How to Get First Record (Earliest VALIDFROM) and Last Record (Latest VALIDTO) for a Specific Staff ID in SQL

Resolving Gaps and Islands in SQL Queries: A Difference of Row Numbers Approach

How to Retrieve Values from a Single Column Across Different Rows in SQL Server: A Correct Approach Using MIN() Function

Working with JSON Data in SQL Server: A Comprehensive Guide

Understanding the Challenge of Inserting a Value from a Select Statement for a Non-Identity Column: Solutions for SQL Server and Oracle Databases

Understanding Union Operations in SQL: A Step-by-Step Guide to Correcting Incorrect Results

Filtering Records by Date Range and Last Record on Same Day with Specific Plate Number in SQL Server

Unpivoting Multiple Rows: A Comprehensive Guide to Transforming Rows into Columns in SQL Server

Improving Your SQL Queries: A Guide to Table Joins and Date Literals

Querying Against the Result of EXEC in SQL Server: A Performance-Driven Approach