learn sql

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 >> A trigger in Structured Query Language (SQL) is a special kind of stored procedure that automatically runs or fires when an event happens in the database. Triggers are mainly used to maintain the integrity of the data in the database. They

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 >> 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 >> 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 >> 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

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> If you have spent any time writing SQL queries, chances are high you have encountered the ALL and ANY keywords. These SQL keywords are used with comparison operator to filter data in your queries. The ALL Keyword The ‘ALL’ keyword in

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Retrieving data from databases is an essential part of database management and no language makes this task more seamless than SQL (Structured Query Language). Among the variety of functions it offers to refine our searches, the BETWEEN operator holds significant importance.

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In SQL language, a CASE expression is a conditional statement that allows you to add if-then logic to your SQL queries. CASE expressions provide a way to make decisions and generate different outputs based on those decisions. This increases the overall