This is of course a logical illusion; under the hood, no matter the database, no matter the update scope, the whole document/row is physically rewritten on the disk.
Referring to columns and rows by name is a very neat trick. In fact, it's so neat I'm going to ask you to remember this fact for a later article. Just keep it tucked away in the part of your mind devoted to spreadsheet history, as we all have. The cell-row-bellum, I think its called? (I refuse to apologize.)
，更多细节参见新收录的资料
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