Learn SQL articles

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 >> 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 >> 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 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 >> SQL, or Structured Query Language, is a standardized programming language that is used for managing and manipulating relational databases. Among its many functions, the CONCAT function stands out as a particularly useful tool. But what exactly does the CONCAT function do

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> The CONCAT_WS function in SQL is designed to consolidate several expressions or strings into a single value, with each one separated by a specified separator. CONCAT_WS is an abbreviation for ‘Concatenate With Separator’. This function is highly useful in SQL and

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> SQL (Structured Query Language) is a highly versatile language used in the world of databases for manipulating and retrieving data. Among the various operations that SQL provides, JOIN operations are some of the essential features, helping us retrieve data from two

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.