Why split the complex join-table operation into multiple single-table queries?

“Why do you need to split complex join-table operations into multiple single-table queries?” 》When we are optimizing the system, a common operation is to dismantle the complex join-table operation into multiple single-table operations, and then perform the join in the application. Why do you want to do this? I believe everyone can list a few

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Once made a net profit of 50 million a year, a well-known hair transplant institution was hit by thunder

I have been working in domestic head medical hair transplantation institutions for newborn hair transplantation for a few years. Seeing that the freezing period of the epidemic has passed and the store’s follow-up consultation is in sight, Yang Yu (pseudonym) was dumbfounded—on January 30, three consecutive posts were posted in the group’s Dingding group. A

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Shanghai Mayor Gong Zheng investigates Meituan, Ant Technology, Xiaohongshu

Gong Zheng, deputy secretary of the Shanghai Municipal Party Committee and mayor, investigated Meituan, Ant Technology, and Xiaohongshu on February 3, and put forward many hopes. When Gong Zhengzheng investigated private enterprises, he pointed out that it is necessary to continuously optimize the development environment of private enterprises, create a market-oriented, legalized, and internationalized business

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The market share ranks second, and it is difficult to conceal the anxiety of glory

Source: IDC Source: Yu Jian Column The smartphone market in 2022 will still be cold. According to data disclosed by IDC, in 2022, China’s smartphone shipments will be 286 million units, a year-on-year decrease of 13.2%, the largest decline in history. However, against the background of the industry’s misery, Honor has stepped out of the

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The technical preparations for the comprehensive registration system have been announced, and the Shanghai Stock Exchange will open its all-weather testing environment from February 2

Visit the original URL Shanghai Stock Exchange According to the Shanghai Stock Exchange technical service WeChat account on February 2, Shanghai Stock Exchange (“SSE” for short) and China Securities Depository and Clearing Corporation Limited (“China Clearing”) Shanghai Branch plan to open on February 2. The all-weather test environment is for market organizations to conduct joint

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CITIC Securities: Under carbon neutrality, electricity prices will rise, and it is imperative to smooth out electricity prices

Visit the original URL CITIC Securities believes that under the background of carbon neutrality policy, the low-carbonization of electricity is the key to energy transformation. The key to low-carbonization of electricity is the marketization of electricity, and the key to marketization of electricity is the reform of the electricity price mechanism. The direction of the

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If the dangerous radioactive source is lost again, don’t touch the mysterious metal on the roadside!

Recently, in the western Australian desert, workers were searching for a radioactive source the size of a button battery along a 1,400-kilometer road. How far is 1400 kilometers? It is about the same distance as driving from Beijing or Guangzhou to Shanghai. Between January 12 and 16, a truck transported a load of equipment along

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Fortune’s list of the world’s most admired companies in 2023 revealed

While times are tough for big tech companies right now, the all-star list of Fortune’s 2023 World’s Most Admired Companies list shows that the titans are as admired by their peers as ever. “Fortune” magazine continued to cooperate with Korn Ferry International (Korn Ferry), conducted this corporate reputation survey. The All-Star list ranks companies based

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Study reveals ancient Egyptian mummification secret recipe

Researchers have newly identified the recipe for a specific mixture of chemicals that ancient Egyptians used to preserve different body parts, according to a study published in Nature. The discovery, based on the analysis of an ancient embalming workshop in Egypt, will advance knowledge and understanding of ancient Egyptian mummification processes. The mummification process in

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