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

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

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Managing Databases with Oracle
In creating a procedure, you may get a message if you have compile errors. Which of the following is true?

If there are no syntax errors, you will receive the message "NO ERRORS."
To see the errors, enter SHOW ERRORS in SQL*Plus.
The line numbers reported match the line numbers you see in your text editor.
SQL*Plus will automatically show the errors to you.

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Managing Databases with Oracle
An Oracle System Change Number (SCN):

is incremented whenever a deadlock occurs.
is a value that keeps track of explicit locks.
is a value that is incremented whenever database changes are made.
is a value that is incremented whenever a dirty read occurs.

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