Managing Databases with Oracle
To obtain the structure of an Oracle table, the command to use is:

DESCRIBE [TableName].
DESC TABLE [TableName].
DESCRIBE STRUCTURE [TableName].
STRUCTURE [TableName].

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Managing Databases with Oracle
Which statement about sequences is not true?

Sequences guarantee valid surrogate key values.
A sequence is an object that generates a sequential series of unique numbers.
Sequences are most often used to provide values for surrogate keys.
NextVal and CurrVal are both sequence methods.

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