Selecting Random Rows from Tables with One-to-Many Relationships Using Joins

Optimizing Queries with PostgreSQL's DISTINCT ON Clause: A Simplified Approach to Aggregation and Subqueries

Merging Two Tables to Find Total Number of Books Sold for Each Day

Selecting Unrelated Records in GORM: A Deep Dive into Limitations and Workarounds

Understanding PostgresSQL Temporary Table Joins: A Deep Dive into Resolving Column Usage Errors with Temporary Tables

Optimizing Joins: How to Get a Distinct Count from Two Tables

Optimizing String Matching with SQL Indexing: A Performance Boost for Large Datasets

Converting Data Wide to Long with Sequential Dates Using Outer Apply in Oracle 12c and Later Versions

Querying Each Student's 3rd Best Assignment Mark in Each Subject Using Window Functions

SELECT DISTINCT ON (user_id, activity_type_id, EXTRACT(year FROM start_date_local))