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Summary of several methods for removing duplicate data in SQL (window function for data deduplication)
catalogueMethod 1: distinctMethod 2: groupbyMethod 3: Window functionWhen using SQL to extract and analyze data, we often encounter scenarios where data is duplicated, requiring us to perform data deduplication and subsequent analysis.Taking the sales report of a certain e-commerce company as an example, we commonly use distinct or group by statements to deduplicate data...
Database Operation Tutorial 2023-05-12 12:13:26 -
sql server The issue of not being able to fully utilize the number of logical cores in the CPU in 2016
Recently, I encountered a problem in my work where sqlserver2016 cannot fully utilize the CPU core. Through analysis tools, I can see that;There are a total of 72 CPU cores, but SQL Only 40 cores can be used, and many people have encountered this problem...
Database Operation Tutorial 2023-05-12 12:12:37 -
Fuyou Truck's strategic cooperation with Qianhang Technology is expected to provide intelligent freight services for trunk lines with a mileage of one million kilometers this year
On May 12th, it was announced that Fuyou Trucks and Qianhang Technology jointly announced a strategic cooperation to connect Qianhang Technology's intelligent trucks to Fuyou Trucks' autonomous driving freight network, providing platform customers with mainline intelligent driving capacity services. Currently, it has been officially put into commercial operation...
Industry dynamics 2023-05-12 11:00:13 -
Online publishers are worried that Google AI search will harm website traffic revenue by using content for free
On May 12th, local time, Google announced on Wednesday that it will introduce generative artificial intelligence into search engines, which may be one of the biggest changes in Google's search engine history. But online publishers are generally concerned that the new Google search may affect the traffic on their websites...
internet 2023-05-12 10:00:59 -
On Thursday, US stocks: The Dow fell four times in a row, Google rose more than 4%, and JD.com and Pinduoduoduo rose more than 7%
On May 12th, it was reported that on Thursday, US time, the main stock indexes of the US stock market closed with mixed gains and losses, with the Nasdaq slightly rising. Data shows a slowdown in the US job market, while the market is once again concerned about the health of banks in the US region...
internet 2023-05-12 07:46:00
