To query a user's mobile phone and WeChat number, the following SQL statement can be used.

HackerRank isn’t just a random collection of problems; they’ve organized their SQL section pretty well. You can find challenges that cover everything from basic SELECT statements to more involved ...

A small region of the brain, known as the ventral tegmental area (VTA), plays a key role in how we process rewards. It produces dopamine, a neuromodulator that helps predict future rewards based on ...

Many dismiss warehousing simply as storage. But they couldn’t be more wrong: a warehouse is a dynamic hub of activity that is the foundation of the entire ecommerce order fulfillment process. From ...

This project showcases the implementation of a Bike Sales Data Analysis using SQL. It involves creating and managing tables, performing CRUD operations, and executing advanced SQL queries. The primary ...

The more events a user has per day, the more active they are considered to be. Therefore, the activity ranking is the ranking of the number of events. First, group and aggregate the number of events ...

Abstract: The performance of array antennas is critical in modern communication systems, particularly in applications that demand accurate beamforming and minimal side lobe interference. This paper ...