SQL

This post focuses on an extremely handy operator, SQL BETWEEN, which is often overlooked yet can immensely optimize your querying process. What is SQL BETWEEN? The SQL BETWEEN operator is used in a WHERE clause to select a range of data between two values. This operation is inclusive, meaning the end values are part of …

SQL BETWEEN – A Comprehensive Guide Understanding the SQL BETWEEN Operator Read More »

Let’s get a handle on one of its powerful operators, the SQL IN operator. I’m going to keep this as simple as possible, while still covering everything you need to know. What is the SQL “IN” Operator? In SQL, the IN operator allows you to specify multiple values in a WHERE clause. Essentially, it’s a …

SQL IN – SQL IN with Practical Examples Read More »

You’re going to delve into an essential yet often overlooked operator in the SQL toolkit – the ‘LIKE’ operator What Is the SQL ‘LIKE’ Operator? The ‘LIKE’ operator in SQL is a logical operator that you can use in the WHERE clause to search for specific patterns in a column. This operator becomes particularly useful …

SQL LIKE – Simplified Guide to understanding the SQL ‘LIKE’ Operator Read More »

Let’s delve into the wonderful world of SQL (Structured Query Language), focusing on three pivotal functions: COUNT, AVG, and SUM. If you’re managing databases, these functions are crucial for data analysis and manipulation. But don’t worry if you’re a beginner; we’ll guide you through with easy-to-understand examples and sample data. Before we begin, let’s set …

SQL Count(), Avg(), Sum() – Unraveling SQL Aggregation Functions Count(), Avg(), Sum() Read More »

Let’s dive into the world of SQL (Structured Query Language) to explore two incredibly valuable aggregate functions: MIN() and MAX(). These functions allow you to discover the smallest and largest values in a particular column of your data set, respectively. Understanding and properly leveraging these functions can be a game-changer when dealing with massive datasets …

SQL MIN and MAX Functions – Unleashing Your Data’s Extremes Read More »

SELECT TOP is an essential clause for developers and database administrators, allowing for the efficient and strategic handling of voluminous data. Understanding SELECT TOP The SELECT TOP clause is a SQL command used to limit the number of rows returned from a query. This is particularly useful when you’re dealing with large databases, and you …

SQL SELECT TOP – Diving Deep into the ‘SELECT TOP’ Clause Read More »

The SQL DELETE statement is a powerful command that allows you to remove rows from a table in a relational database. This command can be used to delete a single record, multiple records, or all records from a table. The key thing to note here is that DELETE removes entire rows of data, not individual …

SQL DELETE – A Detailed Overview Read More »

Let’s dive deep into one of the most commonly used SQL commands – UPDATE. The UPDATE statement is used to modify existing records in a table and is a crucial part of database management and maintenance. SQL UPDATE Syntax The basic syntax for the SQL UPDATE command is as follows UPDATE table_name SET column1 = …

SQL Update – Mastering SQL Update with Examples Read More »

Let’s explore an important, yet often misunderstood concept in SQL: NULL values. We’ll also include hands-on examples with a sample dataset. What is Null in SQL? NULL in SQL represents missing or unknown values. It is not zero, not an empty string, or not any other default value. It’s simply a representation of ‘no data’. …

SQL Null Values – Understanding SQL Null Values with Detailed Examples Read More »

In the realm of SQL, learning how to insert data into tables is a fundamental skill for anyone aspiring to manipulate databases effectively. The SQL INSERT INTO statement is the command you need for this task, allowing you to add new rows of data into a table. Let’s delve deeper into this key statement with …

SQL INSERT INTO – A Comprehensive Guide to master SQL INSERT INTO Statement Read More »

If you have spent some time playing with databases, you will undoubtedly have come across the SQL ORDER BY clause. It’s one of the essential tools in a data engineer’s toolbox, and understanding it is key to being able to manipulate and analyze your data effectively. What is the SQL ORDER BY Clause? The SQL …

SQL ORDER BY – Unraveling SQL’s ORDER BY Clause Read More »

The logical operators AND, OR, and NOT are the most fundamental tools in our SQL toolkit. Operators AND, OR, and NOT are incredibly useful in refining our queries to extract the precise information you need from our databases. Without further ado, let’s dive right into it. SQL Logical Operators SQL logical operators offer a way …

SQL AND, OR, and NOT – A Deep Dive into the AND, OR, and NOT Operators Read More »

Let’s dive into the heart of SQL (Structured Query Language) with a detailed look at the SQL WHERE clause. You will explore its syntax, usage, and some real-life examples to give you a robust understanding of this essential command. What is the SQL WHERE Clause? Let’s start at the very beginning. SQL is a standard …

SQL WHERE Clause – A Comprehensive Guide Read More »