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

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.
Sequences guarantee valid surrogate key values.

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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?

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."
SQL*Plus will automatically show the errors to you.
To see the errors, enter SHOW ERRORS in SQL*Plus.

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

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

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