETH)'s Blockchain

Course Introduction：The Ethereum (ETH) community has rallied in significant numbers to support Mpeppe (MPEPE), a new utility memecoin that is making waves on the Ethereum (ETH) blockchain.

2024-08-08 comment 0 677

How will Ethereum benefit from modular blockchain?

Course Introduction：To bridge the gap with the defined roadmap, Ethereum is developing a new module called modular blockchain, which is a blockchain design approach in which different components of the system are split into independent modules, each Each module performs a specific function. The charm of this design is that the optimization of each module can amplify the optimization of other modules. Regarding the emergence of this design, many people will be curious about the impact of modular blockchain on Ethereum? It allows Ethereum to strive to develop. According to data analysis, the main impact is improved scalability, improved security, etc. Next, the editor will talk about it in detail. What exactly is the impact of modular blockchain on Ethereum? The impact of modular blockchain on Ethereum is mainly to improve scalability, modularize smart contracts, improve convenience, and adaptability.

2024-01-24 comment 0 572

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