What is the difference between enum and set in MySQL?

What is the difference between enum and set in MySQL?

Difference between SET and ENUM. The difference between SET and ENUM is that SET column can contain multiple values and whereas an ENUM can hold only one of the possible values. The SET type is similar to ENUM whereas the SET type is stored as a full value rather than an index of a value as with ENUM.

What is enum in MySQL?

An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time.

Does MySQL have enums?

In MySQL, an ENUM is a string object whose value is chosen from a list of permitted values defined at the time of column creation. The ENUM data type provides the following advantages: Compact data storage. MySQL ENUM uses numeric indexes (1, 2, 3, …) to represents string values.

Can two enum values be the same?

Two enum names can have same value. For example, in the following C program both ‘Failed’ and ‘Freezed’ have same value 0. 2. If we do not explicitly assign values to enum names, the compiler by default assigns values starting from 0.

What is the difference between varchar and char in MySQL?

A CHAR field is a fixed length, and VARCHAR is a variable length field. This means that the storage requirements are different – a CHAR always takes the same amount of space regardless of what you store, whereas the storage requirements for a VARCHAR vary depending on the specific string stored.

How define SET in MySQL?

A SET is a string object that can have zero or more values, each of which must be chosen from a list of permitted values specified when the table is created. SET column values that consist of multiple set members are specified with members separated by commas ( , ).

Should enum be stored in database?

By keeping the enum in your database, and adding a foreign key on the table that contains an enum value you ensure that no code ever enters incorrect values for that column. This helps your data integrity and is the most obvious reason IMO you should have tables for enums.

Can we have enum containing enum with same constant?

The values assigned to the enum names must be integral constant, i.e., it should not be of other types such string, float, etc. All the enum names must be unique in their scope, i.e., if we define two enum having same scope, then these two enums should have different enum names otherwise compiler will throw an error.

Is enum same as int?

In C, each enumeration constant has type int and each enumeration type is compatible with some integer type. The C standard grants the freedom to use different integer types to represent different enumeration types, but most compilers just use int to represent all enumeration types.

What is the difference between CHAR and VARCHAR?

The basic difference between Char and Varchar is that: char stores only fixed-length character string data types whereas varchar stores variable-length string where an upper limit of length is specified.

What is the difference between CHAR & VARCHAR data types in SQL give an 2 example for each?

Difference between CHAR and VARCHAR datatypes 2. In CHAR, If the length of string is less than set or fixed length then it is padded with extra memory space. In VARCHAR, If the length of string is less than set or fixed length then it will store as it is without padded with extra memory spaces.

What is an enum in MySQL?

An ENUM is a string object whose value is decided from a set of permitted literals (Values) that are explicitly defined at the time of column creation. Attention reader!

What is the default enum data type in SQL?

By default, the ENUM data type is NULL, if the user doesn’t want to pass any value to it. Suppose, we want to store the student data in the table Student_grade in order to store the grades of students in the corresponding columns (High, Medium, Low).

How to assign the priority to the enum column in MySQL?

We use the priority statement to assign the priority to the Enum column. The prioritized column will accept only three columns. Here, the order of numbering Low->1, Medium->2, High->3. Insert a new row into the table named Student_grade, the statement is as follows –

What is Anan enum in SQL Server?

An ENUM is a string object whose value is decided from a set of permitted literals (Values) that are explicitly defined at the time of column creation. Attention reader! Don’t stop learning now. Learn SQL for interviews using SQL Course by GeeksforGeeks. Succinct data storage required to store data in limited size columns.