| Excerpt |
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Extracts the ranked unique Datetime value from the values in a column, where k=1 returns the maximum value. The value for k must be between 1 and 1000, inclusive. Inputs must be Datetime. |
For purposes of this calculation, two instances of the same value are treated as the same value of k. if your dataset contains three rows with column values 2020-02-15, 2020-02-14, 2020-02-14, and 2020-02-14, then KTHLARGESTDATE returns 2020-02-14 for k=2 and 2020-02-13 for k=3.
When used in a pivot transform, the function is computed for each instance of the value specified in the group parameter. See Pivot Transform.
Input column must be Datetime type. Other values column are ignored. If a row contains a missing or null value, it is not factored into the calculation.
For a version of this function that applies to non-Datetime values, see KTHLARGESTUNIQUE Function.
| D lang syntax |
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| RawWrangle | true |
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| Type | ref |
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| showNote | true |
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| WrangleText | pivot value:kthlargestuniqueDate(myDate, 3) limit:1 |
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kthlargestuniquedate(myDate, 3) |
Output: Returns the third highest unique value from the myDate column.
| D lang syntax |
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| RawWrangle | true |
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| Type | syntax |
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| showNote | true |
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| WrangleText | pivot value:kthlargestuniquedate(function_col_ref, k_integer) [ group:group_col_ref] [limit:limit_count] |
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kthlargestuniquedate(function_col_ref, k_integer) [ group:group_col_ref] [limit:limit_count] |
| Argument | Required? | Data Type | Description |
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| function_col_ref | Y | string | Name of column to which to apply the function |
| k_integer | Y | integer (positive) | The ranking of the unique value to extract from the source column |
For more information on the group and limit parameters, see Pivot Transform.
function_col_ref
Name of the column the values of which you want to calculate the mean. Inputs must be Datetime values.
- Literal values are not supported as inputs.
- Multiple columns and wildcards are not supported.
| Required? | Data Type | Example Value |
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| Yes | String (column reference) | transactionDate |
k_integer
Integer representing the ranking of the unique value to extract from the source column. Duplicate values are treated as a single value for purposes of this function's calculation.
| Info |
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NOTE: The value for k must be an integer between 1 and 1,000 inclusive. |
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k=1 represents the maximum value in the column. - If k is greater than or equal to the number of values in the column, the minimum value is returned.
- Missing and null values are not factored into the ranking of
k.
| Required? | Data Type | Example Value |
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| Yes | Integer (positive) | 4 |
Example - KTHLARGESTDATE functions
| Include Page |
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| EXAMPLE - KTHLARGESTDATE Functions |
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| EXAMPLE - KTHLARGESTDATE Functions |
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