Yes, but have to run the upgrade routine against the restored database.
Yes, but there are some limitations and it can be awkward.
No. An export cannot be used to restore and recover a damaged or missing data file.
A plan is developed by the Cost Based Optimizer. If it is making a mistake, you can give the CBO orders with (for example) hints or baselines. Or you make changes to the SQL, the data structures, the environment, the …
Plans are not intrinsically “good” or “bad”. An end user is not going to complain that (for example) “there are too many full table scans”, he is going to complain that “this screen refresh takes a minute, I need it …
The operations are the individual steps in a plan, such as searching an index or sorting a set of rows. Some operations will be iterated (e.g. Nested Loop), some can run (in effect) concurrently. Refer to this 13-minute video for …
Refer to our 13 minute video https://youtu.be/bcVbR_FPWKk?feature=shared
There is a method to follow to pick out the vital information. This works whether the plan is just half a dozen operations or many hundreds. Watch our related video for the details: https://youtu.be/bcVbR_FPWKk?feature=shared
A common method is EXPLAIN PLAN command followed by DBMS_XPLAN.DISPLAY to format and view the plan. But keep in mind that EXPLAIN PLAN parses your query to create the predicted plan on the current server. There are several reasons the …
It is used by the cost based optimizer for comparing different ways of executing the same statement. CBO parses your query, creates possibly hundreds of different ways to execute the query, then chooses the version with the lowest cost. And, …
It is strongly recommended that you have Oracle SQL and PL/SQL skills before taking a APEX training class. Having a fundamental knowledge of SQL will help you construct a better database which forms the foundation for all APEX applications. PL/SQL …
Best way for us to determine this is have you meet with our instructor to better understand your skills and goals for the class. This will help us help you make the best decision. Skillbuilders can do this and can …
You’ll be able to begin creating simple applications within a week but, realistically, to become proficient in developing secure web applications, 6 months of learning and developing.
No. The application developer uses a graphical user interface to construct the application, including the web pages. APEX constructs the HTML. However, knowledge of web dev languages (e.g. HTML, JavaScript, JSON) will let the developer create ever-more sophisticated applications.
No. While it is helpful to have some development experience, sometimes business users with no programming experience have learned APEX to convert spreadsheets into APEX applications. Skillbuilders is here to guide you to becoming an expert Oracle APEX Developer.