In this SQL tutorial, we will learn the basics and advanced concepts of SQL SERVER, such as how to use the SQL language to create, store, retrieve and manipulate data in the SQL server database.
If you are new to SQL Server, you might wonder what an index is and why it’s important. Indexes are crucial for improving query performance and are essential for efficient data retrieval.
In this article, we will discuss the differences between clustered and non-clustered indexes in SQL Server.
Database normalization is a technique used to organize data in a relational database. It involves breaking down a large table into smaller tables and defining relationships between them. The normalization goal is to eliminate redundant data and ensure that each piece of information is stored in only one place.
Relational databases are the backbone of many software systems. They allow us to store, manage, and retrieve data in an organized and efficient way. However, as the size and complexity of our data grow, so do the challenges of maintaining its integrity and consistency. This is where database normalization comes in.
Customer relationship management (CRM) is a important aspect of running a successful business, and a CRM database is one of the most important tools for achieving that success.
As businesses grow, the volume of data they need to manage will also grow. With customers interacting with businesses through multiple channels, keeping track of all the information can be challenging. This is where a CRM database comes into play.
A CRM database is a software that helps companies manage customer data by collecting, storing, and analyzing information from various sources, such as social media, website interactions, and customer service interactions.
SQL (Structured Query Language) is the standard language for managing relational databases. It is a powerful tool that allows us to store, manipulate, and retrieve data efficiently. One of the most commonly used operations in SQL is the JOIN operation, which allows us to combine data from two or more tables into a single result set.
The INNER JOIN clause is one of the most frequently used types of JOIN in SQL. It combines rows from two or more tables based on a related column between them. The INNER JOIN returns only the rows that have matching values in both tables, i.e., the intersection of the two tables.
The following picture illustrates the Venn diagram of INNER JOIN. The shaded area in the diagram represents the common values shared between the two tables.
The SQL UPDATE statement is a powerful command that allows you to modify the existing data in a SQL Server table.
This post will cover everything you need to know about the SQL UPDATE statement, including its syntax, parameters, and examples.
SQL Exists is a conditional operator that checks the existence of rows in a subquery. It returns true if the subquery returns at least one row and false if it returns no rows.
SQL Exists is often used in conjunction with other conditional operators such as WHERE, HAVING, and SELECT.
In this article, we will explore the basics of SQL Exists and show you how to use it in your queries. We will also use some examples and best practices for working with SQL Exists.
The LIKE operator in SQL is used to filter data based on a specified pattern. The pattern can be a string of characters that contain wildcards.
The LIKE operator returns all rows where the selected pattern matches a portion of the data in the column.
In this article, we will discuss the LIKE operator in SQL, its syntax, parameters, and examples of how to use it in SQL Server.
The COALESCE function in SQL returns the first non-null value among a set of arguments. This function takes one or more arguments and returns the first non-null value.
As a SQL Server developer, you may encounter situations where you must convert data types from one form to another. The SQL Server CONVERT function can help you achieve this task by changing the data type of an expression to another data type.
This article will cover everything you need to know about the SQL Server CONVERT function. I’ll explain the function and how to use it and provide code examples in SQL Server. We’ll also compare the CONVERT function to similar functions in SQL Server, like CAST, FORMAT, and PARSE.
If you’re working with SQL Server, you may have come across the concept of stored procedures. A stored procedure is a precompiled set of SQL statements that we can save in the database for later use. Once it is created, we can execute it multiple times without recompiling the code.
This article aims to cover everything you need to know about stored procedures in SQL Server, including benefits, creation, modification, and exception handling.
