The answer to yesterday’s Simple Puzzle Using Union and Union All, explained with an image. My UNION vs. UNION ALL article explains why it works.
Solving SQL Puzzles With Set-Based Thinking
Set-based thinking solves three SQL puzzles with grouping, anti-joins, and windows, then turns each solution into a repeatable query habit.
SQL SERVER – 2005 – Find Nth Highest Record from Database Table – Using Ranking Function ROW_NUMBER
Nicholas Paldino shared a neat way to find the Nth Highest Record from a table in SQL Server 2005 using the ranking function ROW_NUMBER. Here is his query.
SQL SERVER – How to Retrieve TOP and BOTTOM Rows Together using T-SQL – Part 3
Part 3 on how to retrieve TOP and BOTTOM rows together: Dave Arthur’s solution uses UNION ALL instead of an OR clause, and it is quite good.
SQL SERVER – How to Retrieve TOP and BOTTOM Rows Together using T-SQL
Need TOP 1 and BOTTOM 1 in one result? UNION fails with two ORDER BY clauses. Here is a simple T-SQL way to retrieve TOP and BOTTOM Rows together.
Salary Ranges: Match Overlapping Intervals in SQL Server
Match salary ranges using both boundaries of the job and candidate intervals. Define open bounds and test containment, endpoint contact and invalid input.
Matching Two Customer Lists When Names and Emails Are Messy
Clean the text, climb from safe rules to fuzzy ones, and keep one best answer per subscriber. A ladder of joins you can paste into SSMS today.