The first example returns the 1st indexed field ('2' has an index value of 1, as it's defined first), while the second example returns the string value '1'. It's easy to get confused between returning the enum integer with the stored value, so we don't suggest using ENUM to store numerals. Sorting is according to the index value: CREATE TABLE enums (a ENUM('2','1')) NET enum utility library which provides many operations as convenient extension methods. Enums.NET is a high-performance type-safe. Selecting by numeric index: SELECT * FROM fruits WHERE fruit=2 Install-Package Enums.NET -Version 4.0.0. ![]() | fruit | enum('apple','orange','pear') | YES | | NULL | |ĮRROR 1265 (01000): Data truncated for column 'fruit' at row 1 | id | int(11) | NO | PRI | NULL | auto_increment | | Field | Type | Null | Key | Default | Extra | Id INT NOT NULL auto_increment PRIMARY KEY, We suggest not using ENUM to store numerals, as there is little to no storage space benefit, and it is easy to confuse the enum integer with the enum numeral value by leaving out the quotes.Īn ENUM defined as ENUM('apple','orange','pear') would have the following index values: otherwise, the first value in the enumeration.ĮNUM values are indexed numerically in the order they are defined, and sorting will be performed in this numeric order.If a DEFAULT clause is missing, the default value will be: Its smart Schema Editor empowers you to create and modify all schema objects of supported databases such as Tables, Views, Fields, Enums, Links, Constraints. ![]() Inserting will fail with an error if strict mode is active. This may be confusing, because the empty string is also a possible value, and the only difference if that is this case its index is not 0. If strict SQL Mode is not enabled, and an invalid value is inserted into an ENUM, a special empty string, with an index value of zero (see Numeric index, below), is inserted, with a warning. If the ENUM column is declared to permit NULL values, NULL becomes a valid value, as well as the default value (see below). NULL and empty valuesĪn ENUM can also contain NULL and empty values. Trailing spaces are automatically stripped from ENUM values on table creation.ĮNUMs require relatively little storage space compared to strings, either one or two bytes depending on the number of enumeration values. X86 0: An Intel-based 32-bit processor architecture. X64 1: An Intel-based 64-bit processor architecture. ![]() Armv6 7: LoongArch64 6: S390x 5: The S390x platform architecture. ENUM values are represented internally as integers. Arm64 3: A 64-bit ARM processor architecture. In theory, an ENUM column can have a maximum of 65,535 distinct values in practice, the real maximum depends on many factors. A string object that can have only one value, chosen from the list of values 'value1', 'value2'. Syntax ENUM('value1','value2'.) Īn enumeration.
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