Post 1: Advanced Lookup Functions
Advanced Lookup Functions (XLOOKUP & VLOOKUP) Lookup functions are essential for combining data from different tables. Key Functions: Key Differences:
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SQL Practice -HealthCare
Database: Adventureworks Pro-Tip – pay extra attention to: Click to see the correct SQL Code sql Use code with caution.
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K-Means Clustering in Healthcare: Practical Examples
Key K-Means Clustering Concepts with Healthcare Examples Healthcare Interpretation Distance:Â How similar a patient is to a patient group. Centroid:Â The average
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Date Functions in SQL
SQL Study Notes – AdventureWorksDW2017 Common Date Functions 1. Get Year, Month, Day SELECT OrderDate, YEAR(OrderDate) AS OrderYear, MONTH(OrderDate) AS
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Exploring Database Structure with INFORMATION_SCHEMA
SQL Study Notes 1. Finding Columns by Name SELECT TABLE_NAME, COLUMN_NAME, DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME LIKE ‘%Business%’ ORDER BY
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UNION vs JOIN vs NOT EXISTS
SQL Study Notes – AdventureWorksDW2017 1. UNION and UNION ALL UNION combines results from two or more queries and removes
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GROUP BY and HAVING Practice
GROUP BY and HAVING – Understanding & Practice SQL Study Notes – AdventureWorksDW2017 This page covers GROUP BY, HAVING, LEFT
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Basic SQL Examples for Healthcare Analytics
Study Notes – SELECT, WHERE, ORDER BY, GROUP BY, HAVING & JOINs Core SQL skills that are used every day
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SQL Practice: GROUP BY & HAVING Examples
Date: June 17, 2026 Today I focused on GROUP BY and HAVING clauses. Below are clear examples using both AdventureWorksDW2017
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ProductKey vs ProductAlternateKey – Why Both Exist
One of the most confusing concepts in data modeling is understanding the difference between ProductKey and ProductAlternateKey. Simple Explanation: ProductKey