Do you need to insert or update data depending on if it already exists?
You can do this with the MERGE statement in Oracle SQL.
An SQL join is a concept that allows you to retrieve data from two or more tables in a single query.
It’s what makes databases so useful, and allows for data to be stored in separate tables and combined when it is needed.
Let’s take a look at what SQL joins are, how to use them, and see some examples.
There are a large number of tools available for Oracle SQL developers and DBAs to use. It’s hard to know which tools are useful, will help you get the job done, and are widely used so you can get support easily.
However, there are people who have a lot of experience working with SQL, and I’ve asked 49 of them to share their answers to this question:
If you could only use 3 tools as an SQL developer or DBA, what would they be?
Let me tell you, the insights I received from these 49 database experts were nothing short of amazing. I’ve listed them all below, along with a summary of these tools at the end.
You want to avoid having bad data, right?
Data that doesn’t make sense, is missing when it should be populated, or refers to other data that does not exist.
We want to avoid these kinds of issues.
How can we do that?
We use constraints.
In this article, I’ll explain everything you need to know about constraints.
Do you want to learn SQL?
You’ve come to the right place.
On this page, you’ll find videos, links, and information for this Introduction to Oracle SQL course.
So, keep reading to see what you’ll learn and watch the videos in this course.
Oracle 18c has been released.
How does it impact you as a developer or a DBA?
How can you get access to it to play around with some of the new features?
Keep reading to find the answers to this, and more.
The software development industry has a lot of conferences.
And Oracle is no different.
So, you’re interested in becoming a database developer?
I’ll show you the path you can take, what skills are needed, and much more, in this article.
Changing the case of text in Oracle is a common task when comparing strings or validating data. Learn how to do it with the UPPER, LOWER, and INITCAP functions in this article.
Do you need to use sine, cosine, or tangent functions in your queries or database code?
Oracle has plenty of those functions you can use.
Learn how to use them and see some examples in this article.