UNION vs. UNION ALL: What’s the difference, and which one should you be using? 🔹 UNION ALL just stacks rows from your queries. It's fast and simple. 🔹 UNION does the same thing, but then tries to ...
1. IT COMBINES BOTH THE TABLES. 2. NOTE -> SELECT FIELDS SHOULD BE SAME NO OF COLUMNS THEN ONLY IT RUNS OTHERWISE IT THROWS ERROR. 3. ONLY DIFF BETWEEN UNION AND UNION ALL IS UNION ELIMINATE THE ...
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