DAY 17 | UNION & UNION ALL | 30 Day SQL Challenge | #sql #dataanalytics #dataengineering
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YouTubeStephen | Data
DAY 17 | UNION & UNION ALL | 30 Day SQL Challenge | #sql #dataanalytics #dataengineering
💻 Practice SQL for 30 Days with Stephen. In Day 17, we cover UNION and UNION ALL - how to stack result sets on top of each other to combine rows from multiple queries, remove duplicates with UNION, keep everything with UNION ALL, and use source tagging to track where each row came from when merging data across multiple sources. Full exercise ...
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