When a specified SQL operation — a DELETE, INSERT, or UPDATE — occurs on a table, a trigger can be activated that defines a set of actions.
当一个指定的SQL操作(如DELETE,INSERT，或者是UPDATE操作)作用于某张表时，一个定义了一组操作的触发器就可以被激活。
Members mapped to database-generated values need to be set to appropriate values after successful completion of INSERT or UPDATE operations.
与资料库产生的值对应的成员，必须在insert或update作业成功完成之后设定为适当值。
Members mapped to database-generated values need to be set to appropriate values after successful completion of INSERT or UPDATE operations.
与资料库产生的值对应的成员，必须在insert或update作业成功完成之后设定为适当值。
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