A.Manually clear warnings

B.Check history monitoring

C.Start and stop service instance

D.Delete service instance

A.Intelligent transportation

B.Finance

C.Digital government

D.Smart Park

A.Once the table is built, the table name cannot be modified

B.Once the table is built, no new columns can be added

C.Once the table is created, you can no longer modify the column name

D.The external keyword needs to be formulated when creating an external table

A.Write to disk first, then write to memory

B.Simultaneous writes to disk and memory

C.write to memory only

D.Write to memory first, then write to disk

A.False

B.True