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In this article, we will learn how to delete single or multiple columns present in MySQL. If the column exists in MySQL, then delete the column In a table, a column is a row of cells that can contain text, numbers, and graphics. For each ro...

Sometimes we need to insert data in our database that is mostly similar to another row. In MySQL, there is a simple trick by which you can easily create duplicate rows. In this article, we will learn how to create a copy of a row in the sam...

In this article, we will learn about MySQL IDENTITY column. IDENTITY columns in MySQL While creating a table, we may not have a unique identifier in the database, which makes choosing a primary key challenging. To solve such a problem, we h...

This article will explore the methods of specifying unique constraints for multiple columns in MySQL. Specifying unique constraints for multiple columns in MySQL You may sometimes want to guarantee that every value in a column or set of col...

In MySQL or any programming language, there are privileges to add constraints or checks in the instance of creating a table. These constraints help the user to restrict the values ​​inserted into specific fields of the table. The restri...

This article describes how to use SQL query to obtain the data records of the last 30 days from the database. Import data into the database First, let's import some sample data into the database using SQL query. Before we import the dataset...

This article shows you how to add dates and times in MySQL using DATE_ADD() the _date_time_s() function. We will learn how to add or subtract days, years, months, and times individually, as well as how to combine the two (for example, days...

In this article, we will learn to use CONCAT() the and CONCAT_WS() functions to concatenate or append string values ​​in MySQL fields. Use CONCAT() and CONCAT_WS() to append a string to an existing field in MySQL To understand CONCAT()...

Loops are the most fundamental part of full stack development. Loops are very useful when we need to perform similar tasks again and again under certain conditions. In this article, we will see how to use while loop in MySQL, and we will al...

This article describes how to simulate a foreach loop in MySQL using INSERT, SELECT, WHERE, and JOIN in one statement. MySQL foreach loop To understand foreach loop simulation, let us create three tables with the following names and attribu...

This article focuses on the various queries that can be used to display the current database in MySQL. We will learn by using the Windows command line and MySQL Workbench. Display the current database in MySQL We can use the following query...

Today, we will explore three scenarios and their solutions where we want to select the first row from a MySQL table. In the first scenario, we will learn to get the first row from a MySQL table where there are multiple instances of a partic...

Today, we will learn about queries in MySQL that can display the table and database structure. We will use the mysqldump utility, DESCRIBE the , SHOW TABLES and SHOW CREATE TABLE the statements. We are using MySQL version 8.0.28 while writi...

Keywords in any programming language such as C, C++, Java, and MySQL are useful; they are called reserved words. These reserved words have meanings and functions. When these keywords are used in a statement, they operate according to their...

In this article we will understand the uses, advantages and alternatives of ZEROFILL attribute in MySQL. Use and benefits of the ZEROFILL attribute in MySQL The benefit of using the ZEROFILL attribute is that it has nothing to do with input...