Contents:
- Source values can be Integer literals or column references to values that can be inferred as Integers.
- If any of the source values are invalid or out of range, a missing value is returned.
- This function must be nested within another function that accepts date values, such as
DATEFORMAT, as arguments. See the example below.
Wrangle vs. SQL: This function is part of Wrangle, a proprietary data transformation language. Wrangle is not SQL. For more information, see Wrangle Language.
Basic Usage
Integer literal values:
dateformat(date(2015,02,15),'yyyy-MM-dd')
Output: Returns the formatted date value: 2015-02-15.
Column reference values:
dateformat(date(myYear, myMonth, myDay),'MMM yyyy')
Output: Returns date values based on three columns, formatted for date.
Syntax and Arguments
dateformat(date(year_integer_col,month_integer_col,day_Integer_col ),'date_format_string')
| Argument | Required? | Data Type | Description |
|---|---|---|---|
| year_integer_col | Y | integer | Name of column or Integer literal representing the year value to apply to the function |
| month_integer_col | Y | integer | Name of column or Integer literal representing the month value to apply to the function |
| day_integer_col | Y | integer | Name of column or Integer literal representing the day value to apply to the function |
| date_format_string | Y | string | String literal identifying the date format to apply to the value |
For more information on syntax standards, see Language Documentation Syntax Notes.
year_integer_col
Integer literal or name of the column containing integer values for the year.
- Missing values for this function in the source data result in missing values in the output.
- Multiple columns and wildcards are not supported.
Usage Notes:
| Required? | Data Type | Example Value |
|---|---|---|
| Yes | Integer (literal or column reference) | 2015 |
month_integer_col
Integer literal or name of the column containing integer values for the month.
- Values must be
1or more, with a maximum value of12. - Missing values for this function in the source data result in missing values in the output.
- Multiple columns and wildcards are not supported.
Usage Notes:
| Required? | Data Type | Example Value |
|---|---|---|
| Yes | Integer (literal or column reference) | 4 |
day_integer_col
Integer literal or name of the column containing integer values for the day.
- Values must be
1or more, with a maximum value for any month of31. - Missing values for this function in the source data result in missing values in the output.
- Multiple columns and wildcards are not supported.
Usage Notes:
| Required? | Data Type | Example Value |
|---|---|---|
| Yes | Integer (literal or column reference) | 26 |
date_format_string
For more information on supported data formatting strings, see Supported Data Types.
For more information, see DATEFORMAT Function.
Tip: For additional examples, see Common Tasks.
Examples
Example - date and time functions
DATE and TIME functions operate. Both functions require that their outputs be formatted properly using the DATEFORMAT function.DATE- Generates valid Datetime values from three integer inputs: year, month, and day. See DATE Function.TIME- Generates valid Datetime values from three integer inputs: hour, minute, and second. See TIME Function.DATETIME- Generates valid Datetime values from six integer inputs: year, month, day, hour, minute, and second. See DATETIME Function.DATEFORMAT- Formats valid Datetime values according to the provided formatting string. See DATEFORMAT Function.
Source:
| year | month | day | hour | minute | second |
|---|---|---|---|---|---|
| 2016 | 10 | 11 | 2 | 3 | 0 |
| 2015 | 11 | 20 | 15 | 22 | 30 |
| 2014 | 12 | 25 | 18 | 30 | 45 |
Transformation:
| Transformation Name | New formula |
|---|---|
| Parameter: Formula type | Single row formula |
| Parameter: Formula | DATEFORMAT(DATE (year, month, day),'yyyy-MM-dd') |
| Parameter: New column name | 'fctn_date' |
| Transformation Name | New formula |
|---|---|
| Parameter: Formula type | Single row formula |
| Parameter: Formula | DATEFORMAT(TIME (hour, minute, second),'HH-mm-ss') |
| Parameter: New column name | 'fctn_time' |
| Transformation Name | New formula |
|---|---|
| Parameter: Formula type | Single row formula |
| Parameter: Formula | DATEFORMAT(DATETIME (year, month, day, hour, minute, second),'yyyy-MM-dd-HH:mm:ss') |
| Parameter: New column name | 'fctn_datetime' |
Results:
NOTE: All inputs must be inferred as Integer type and must be valid values for the specified input. For example, month values must be integers between 1 and 12, inclusive.
| year | month | day | hour | minute | second | fctn_date | fctn_time | fctn_datetime |
|---|---|---|---|---|---|---|---|---|
| 2016 | 10 | 11 | 2 | 3 | 0 | 2016-10-11 | 02-03-00 | 2016-10-11-02:03:00 |
| 2015 | 11 | 20 | 15 | 22 | 30 | 2015-11-20 | 15-22-30 | 2015-11-20-15:22:30 |
| 2014 | 12 | 25 | 18 | 30 | 45 | 2014-12-25 | 18-30-45 | 2014-12-25-18:30:45 |
You can apply other date and time functions to the generated columns. For an example, see YEAR Function.
This page has no comments.