When I was learning PostgreSQL, I encountered a situation to handle NULL values. At that time I assumed NULL was equal to zero or blank...

What is Subquery:   Subquery in SQL is a query within a query. It’s asking a smaller question inside a bigger question. At times, to get...

When you are first learning SQL, it can be like trying to find one's way through a maze, what comes after the other, GROUP BY or HAVING?...

Welcome back to the SQL series! We now dive into a critical feature in SQL databases— Views . Views offer an abstraction over database...

Stored procedures in PostgreSQL provide a powerful way to encapsulate complex logic, manage transactions, and handle data efficiently. In...

In the previous blog, we learned about SQL triggers and discussed DML triggers  in detail, covering all the combinations of BEFORE and...

Indexes are vital components in SQL databases, enabling faster data retrieval and improving query performance. This blog explores what...

In the world of databases, SQL (Structured Query Language) is essential for performing various operations that allow users to manage...

In the realm of data management, databases serve as structured collections of information. They enable the storage, retrieval, and...

Optimizing PostgreSQL Queries: Techniques and Examples PostgreSQL is a powerful and versatile relational database system, but the...

Mastering Excel Data Cleaning is an essential skill needed in most fields and industries today. In a data-driven world, maintaining high...

Structured Query Language or SQL One of the most popular and easy-to-learn tools for data analysis is SQL. It let us retrieve , filter ,...

A window aggregate function is an easy way to perform an aggregate calculation without changing the query to an aggregate query. This...

SQL (Structured Query Language) is the core of relational database systems that helps in handling of data. JOIN statement is used to...

In this blog, we will see about CTEs in PostgreSQL. What is CTE? The Common Table Expressions (CTE) were introduced into standard SQL in...

Analytic Functions Analytic Functions help while working with complex data sets. So it is important to understand it correctly. Also, it...

Most of us struggle with operating date and time in PostgreSQL. But you know what, PostgreSQL has many built in date functions which can...

Learn or Review the concepts of SQL Joins

Joins Joins in the data world means combining two tables horizontally. Join functions/queries help us to consolidate two separate tables...

POSTGRESQL Functions and Procedures A procedure is a database object similar to a function. The key differences are: Procedures are...