Overall, if used correctly, enums can be a valuable tool when working with string data in MySQL. However, it's also important to keep in mind the limitations and potential drawbacks of using enums, such as the need to alter the schema if allowable values change. With a predefined list of allowable values for a column, the benefits of enums are clear. ConclusionĮnums in MySQL are a powerful feature that can simplify database design, increase security, and improve readability. If you must use integer enums, it's best to use a TINYINT column instead. Using integer enumsįinally, it's important to note that integer enums can be confusing and should be avoided if possible. While this can be useful in some cases, it can also be quite confusing, especially if you're not expecting it. When sorting data using enums, MySQL sorts by the underlying integer value rather than the actual string. While this process is not difficult, it can be inconvenient. If a business requirement changes, and you need to add another option to the allowable values, you'll have to alter the schema of your table to add a new enum. While enums offer several benefits, there are some downsides to using them, including: Changes to the schema This feature makes them ideal for databases with large amounts of data. Compact data typeĮnums are compact data types, which means they take up less storage space than other data types, such as strings. You don't need to memorize integers to understand the data the values make sense in plain English. Since enums allow you to store readable values in your database, it's easier to read the stored data at a glance. When attempting to enter an invalid value, an error is thrown, preventing the data from being inserted into the database. ENUM and SET Constraints 1.6.3. Using enums in MySQL has several benefits, including: Data validationĪs mentioned earlier, enums offer data validation, which helps to ensure that only valid data is entered into a column. version 8.0 MySQL 8.0 Reference Manual /.
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