MANAGING DATABASES WITH ORACLE QUIZ

Columns that are frequently used with equal conditions in WHERE clauses are good candidates for indexes.

Indexes are created to enforce uniqueness on columns.

Indexes are created with the ALTER TABLE command.

Indexes are created to enable fast retrieval by column values.

You can add a column at any time as long as it is a NULL column.

You cannot increase or decrease the number of decimal places.

You can drop a column at any time.

You can increase the number of characters in character columns or the number of digits in numeric columns

AFTER

INSTEAD OF

BEFORE

DURING

False

True

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.

If there are no syntax errors, you will receive the message "NO ERRORS."

True

False

A period ( . ) followed by [Enter].

A colon ( : ) followed by [Enter].

A semicolon ( ; ) followed by [Enter].

A left slash ( ) followed by [Enter].

False

True

CONTENTS

LIST

CURRENT

BUFFER

OnLine ReDo file

Offline ReDo file

Datafile

Control file