Replacing String with Another String Plus Respective Position: A Deep Dive into Regular Expressions and Recursive CTEs

Standardizing Claims Data: A Refactored SQL Query for Simplified Analysis and Comparison

Finding Patients Who Visited the Same Doctor as Patient A on a Specific Day

LIMIT by GROUP in SQL (PostgreSQL) - How to Fetch Specific Data with ROW_NUMBER() Function

How to Retrieve Client Phone Number from a Database with Multiple Alternatives

Sorting by Condition Using MySQL Regular Expressions and Conditional Aggregation

Using Calculated Fields to Simplify Database Queries and Analysis

Grouping SQL Query by Each n Minutes Using Read-Only Access Without Joins or Subqueries

Understanding SQL Query Errors and Resolving Them

Understanding Foreign Key Constraints in SQL for Strong Database Relationships