Learn SQL articles

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In SQL, NULL represents missing or unknown data. There will be scenarios where we want to replace these NULL values with some default value or any other value that makes sense according to the business context. The SQL COALESCE() function or […]

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In SQL programming, it is quite a common task to check if a certain table exists within a database. There are many cases where you would need to carry out such an operation. For instance, before interacting with a table (i.e.,

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> One of the tasks you will frequently come across when dealing with databases is manipulating and combining different data types. In SQL, combining string values is referred to as “Concatenation”. Concatenation is a process of joining two or more strings into

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In SQL, several situations may necessitate the conversion of a string into a date. This conversion is necessary whenever we deal with dates because the database stores them as a string. SQL possesses a built-in function, the CONVERT() function, which we

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> So, you have dabbled with SQL and need to convert data types for your needs. SQL, Structured Query Language, has built-in functions that allow you to do this quickly and efficiently. Let’s dive into this! Understanding SQL Data Types Before we

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In Structured Query Language (SQL), one of the basic tasks is creating a new table for your database. Whether you’re designing a new system from scratch or simply adding data for a specific function, understanding the command to create a new

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> In this blog post, you will be taken through the process of deleting a record from a table in SQL. SQL, which stands for Structured Query Language, provides a variety of commands to manipulate data stored in a database. One such

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> Often while working with SQL, you might find scenarios where it’s necessary to delete a table from your database. SQL provides a very clear and straightforward way to do just this. However, a word of caution here, the DROP TABLE command

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> w do I count the number of records in a table in SQL? In this blog, we’ll explain how to easily count the number of records in a SQL table. If you’re new to SQL, don’t worry — we’ll walk you

For an instructor lead, in-depth look at learning SQL click below. Learn SQL >> SQL is a powerful language that is widely used for manipulating and retrieving data from databases. One of the common tasks you might need to do is to retrieve records from a table in a random order. For this, we can