Introduction When working with databases, you’ll often need to perform calculations across a set of rows related to the current row in your query. Whether you’re calculating a running total, ranking rows, or performing other complex aggregations, window functions in SQL provide a powerful way to achieve these tasks without resorting to more complicated subqueries

When working with databases, it’s sometimes necessary to compare two tables to ensure they have the same structure. Specifically, you might need to verify that two tables have the same columns before performing operations like data migrations or comparisons. This post will guide you through the process of checking if two tables have identical columns

In database management, identifying and handling duplicate records is crucial to ensure data integrity. This post will guide you through a SQL query designed to find duplicates based on a specific field. For this example, we’ll work with a table containing raw data and extract relevant information to identify duplicates. Understanding the Query Let’s say

When working with data, you often need to manipulate strings to extract meaningful information. A common scenario is having strings with segments separated by underscores (_), and you only need the last segment. For example, you might have strings like: In this blog post, we’ll explore how to extract the last segment of these strings