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In this tutorial, we aim to explore how to use IF ELSE the statement in MySQL. One of the key roles of a data analyst is to gather insights from the data and produce meaningful results. It can be done with the help of several data filtering...

This tutorial article will introduce two CSV methods to import data from a comma separated value ( ) file into a MySQL database and insert it into a table. We will look at different ways to import CSV files into MySQL. This task can be done...

MySQL provides a variety of convenient data types for storing expected input into its database. Knowing the correct data type to use to store special data is key to ensuring an optimized and efficient database. This tutorial explains the fo...

This tutorial aims to understand how to shuffle or sort the values ​​or records of a table in MySQL. Most businesses and organizations that use MySQL for data analysis or visualization need to sort different table values ​​of their...

We will learn about different ways to copy data from one database to another. This strategy of replicating data 数据复制 is very useful in . Due to data replication, data can be served to different servers and made available to all user...

In this tutorial, we aim to explore how to set NULL the value in MySQL. If there is no value, then the specific table field in MySQL has to be updated NULL . This NULL value addition helps in data storage, accessibility, and analysis. You m...

This tutorial explains the refresh permissions operation and its implementation with examples. Implementing refresh permissions in MySQL MySQL implements user management through grant tables to ensure security and access control in the serv...

This tutorial shows you how to reset the auto increment in a MySQL table. Most businesses and organizations using MySQL need to insert values ​​into multiple tables simultaneously. While it is not possible to make all fields of the inse...

In this article, we will introduce MySQL comments. We will also understand what type of comments should be used and where. Comments are written to describe the code and make it easier to understand. We also use comments to ignore a part of...

Today's tutorial is an introduction to MySQL composite keys. This lesson also discusses the use of the CREATE and ALTER statements to create composite primary and foreign keys. Introduction to MySQL composite keys A composite key is a type...

Today, we will learn 等待表元数据锁定 . This article focuses on the causes of metadata lock waits and provides solutions. What are locks in MySQL? A lock is a mechanism associated with a table to restrict unauthorized access to the...

In some cases, users want to capture the operations in an output file or some local storage. The storage can be a CSV file or a notepad where the contents of the SQL can be placed. outfile This file is generated using the MySQL command. Thi...

This tutorial will guide you through creating a MySQL EVENT timer, also known as a MySQL timer. We will see how to set a timer in MySQL to let MySQL manipulate the data (eg. UPDATE // data) INSERT . DELETE It will also take a backup (if req...

Traditional SQL INSERT statements do not perform input validation of their parameters/values ​​against existing database tables, which sometimes results in errors when duplicate keys are found during the insert process. This is handled...

This tutorial aims to understand unsigned in MySQL. unsigned Using keywords in MySQL Businesses and organizations have to assign data type as unsigned for certain columns. However, it is important to understand when and where to use this da...