So, instead of Jill trying repeatedly to get the elusive fraction of time when the exclusive lock is available, she outsources repeated trials to Oracle Database 11, somewhat like a telephone programmed to re-try a busy number.
Now, Jill likes this feature so much that she shares it with all the other DBAs.
This course introduces students to the fundamentals of SQL using Oracle Database 11g database technology.
With your OCA certification, you will be able to demonstrate and promote the fact that you have the necessary skills to do your job effectively and you are certified by Oracle Coprporation the leader in Database Management Systems.
The following tables show the exams and the corresponding courses for OCA.
Our courses are designed to help the applicants to acquire the required hands-on skills and knowledge to successfully pass these exams.
The exams are administered by Pearson Vue an independent testing organization, with locations worldwide.
In Oracle Database 11 Now, when a DDL statement in the session does not get the exclusive lock, it will not error out. In that 10 seconds, it continually re-tries the DDL operation until it's successful or the time expires, whichever comes first.
When she issues: the statement hangs and does not error out.
In a typical business environment, the window for locking the table exclusively does open periodically, but the DBA may not be able to perform the alter command exactly at that time.
Of course, Jill can just keep on typing the same command over and over again until she gets an exclusive lock—or goes nuts, whichever comes first.
This course provides the essential SQL skills that allow developers to write queries against single and multiple tables, manipulate data in tables, and create database objects.
The students also learn to use single row functions to customize output, use conversion functions and conditional expressions and use group functions to report aggregated data.
Demonstrations and hands-on practice reinforce the fundamental concepts.