A data type defines what values or possible set of values exist in a column.
Primitive data types
Primitive data types describe the basic data available in a column.
| Data type | Description |
|---|---|
| boolean | A value that is either
true or
false.
|
| number | A numeric value. |
| string | A unicode string of any length. |
| date | A date specified by year, month, and day
only (for example,
2016-12-07).
|
| instant | A UTC timestamp (for example,
2016-12-07T23:49:06Z).
|
| id | A unique ID that references a value in a column. |
Custom data types
Custom data types typically define the values for Single or Multiple Choice question types.
| Constructor | Description | ||
|---|---|---|---|
identifier
|
Determines a member's unique identifier. Possible data type values are represented as either string or number. |
||
enum
|
Allows for one value from a list of possible values that are the same type. The values themselves are represented by the string data type. For example, a survey contains the following Single Choice
question:
In the example above, the values could be either
|
||
set
|
Allows for multiple values from a list of possible values. Duplicate answer IDs are not allowed, and the order of the IDs is not important. For example, your survey contains the following Multiple
Choice question:
In the example above, the set value could be any combination of all of the values in the list.
Note: An empty set is a possible value for any
set type. You may see an empty set when a
participant does not answer a Multiple Choice Grid question because it does not
apply to them. For more information see,
Missing, null, or empty values in records.
|