However, REFRESH IMMEDIATE system-maintained MQTs are updated with changes made to the underlying tables as a result of insert, update, or delete operations.
但是，对于 REFRESH IMMEDIATE 类型的系统维护的 MQT，可以通过 对底层表的更改（即 insert、update 或 delete 操作）来更新。
Neither REFRESH DEFERRED nor REFRESH IMMEDIATE system-maintained MQTs allow insert, update, or delete operations to be executed against them.
不管是REFRESH DEFERRED还是REFRESH immediate类型的系统维护的MQT，对它们的insert、update或delete操作都是不允许的。
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