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What is necessary for your query on an existing view to execute successfully?（）
- A、The underlying tables must have data.
- B、You need SELECT privileges on the view.
- C、The underlying tables must be in the same schema.
- D、You need SELECT privileges only on the underlying tables.
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更多 “What is necessary for your query on an existing view to execute successfully?（）A、The underlying tables must have data.B、You need SELECT privileges on the view.C、The underlying tables must be in the same schema.D、You need SELECT privileges only on the underlying tables.” 相关考题
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What is necessary for your query on an existing view to execute successfully? ()
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单选题What is necessary for your query on an existing view to execute successfully?（）A
The underlying tables must have data.B
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The underlying tables must be in the same schema.D
You need SELECT privileges only on the underlying tables.
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单选题A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing?（）A
Shift weight to the bowB
Shift weight to the center of the boatC
Shift weight to the sternD
Throw excess weight overboard
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单选题You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）A
the time when the last flashback operation in your database was performedB
the time when the first flashback operation in your database was performedC
a list of flashback operations performed in your database using SCN and timeD
the approximate time and the lowest system change number （SCN） to which you can flash back your database
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单选题What is true regarding subqueries?（）A
The inner query always sorts the results of the outer query.B
The outer query always sorts the results of the inner query.C
The outer query must return a value to the inner query.D
The inner query returns a value to the outer query.E
The inner query must always return a value or the outer query will give an error.
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