Yangtze River: Great drop of Poyang Lake water level leads to hot discussion! Should dams be built or not? It's been controversial for 21 years
Poyang Lake, the largest freshwater lake in China, can be said to be the most important lake in the mainstream of the Yangtze River in China, and bears the development of many areas in the middle and lower reaches of the Yangtze River in China.However, over the years, because of the water problem of Poyang Lake, there has been a lot of heated discussion, that is, its changes will cause water surges and water drops...
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Teenagers' wisdom and exploration of future programming stars - ICode International Youth Programming China Final was held at Datong No. 3 Primary School, Furong District, Changsha
The competition is divided into four groups: graphical beginner group, graphical advanced group, Python beginner group, and Python advanced group, with each group competing for 60 minutes and 30 questions. If you want to successfully complete the competition, it takes an average of 2 minutes to complete each question...
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Chen Lijie, an internet addict, once played games for three days and two nights in a row. Later, he taught himself programming and was admitted to Tsinghua University at the age of 18
Should online games exist or not?In recent years, with the development and popularity of online games, this has become one of the most controversial discussions.Many people believe that playing with things leads to despair, and a considerable number of parents view online games as a raging beast, believing that children's rebellious behavior is caused by games...
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Can laptops always be plugged in? Will it damage the battery?
Have you ever worried about the battery life when using a laptop? Can it be used with the power supply plugged in all the time? Do I need to use up the battery before charging? How can batteries be used to ensure their lifespan?Today, let's answer everyone's questions one by one!Can I turn off my computer when it runs out of power?Most laptops nowadays use lithium batteries, and some friends may worry that deep or even excessive discharge will irretrievably damage the battery. In fact, there is a certain reason for this concern, but you should not be too careful not to use the battery...
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Air China responded to turbulence: one passenger and one flight attendant were injured and the flight landed normally
Sudden! Air China responded to turbulence: one passenger and one flight attendant were injured and the flight landed normallyOn July 10, 2023, Air China Flight CA1524 will take off from Shanghai Hongqiao Airport and its destination will be Beijing Capital International Airport. This flight is operated by A330-300 aircraft, with a flight age of 12 years...
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Where is the only grandson of Professor Qian Xuesen today? He is not the Vice President of Ali, but the chief staff officer of the Military Commission at the regimental level
Precious Images of Qian Lei and His Wife and SonHello everyone, I am Lan Tai.Today, Lantai will introduce Mr...
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Don't even watch news broadcasts without paying? People's Daily published an article, unveiling the fig leaf of television platforms
In the era of material desires, everyone's lives have improved. Ironically, life is so convenient,More and more 'routines'...
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Wenda: A Platform for Building Private Knowledge Bases in Enterprises Based on Large Models
Intelligent customer service, Personal Care Assistant and enterprise "digital separation" based on enterprise private knowledge baseConstruction and other application scenarios have become popular applications based on the LLM large model. Today, we recommend a project through which we can innovate our own private knowledge base products...
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Refuse curiosity and enter the dark web with caution
The world we live in is filled with various types of information every day. Entering keywords on search engines will bring up a lot of relevant content...
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Has the prophecy of nine experts regarding the Three Gorges Dam really come true now?
Has the prophecy of nine experts regarding the Three Gorges Dam really come true now?Thirty years ago, it was a cold winter, and a decision aroused the whole of China's thinking - to build the Three Gorges Dam.This is a mission beyond imagination, like throwing a huge stone into a lake, causing layers of ripples...
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Case: Yang Liwei, a space hero: Behind this is the pain of his daughter's early death and his wife's resignation
Behind the glory of China's space industry, Yang Liwei, the space hero, silently bears enormous sacrifice and pressure. His wife, Zhang Yumei, resolutely left her job in order to support his career...
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New Technical Director: Discovered who is using delete to delete data and directly fired!
delete Mysql MySQL delete MySQL MySQL MySQL MySQL MySQL InnoDBMyISAMMemory BMySQL MySQL 16KBMySQL MySQL B B MySQL MySQL MySQL ACID MySQL MySQL MySQL MySQL deletetruncatedrop drop > truncate >> DELETEDELETEDELETE from TABLE_NAME where xxxDELETE DMLtrigger InnoDB DELETEmysql delete ** DELETErollback segementcommit;delete from table_name,MyISAM InnoDB ;delete from table_name where xxx , InnoDBMyISAM;delete optimize table table_name InnoDBMyISAM deleteoptimize table SQLMcsjdemodemo2select concat(round(sum(DATA_LENGTH/1024/1024),2),'M') as table_size from information_schema.tables where table_schema='csjdemo' AND table_name='demo2';Sizeoptimize table demo2sizedelete redoundo rollback) dropDrop table TablenameDDLTruncate drop table table_name InnoDB MyISAM; drop (constrain)(trigger)(index); /, invalid drop deletetruncatedroptruncateDDL rollback segment trigger truncate table table_name InnoDBMyISAM truncate tabledrop table creat,create table drop table;truncate auto_incrementMyISAMtruncateauto_increment1deleteauto_incrementInnoDBtruncateauto_increment1deleteauto_incrementdeleteMySQLauto_increment1InnoDB auto_incrementdelete auto_increment1auto_increment SELECT 1+MAX(ai_col) FROM t truncateDELETE DELETEDELETEInnoDBdeletedeleteInnoDBInnoDBtablespace > segmentinode > Extent >PageInnodbsegmentextentsegmentFREE_PAGE32page32page1extent1extent32MBextent32MB4extentMySQLdata pageMySQL CrashInnodbInnoDBUndo****MySQLinformation_schema****innodb_file_per_table=1table_name...
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