# FieldInTableData

## Properties

| Name | Description | Type |
| --- | --- | --- |
| qName | Name of the field. | String |
| qOriginalFields | Is shown for fixed records.<br>*qOriginalFieldName* and *qName* are identical if no field names are used in the file.<br>*qOriginalFieldName* differs from *qName* if embedded file names are used in the file. | Array of String |
| qPresent |  | Boolean |
| qHasNull | This property is set to true if the field contains some Null values. | Boolean |
| qHasWild |  | Boolean |
| qHasDuplicates | This property is set to true if the field contains some duplicate values. | Boolean |
| qIsSynthetic | This property is set to true if the field contains a synthetic key. | Boolean |
| qInformationDensity | Number of records that have values (for example, not NULL) in the field as compared to the total number of records in the table. | Number (double) |
| qnNonNulls | Number of values that are non Null. | Integer |
| qnRows | Number of rows in the field. | Integer |
| qSubsetRatio | Number of distinct values in the field (in the current table) as compared to the total number of distinct values of this field (in all tables). | Number (double) |
| qnTotalDistinctValues | Number of distinct values in the field. | Integer |
| qnPresentDistinctValues |  | Integer |
| qKeyType | Tells if the field is a key field.<br><br>One of:<br><br><ul><li>NOT_KEY</li><li>ANY_KEY</li><li>PRIMARY_KEY</li><li>PERFECT_KEY</li></ul> | String |
| qComment | Comment related to the field. | String |
| qTags | List of tags related to the field. | Array of String |
| qDerivedFields | List of the derived fields. | Array of [DerivedFieldsInTableData](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/EngineJSONAPI/Content/models-derivedfieldsintabledata.htm) |
| qIsFieldOnTheFly |  | Boolean |
| qReadableName |  | String |