We have gone through some of the disadvantages of using MySQL UUID over AUTO_INCREMENT PRIMARY KEY. Using MySQL UUID might cause unwanted performance issues because of its size and complexity.For example, it is much easier to see '7' as an ID value than to see 739bcb2d-8b63-12ec-9c44-8c19450c827b. Another downside of using MySQL UUID is that it makes it difficult to read or debug your code.It uses 8 bytes of space as compared to 4 bytes occupied by an integer. One of the biggest disadvantages of using MySQL UUID is that it occupies more space in the memory.Now, we will move ahead and see some of the disadvantages of the MySQL UUID() function. With MySQL UUID, you can generate the ID for the parent table and add data in both the parent and child table simultaneously. In that case, you'll add the data in the parent table, get the generated ID and then insert the data in the child table corresponding to that ID. Let us assume you want to add a row of data in both the parent and child tables. Using MySQL UUID also makes certain tasks easier.MySQL UUID's ability to be generated offline makes it much more convenient to use as it eliminates the need to involve the server every time you want to generate a unique value.We can use MySQL UUID values inside the URL too. ![]() ![]() Security is another great feature of MySQL UUID, as it does not provide any info about our data which in turn protects it from hackers and intruders looking to misuse it.This feature of MySQL UUID allows us to merge tables and datasets from different servers without any worry of repeating values. MySQL UUID not only creates unique values across the table but also across different databases and servers.In this section, we are going to see the advantages as well as disadvantages of using MySQL UUID() over AUTO_INCREMENT PRIMARY KEY. So, one can be seen as a replacement or alternative to the other. We can generate unique values in a table using the AUTO_INCREMENT PRIMARY KEY and the same can be achieved using the UUID() function.
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