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About MySQL in triggers old and new

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1. When using the INSERT statement, if there is no data in the original table, then the newly inserted data is new for the table after inserting the data:

2. When a DELETE statement is used, the deleted data is OD, relative to the data in the table after the data is deleted:

3. When using the UPDATE statement, when the original table data is modified relative to the data in the table after the modification of the data is old, and modified data after the table modified the data is new,:

About MySQL in triggers old and new

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