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What is UPDATE in SQL? Modifying rows for beginners

UPDATE is the SQL command for "change data in existing rows". Plain words: what to change, why WHERE is non-negotiable, how to update several columns at once. Before/after tables, beginner pitfalls, a quick recap, and three practice tasks at the end.

1 min readSQL · UPDATE · DML · tutorial

UPDATE is the command for changing data in rows that already exist. Not inserting new ones, not deleting — modifying what's there.

This article is currently in Russian. The full English translation is on the way.

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