A question popped up, which I thought was interesting. How can you create a
DB_LINK in Oracle without the DBA changing the
tnsnames.ora file? It’s actually quite easy, especially if the DBA sets the TNS address name the same as the instance’s service name or in older databases SID value.
- Do the following with the
It should return this when the server’s
mohawk and domain name is
If you’re reading this post, you most likely are trying to run the Oracle Database 11g or 12c
runInstaller program, and it’s failing a critical dependency check and displaying an error like the one below. If so, choose
n because if you choose
y it won’t launch the Oracle Installer.
Starting Oracle Universal Installer...
Checking Temp space: must be greater than 500 MB. Actual 30824 MB Passed
Checking swap space: must be greater than (more...)
Installing any Oracle database is tedious, but the installing the pre-requisites can be tedious. This post tries to simplify the process by creating a single
prereq.sh file for all the pre-requisite libraries. The file should contain the following:
yum install -y binutils \
This post shows you how to add the menu option and GUI to set users and groups. It’s quite a bit easier than mastering all the command-line syntax. It makes setting up the required user and group accounts for an Oracle Enterprise or MySQL database solution much easier.
You add the utility by calling the yum (Yellowdog Updater, Modified) utility like this:
yum installed -y system-config_users
You should see the following:
Occasionally, my students loose their network connection when copying their virtual machines. This article shows you how to rebuild your Internet connection.
The first step requires you to identify the port number on your host operating system, which is typically Windows OS or Mac OS X. You can find that by running the following search from a Mac OS X Terminal session or Windows OS Command session.
If you’re on the Mac OS X, you (more...)
What happens when you can’t get a PL/SQL Web Toolkit to work because it only prints to a web page? That’s more tedious because any
dbms_output.put_line command you embed only prints to a SQL*Plus session. The answer is quite simple, you create a test case and test it inside a SQL*Plus environment.
Here’s a sample web page that fails to run successfully …
While SQL Developer installs with a dbms_output view, some organizations close it before they distribute images or virtual machine (VM) instances. This post shows you how to re-enable the
Dbms Output view for SQL Developer.
- You need to open SQL Developer, which may look like this when the
DBMS_OUTPUT view isn’t visible.
- You need to click on the View menu option in SQL Developer and choose the Dbms Output dropdown menu (more...)
My vacation from my blog is officially over. The question that I’m answering today is: How can you pass a set of non-sequential ID values to a function and return a result set?
You need to create three object types for this example. They are:
- a list of numbers
- a record structure, declared as an object type without methods
- a list of the record structure
These are the SQL commands to create the required data (more...)
It was quite annoying to find that TurboTax couldn’t send me a text message to confirm my order of a second state. However, I made the mistake of clicking the “Confirm my account a different way (takes longer)” radio button to get to their web page.
After I got two-step verification enabled on their web site, now it’s impossible to order the second state software. It appears that once you click that button, the software (more...)
During the holidays, I check salaries for my students and the IT industry overall. I’m never surprised by the reality, after all salaries pay for return on skills and effort. Here’s my annual look, which some may find unkind but reality is seldom kind.
Before looking at IT salaries, it seems like a good opportunity to first look at the overall job market for Millennials in the United States. AOL provides a great graphic of (more...)