Unioning and Grouping Rows with SQL Window Functions, Common Table Expressions, and Subqueries for Data Analysis

Identifying Consecutive Dates Using Gaps-And-Islands Approach in MS SQL

Understanding the Challenge: Calculating Differences from Nested Subqueries with Optimized Solutions

How to Properly Implement INITCAP Logic in SQL Server Using Custom Functions and Views

Changing Collations in SQL Server: A Guide to Understanding and Implementing the Best Practices

Resolving the Divide by Zero Error in SQL Azure Studio: A Solution for Decimal Values

Handling Date and Time Conversion Errors in SQL Server

SQL Query for Summarizing Data: Total Time Spent by Reason and Status

Mastering SQL Aggregate Functions: A Guide to Effective Grouping and Null Handling

Detecting Duplicates in Tables: A Comprehensive Guide to Selecting and Identifying Unwanted Records