SQL Multiple SUM with Conditions in a Single Query: A Comprehensive Guide to Efficient Data Retrieval

Handling Reserved Keywords in SQL Server: Selecting a Column Name from Another Table

Finding Overlapping Date Periods with T-SQL Queries: A Step-by-Step Solution to Identify Combo Start and End Dates

Understanding How SQL Server Handles Timestamp Representation When Converting Decimal Values to Date and Time

Understanding Lookup for AID Values in EID Column with OUTER APPLY and DISTINCT

Improving SQL Pagination Performance with UNION ALL

Understanding SQL Server's Correct Usage: A Step-by-Step Guide to Avoiding Duplicate Records When Joining Tables

Conditional Calculations in SQL: Using Case Statements to Create New Fields Based on Results of Another Field

Optimizing SQL Joins: Best Practices and Strategies for Better Performance

Joining Tables on Two Fields: A Deep Dive into SQL Joins and OR Clauses