PostgreSQL plays a very important role if you want to manage data and majorly when you want to manipulate the data according to your requirements. It provides a large variety of statements, functions and JOINs to reduce the complicated structure of the different models. Have you ever heard of VIEW in PostgreSQL? VIEW allows users …
PostgreSQL Standard View vs Materialized View (with Syntax and Example) Read More »
While writing SQL queries, there’s a good chance that you must have encountered the WHERE 1=1 statement in a SELECT query. When we look at it for once, it may seem redundant and unnecessary because isn’t it obvious that one is equal to one? What is the need to include a seemingly true statement in …
You must encounter many occasions in your daily life where you must count on things, and counting things is rather simple, right? However, what would happen if you wanted to count something that’s not even there? That’s when the exciting part starts. When you are using the COUNT() method in databases, there are situations in …
A lot of SQL programming involves doing things again and using specific methods again and over. These recurrent techniques are known as “SQL patterns,” and knowing more about them is essential for database management. SQL developers frequently encounter scenarios where matching Null values becomes imperative. In this tutorial, we will learn the significance of matching …
Matching Nulls by Masking Nulls: A Detailed Guide Read More »
Imagine that you have a bunch of files which contain information about the customers, their orders and the products they have bought. Views help us to see that data in a way that’s easier to understand and use. In this tutorial, we will learn about simple and complex views with the help of practical examples. …
Difference Between Simple and Complex View in SQL Read More »
Indexes play a vital role when it comes to the SQL server. While writing SQL queries if you want to increase the performance and data retrieval timing, an index can play a crucial role in that. To understand better, let’s take a dictionary as an example, it has an index and with the help of …
Difference Between Clustered and Non-Clustered Index Read More »
If you have been writing SQL queries for longer, you must know the significance of GROUP BY and NULL values and how they contribute the most while managing and manipulating data values. NULL values represent the absence of a value or an unknown value in a database column, while the GROUP BY clause is used …
While dealing with a vast amount of data, there’s often a need to fetch the top value of the database, and going through the entire dataset for this procedure can be time-consuming. That’s where MySQL LIMIT and BETWEEN come into the picture. It allows users to extract the cream of the crop without sifting through …
Aggregate window functions allow users to efficiently generate output such as comparing specific rows output to average across all rows or calculating cumulative sum by applying the aggregate result to every row of the data. This often helps developers to make their models efficient. In this tutorial, we will learn about the multiple aggregate function …
PostgreSQL Aggregate Functions: A Detailed Guide Read More »
If you have writing queries in PostgreSQL for longer, and you want to select data based on specific conditions in PostgreSQL, you can use the CASE statement within your SELECT query to perform conditional selection based on specific criteria. In this tutorial, you will learn about the CASE statement in PostgreSQL and explore how it …
PostgreSQL Conditional Select With CASE Statements Read More »