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

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

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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?

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

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Managing Databases with Oracle
Which of the following is not true about indexes?

Columns that are frequently used with equal conditions in WHERE clauses are good candidates for indexes.
Indexes are created with the ALTER TABLE command.
Indexes are created to enforce uniqueness on columns.
Indexes are created to enable fast retrieval by column values.

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