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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 >> The COALESCE function in SQL plays an indispensable role when it comes to data manipulation and analysis. Its primary purpose is to return the first non-null expression among its arguments. When performing data analysis, it’s common to encounter null values in

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In the world of SQL programming, handling NULL values gracefully is crucial for building reliable, bug-free applications. Two key functions that the SQL language provides us to deal with NULLs are COALESCE and NULLIF. COALESCE function The COALESCE function is a

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> The purpose of the CAST and CONVERT functions in SQL is to allow data of one type to be displayed or used as another type. This type of operation is also usually referred to as a “type casting” or “type conversion”.

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> The SQL CASE statement is a conditional construct that allows for decision making in SQL queries. In other words, the CASE statement allows you to write if-then-else kind of logic in your SQL. Through this post, we’ll delve deeper into its

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

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 >> 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 >> 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