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DATE Function

Generates a date value from three inputs of Integer type: year, month, and day.

  • 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 1 or more, with a maximum value of 12.

  • 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 1 or more, with a maximum value for any month of 31.

  • 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

String literal that describes how the date value is formatted.

Usage Notes:

Required?

Data Type

Example Value

Yes

String literal value

'yyyy-MM-dd'

For more information, see DATEFORMAT Function.

Examples

ヒント

For additional examples, see Common Tasks.

Example - date and time functions

This example provides an overview on various date and time functions.

Functions:

Item

Description

DATE Function

Generates a date value from three inputs of Integer type: year, month, and day.

TIME Function

Generates time values from three inputs of Integer type: hour, minute, and second.

DATETIME Function

Generates a Datetime value from the following inputs of Integer type: year, month, day, hour, minute, and second.

DATEFORMAT Function

Formats a specified Datetime set of values according to the specified date format. Source values can be a reference to a column containing Datetime values.

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:

注記

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.