N/dataset Module
dataset.createColumn()
Method Description: Creates a dataset column based on a field or on a formula and a type.
Returns: dataset.Column
Supported Script Types: Server scripts For more information, see SuiteScript 2.0 Script Types.
Governance: None
Module: N/dataset Module
Sibling Module Members: N/dataset Module Members
Since: 2020.2
Search NetSuite - https://system.netsuite.com/app/help/helpcenter.nl?search=dataset.createColumn(options)

// Code Example 1

// Add additional code

//...

// Create a field column

var myFieldColumn = dataset.createColumn({

    fieldId: 'name',

    name: 'My Field Column'

});

// Create a formula/type column

var myFormulaColumn = dataset.createColumn({

    formula: '{email}',

    type: 'STRING',

    id: 11,

    label: 'My Formula Column'

});

// Create a join column

var myJoinColumn = dataset.createColumn({

    fieldId: 'name',

    join: myJoin  // Create this using dataset.createJoin

});

//...

// Add additional code



//SOURCE: https://system.netsuite.com/app/help/helpcenter.nl?fid=section_158990102328.html