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I searched online but could not find particularly consolidated source of what happens when you execute an update query. I know that there are a few actions happening like create redo data and logs etc.

Can experts please explain the step by step actions which happen on udpate execution

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Did you read the Concepts guide? It's all explained in there. – a_horse_with_no_name Jan 3 at 15:45
Is that a book? – lordlupine Jan 3 at 16:32

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