In this tutorial, we will study how to compare successive rows within the same table in MySQL. Here we will use Self Join and Inner join to compare successive rows within the same table. SELF JOIN A table can be joined to itself using a join called a SELF JOIN. The self-join is frequently used …
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In this tutorial, we will learn a very interesting window function- the NTILE() function. The NTILE() function is similar to the ROW_NUMBER function. Read the tutorial carefully and make your hands dirty by writing the code, so that you will understand everything about the NTILE() function. So, let’s get started! Also read: Introduction to Mysql …
In this tutorial, we will see what is the RANK() function, how it works, how to use it and what is the difference between the RANK() function and the dense_rank() function. So, let’s get started! Introduction to MySQL RANK() Function The RANK() function is similar to the DENSE_RANK() function but works slightly different. Instead of …
In this tutorial, we will study how to call stored procedures in the MySQL database server from the Nodejs application. Stored Procedures An SQL-prepared code that may be saved and reused repeatedly is known as a stored procedure. So, if you frequently develop SQL queries, save them as stored procedures and just call them to …
In this tutorial, we will study how to delete data in MySQL using the Nodejs application. Deleting MySQL records using Nodejs To delete a record from the MySQL database server using the Nodejs application, the DELETE FROM statement will be used. For this, we will write a javascript code. Here table is info in the …
MySQL LEAD function is very similar to the LAG function. We can think of the LEAD function as contradictory to the LAG funtion. In this tutorial, we will see everything about the LEAD function. We will start with the introduction and then proceed to the syntax and example to implement the LEAD function. Read: MySQL …
In this tutorial, we will learn how to implement the MySQL TIMESTAMPDIFF function which will calculate the difference between two DATE or DATETIME values. Also read: MySQL Timestamp – Definition and Usage Introduction TIMESTAMPDIFF() in MySQL returns a value after dividing one DateTime expression by another.The two expressions don’t have to be of the same …
MySQL LEAD and LAG functions are one of the most crucial window functions that are used to implement complex queries. In this tutorial, we will learn about the LAG function. We will understand what a LAG function is, why we need it and how to implement it. So, let’s get started! Also read: Introduction to …
In this tutorial we’ll learn to use a MySQL Timestamp, we’ll see the syntax, how to initialize a timestamp, auto-initialization, manually inserting the timestamp into a table, and so on. Also check: MySQL UTC_TIME(), UTC_DATE() and UTC_TIMESTAMP() functions Introduction MySQL Timestamp is a data type for date and time format. It is used when we …
In this tutorial, we will learn what a MySQL window function is and the different types of window functions. This is an introductory article on window functions where you will learn what is it, why they exist, what are the uses of these window functions and how to use them. Also read: MySQL Stored Function …