In this tutorial, we will see some widely asked and most important interview questions on the MySQL CTE topic. If you are applying for the SQL developer role, then it is very necessary to be prepared with the CTE concept because it plays an important role along with JOINs and stored programs in MySQL. If …
In this guide, we will see how can we install the PostgreSQL database server with the client on the ubuntu operating system version 22.04. Thanks to the tools such as APT and snap, you can easily install Postgresql and the other required software programs with ease and in a couple of seconds. So without wasting …
Joining two tables is easy, but have you ever tried joining more than two tables? It’s a little bit tricky, right? When you try to join multiple tables, everything gets messed up, even if it looked easy. If you are a new programmer and not clear with the MySQL JOIN concepts, you will always get …
If you have learned about the WITH CHECK OPTION clause for the views, then you must learn and understand the LOCAL and CASCADED options as well. These two options in the WITH CHECK OPTION clause are a little bit confusing and difficult to understand, but we will make it a lot easier. Prior knowledge of …
The new learners or even some intermediate SQL users think the window functions and the aggregate functions or a GROUP BY clause are the same, but it’s not. Even if they look very similar, there is a small difference between them. In this tutorial, we will see the difference between the window functions and the …
Window functions in mysql are a little bit confusing and without trying them in the real-time examples, they are even more confusing! The RANK, DENSE_RANK and ROW_NUMBER functions are used to return the row numbers in the table; however, they all work totally differently. In this tutorial, we will see the overview of all functions …
In this tutorial, we will see detailed information about the LOCAL in the WITH CHECK OPTION clause. To understand the LOCAL concept, you must possess knowledge of the WITH CHECK OPTION clause. If you are not aware of the WITH CHECK OPTION clause, you can read and learn it here. Now, without further ado, let’s …
The words unique and distinct are used often used interchangeably in our daily life. But when it comes to SQL, it plays totally different roles. In this tutorial, we will see the difference between the UNIQUE and DISTINCT clauses in MySQL with some examples. So, let’s get started! Introduction Unique and distinct are synonyms for …
MySQL “Window Functions” is one of the important parts that many candidates skip and don’t prepare while appearing for interviews. It is a relatively simple topic if you understand it with simple explanations and examples. In this article, we will see some important and commonly asked interview questions on the window functions topic. So, let’s …
Preparing for SQL questions before any tech interview is as important as preparing for data structures and algorithms. For any tech role, such as software development engineer, data scientist, database administrator, etc, SQL is an important topic to be prepared with. There are multiple topics in MySQL that are important. The JOINs are supposed to …