Learn SQL articles

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> A view in Structured Query Language (SQL) is essentially a virtual table that is based on the result-set of an SQL statement. In other words, it is a saved query that you can treat as a standalone table. Views are particularly […]

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In the world of Structured Query Language (SQL), two concepts that tend to appear quite often are ‘normalization’ and ‘denormalization’. These are database design techniques that deal with how we store data in a relational database. Let’s delve into what each

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Stored procedures in SQL are pre-compiled and reusable groups of SQL statements that are named and stored in a database. They offer various advantages such as improving performance by reducing the amount of information sent to a server, preventing SQL injection

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Subqueries, in SQL, are a powerful and essential tool, used within the main SQL queries to form sophisticated queries and to deal with complex data and database structures. They are inner queries nested in a main, or outer query which may

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Introduction In SQL, indexes are used to retrieve data from the database more quickly. They work similarly to an index in a book and are an essential part of any database structure. There are two main types of indexes: clustered and

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> As an SQL programmer, understanding the differences between the CHAR and VARCHAR data types is crucial to your data manipulation and storage strategies. Both these data types are used to store character data, but their behavior and characteristics vary significantly and

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In Sql Server, DATEPART is a built-in function that allows us to extract the specific part of a date, such as the year, month, day, hour, minute, and even up to the nanosecond. This function is extremely helpful when it comes

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In the seemingly infinite world of Structured Query Language (SQL), one keyword that often brings confusion, especially among beginners is the DISTINCT keyword. This post aims to demystify this keyword, providing you with all the knowledge you need to use it

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> The SQL EXISTS operator is a boolean operator that is used in a WHERE or HAVING clause to test whether a subquery returns any record. In simpler words, it helps us to check if our subquery has any output or not.

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In the world of SQL, JOIN operation is a technique that combines rows from two or more tables based on a related column. The most commonly used joins in SQL are INNER JOIN and LEFT JOIN. Understanding how they work and