1. Introduction When handling databases, processing NULL values is a very important point. In particular, those accustomed to Oracle’s NVL function often notice that NVL cannot be used when migr […]
1. Introduction Have you ever thought, while designing or operating MySQL tables, that you wanted to change the data type of a column later? For example, a column that you initially thought was suffic […]
1. Introduction When managing a database in MySQL, you’ll frequently encounter situations such as “data that you want to handle as numbers is stored as string type” or “you can […]
Introduction If you’re using MySQL, you’ll often encounter scenarios where you need to “replace specific strings in a table all at once” or “batch correct incorrect data. […]
1. Introduction MySQL is a relational database management system widely used around the world, but among its features, techniques for ensuring ‘data integrity’ and preventing ‘confli […]
1. Introduction Can’t Handle Japanese Well in MySQL? A Thorough Explanation of the Causes and Solutions Have you ever experienced issues like “garbled characters” or “???” […]
1. Introduction Challenges in Searching Comma-Separated Data in MySQL When working with databases, you may encounter cases where multiple values are stored in a single column, separated by commas. For […]
1. Introduction: Common Cases Where FIND_IN_SET is Needed When handling data in MySQL, you may encounter cases where “multiple values are saved in a single column, separated by commas.” Fo […]
1. Introduction Why Create a Schema in MySQL? When handling databases in MySQL, many of you have probably come across the phrase “create a schema.” A schema represents the structure or blu […]
1. Introduction Are You Properly Managing MySQL Users? When using MySQL, it’s common for user accounts created temporarily for development or testing to remain undeleted. “This user, I don […]
