What is the MySQL ENUM data type? What are the advantages of using the ENUM data type?

#The ENUM data type differs from the standard data type in that it is an enumerated list containing 1 to 65,535 strings that represent the allowed values ​​of the field. When you define an ENUM, you are creating a list of items from which a value must be selected (or can be NULL).

For example, if you want a field to contain "A" or "B" or "C", you can define ENUM as ENUM('A', 'B', 'C') with only these values ​​( or NULL) to populate this field.

Perhaps the following are some advantages of the ENUM data type:

• Compact data storage can be observed in situations where a column has a limited set of possible values.
• The specified string as the input value is automatically encoded as a number.
• Numbers are converted back to corresponding strings in query results.
• By using ENUM, we can get readable queries and output.

The above is the detailed content of What is the MySQL ENUM data type? What are the advantages of using the ENUM data type?. For more information, please follow other related articles on the PHP Chinese website!