What happends when you execute one transcaction and then truncate another table?

You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?

This protects the library cache from becoming corrupted by concurrent modifications by two sessions or by one session trying to read information that is being modified by another one.

A "virtual" table name to query the current time is:

Which function is not in DBMS_OUTPUT?

When you issue the command "ALTER DATABASE BACKUP CONTROLFILE TO TRACE", a text script version of backup control file will be created. Where is this file located?

When a user process fails, this background process will clean up after it:

Order the following entities from the smallest to the largest:

What command is used to restore an "accidentally" dropped table?

"Select for Update" performs:

The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? select * from HR