Shulou(Shulou.com)06/01 Report--

(Create a new table that is the same as the original table, modify the table structure, copy the data in the original table to the new table, add triggers to the original table, copy the newly added data to the new table, add a very short time lock to the original table after all the data in the row is completed, name the new table as the original table, and delete the original table)

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