Puneet Verma Query Collections Duplicate value Delete Duplicate Records While Keeping One Efficiently remove duplicates but keep one copy. Way 1 Recommended way cte + window It’s a more modern SQL approach, clearer in intent when dealing with duplicates, and easier to adapt for more complex rules. Read Further Way 2: subquery Nth Largest Value Replace query … Read more
Logging levels help categorize log messages by severity, ensuring developers and system administrators can efficiently filter and analyze logs. This article explores different logging levels, their purposes, and best practices. What Are Logging Levels? Logging levels define the importance and severity of log messages. These levels help in managing log verbosity and ensuring that critical … Read more
A web server is a software that handles incoming requests from clients (usually browsers) and serves responses, such as web pages, data, or files. Python web servers can handle various protocols and are often used for serving websites, APIs, and static content. Standards for Python Web Applications to communicate with web servers Standards for Python … Read more
When building web applications in Python, it’s crucial to understand the foundational interfaces that enable communication between web servers and web applications. The two primary interfaces in Python are WSGI (Web Server Gateway Interface) and ASGI (Asynchronous Server Gateway Interface). While they may seem similar on the surface, they cater to different application needs and … Read more
Iterators and iterables are foundational concepts in Python, forming the basis of its looping mechanisms. They allow you to traverse collections like lists, tuples, dictionaries, and custom objects. Let’s explore them in detail. What is an Iterable? An iterable is any Python object that can be iterated over (i.e., you can go through its elements … Read more
Method Resolution Order (MRO) is a critical concept in object-oriented programming, particularly in Python, which determines the order in which classes are searched when looking for a method in a class hierarchy. This order is especially important when working with multiple inheritance, where a class inherits from more than one parent class. Python uses a … Read more
In this guide, we’ll explore commonly asked Python interview questions, along with explanations to help you ace your next interview. Let’s dive into Python’s rich ecosystem and its real-world applications! Python was created by whom and when? Python was created by Guido van Rossum and released in 1991. What is the latest Python version? The … Read more
The VI editor is a powerful, efficient, ubiquitous text editor in the Unix/Linux ecosystem. For many developers and system administrators, it is a critical tool for editing configuration files, writing scripts, or coding. While VI may initially seem daunting due to its unique modal interface, its shortcodes make it an extremely productive tool when mastered. … Read more
When Sun Microsystems acquired MySQL in 2008, the future looked bright for this widely-used open-source database. However, things took a sharp turn when Oracle Corporation, a major player in proprietary software, acquired Sun the following year. Concerns quickly grew within the open-source community, and many feared Oracle might alter MySQL’s development course, potentially shifting it … Read more
SQL wildcards (% and _) can be powerful for pattern matching, but they can also have performance implications, especially on large datasets. Here’s a breakdown of their usage and impact on performance: Leading Wildcards (%pattern) Performance Impact: Using a leading % disables index usage, as the database must perform a full scan to find matches. … Read more