Learn SQL articles

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In SQL, we use the ORDER BY keyword to sort the data in ascending or descending order, based upon any column or columns. By default, the sorting is done in ascending order. If you want to sort the results in descending […]

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Updating records in SQL databases is a common task. It can be done easily using the UPDATE statement, which is a part of the SQL standard. Before we go into examples, it’s important to understand the syntax for the UPDATE statement.

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> SQL or Structured Query Language is a powerful tool used to communicate and manipulate databases. In today’s data-driven world, understanding how to use SQL to extract useful information from raw data stored in databases is critically important. One commonly used operation

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Calculating the difference between two timestamps in SQL can be a critical operation when it comes to date or time-based analysis. The difference can provide useful insights on time durations, which are commonly used in areas like project planning, task scheduling,

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> SQL or Structured Query Language is a powerful tool for managing and analyzing large volumes of data. One commonly needed task is to calculate the median value from a list of numbers. Unlike the mean (average), which can be skewed by

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> If you have been working with databases, you often find yourself in a situation where you need to make sure that a specific column exists in a table before performing an operation on it. SQL – Structured Query Language, used for

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Implementing pagination in SQL Server is a common task for developers. With paginated results, your applications are more efficient and user-friendly. If you have large tables, it’s not advisable to fetch all rows at once given it can result in performance

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> The ability to manipulate and calculate dates is a vital part of data analysis and manipulation in SQL. It enables developers to perform a wide range of calculations, including age calculation, time span between two dates, grouping records by specific date

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In the world of SQL, data types are fundamental. Different columns in SQL tables can store varying data types including integers, strings, or date/time values. The ability to convert values from one data type to another is essential in analyzing data

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> If you’ve been working with modern web applications, chances are that you’re familiar with JSON (JavaScript Object Notation), a popular data format for transferring data between a server and a client. Although JSON is closely associated with JavaScript, its simplicity, compactness,