Optimizing Session Duration Calculation in Postgres with Recursive CTEs and Joins

Extracting Strings After a Specific Character in an SQL Column Using Regular Expressions

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

Eliminating Duplicate Rows in PostgreSQL Join Operations Using GROUPING SETS and DISTINCT

Using ROW_NUMBER(), PARTITION_BY, and TOP/MAX to Get Maximum Values at Specific Positions in SQL

Querying Without Joining: Using NOT EXISTS() in Database Queries

Understanding Row-Level Security in PostgreSQL: A Policy Issue When Inserting Rows

Optimizing SQL Queries: A Step-by-Step Guide to Filtering Before Joining

Selecting Two Correlated Rows and Showing the Opposite of the Correlated Field in PostgreSQL

Grouping Sum Results by Custom Date Range with PostgreSQL: Adjusting the Start Time of a Day Range for Financial Reporting