Updating Values in a Table Based on Data from Another Table Using Joins

Subtracting Two CASE Statements with 'AND' Operator Condition Returns NULL When It Should Return a Specific Integer Value

Simplifying Your PostgreSQL Queries with Function Reuse and Weighted Scoring

Creating a JSON Column within a GROUP BY in PostgreSQL: A Powerful Data Aggregation Technique

Understanding SQL Querying for Weekly Data: Mastering Date-Related Functions to Avoid Overlapping Year Dates

Understanding How to Update a Table Column Based on Data From a View

Understanding PostgreSQL's check Constraint with Null Checking: A Comprehensive Guide

Understanding the Limitations of WHILE Loops in SQL: A Deep Dive into PL/pgSQL

Modifying SQL Queries to Handle Complex String Formats with PostgreSQL's split_part() Function

Deleting Rows Based on Age, Status, and Existence of Related Rows in PostgreSQL: A Practical Approach to Remove Incomplete or Old Data