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

Mastering ASM Disk Groups: Dynamic SQL with IN Operator for Efficient Disk Management

How to Display Student and Lesson Counts for Each Teacher in a Single Select Statement

Forming Timedeltas for Segments of Rows in Time Series Data

Understanding the Fundamentals of Relational Databases with SQL Queries

Counting Rows for Every Day Between Two Date Columns in SQL Server

Conditional Aggregation for Related Records in SQL Server

Understanding Date Arithmetic in SQL without Resulting in TIMESTAMP

Understanding and Applying Group By with ROW_NUMBER() Function in SQL Server for Advanced Analytics

Understanding SQL Table Creation and Primary Keys: Best Practices for Database Development