Working with SQL NULL values
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Jess Ramos | Tech, AI, & Data⚡️ on Instagram: "5 ways to handle NULL values in SQL ⬇️ Comment “SQL” for my free intro course to build your first mini project in only 30 min w/ no prior experience 🥳 1️⃣ COALESCE(column, ‘Unknown’) → Replace NULLs with a default value, can add multiple conditions 2️⃣ IFNULL(column, 0) → Replace NULLs with a default value 3️⃣ WHERE column IS NULL → Find rows with missing data 4️⃣ WHERE column IS NOT NULL → Filter out incomplete records 5️⃣ COUNT(column) vs COUNT(*
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Gulfam on Instagram: "Day 12 SQL: Remove specific cell data and set to NULL instantly. WHERE clause required - or ALL names disappear! Watch how UPDATE ... SET column = NULL WHERE condition; safely clears individual cell values. Perfect for data cleanup, anonymization, and SQL interviews. Always test with SELECT first! #sql #mysql #sqltutorial #learnsql #sqlinterview"
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