How to Insert Values into a Table with Unique Constraints Without Violating the Rules

Extracting Minimum and Maximum Dates from Multiple Rows by Sequence

How to Use SQL Joins and Aggregation Techniques for Data Retrieval with Multiple Detail Rows

Selecting Customers with Maximum Competence Date Within a Range: An Oracle Query Tutorial

Calculating Total Visits within a Year from the First Visit Date Using CTEs and INNER JOINs in SQL

Understanding SQL Limit and Row Number Functions: Mastering the Power of Row Numbers in Database Queries

Retrieving nth Row from a Table in Oracle, MySQL, and SQL Server: A Comparative Analysis

Optimizing SQL Queries with Common Table Expressions: Avoiding Subqueries for Better Performance

Retrieving Max(Amount) with Associated Type: A Comparative Analysis of Correlated Subqueries and Window Functions in SQL

Restoring Postgres Dumps with COPY Command: Understanding the Error and Solutions