Today, SQL Server’s STRING_AGG function proved to be a real game-changer while reconciling reports across two different systems. Instead of scanning multiple rows manually, I combined all descriptions ...

#️⃣ SQL Interview Question 🔹 Question: You are given the following input table: Name Hobbies A Singing A Drawing A Playing B Playing B Art C Painting C Reading Books 👉 Expected Output: Name Hobbies ...

SELECT STRING_AGG(k, ','), SUM(CAST(k AS BIGINT)) FROM (SELECT CAST(g AS VARCHAR) FROM strings UNION ALL SELECT CAST(x AS VARCHAR) FROM strings) tbl1(k) ...

Aggregate functions help turn large datasets into simple summaries used across many fields. GROUP BY and HAVING allow structured grouping and filtering of data for clearer reports. Functions like ...