day - script and chart function
This function returns an integer representing the day when the fraction of the expression is interpreted as a date according to the standard number interpretation.
The function returns the day of the month for a particular date. It is commonly used to derive a day field as part of a calendar dimension.
Syntax:
day(expression)
Return data type: integer
Example | Result |
---|---|
day( 1971-10-12 ) |
returns 12 |
day( 35648 ) | returns 6, because 35648 = 1997-08-06 |
Example 1 – DateFormat dataset (script)
Overview
Open the Data load editor and add the load script below to a new tab.
The load script contains:
-
A dataset of dates named Master_Calendar. The DateFormat system variable is set to DD/MM/YYYY.
-
A preceding load that creates an additional field, named day_of_month, using the day() function.
-
An additional field, named long_date, using the date() function to express the full month name.
Load script
SET DateFormat='DD/MM/YYYY';
Master_Calendar:
Load
date,
date(date,'dd-MMMM-YYYY') as long_date,
day(date) as day_of_month
Inline
[
date
03/11/2022
03/12/2022
03/13/2022
03/14/2022
03/15/2022
03/16/2022
03/17/2022
03/18/2022
03/19/2022
03/20/2022
03/21/2022
];
Results
Load the data and open a sheet. Create a new table and add these fields as dimensions:
-
date
-
long_date
-
day_of_month
date |
long_date |
day_of_month |
---|---|---|
03/11/2022 |
11-March- 2022 |
11 |
03/12/2022 |
12-March- 2022 |
12 |
03/13/2022 |
13-March- 2022 |
13 |
03/14/2022 |
14-March- 2022 |
14 |
03/15/2022 |
15-March- 2022 |
15 |
03/16/2022 |
16-March- 2022 |
16 |
03/17/2022 |
17-March- 2022 |
17 |
03/18/2022 |
18-March- 2022 |
18 |
03/19/2022 |
19-March- 2022 |
19 |
03/20/2022 |
20-March- 2022 |
20 |
03/21/2022 |
21-March- 2022 |
21 |
The day of the month is correctly evaluated by the day() function in the script.
Example 2 – ANSI dates (script)
Overview
Open the Data load editor and add the load script below to a new tab.
The load script contains:
-
A dataset of dates named Master_Calendar. The DateFormat system variable DD/MM/YYYY is used. However, the dates that are included in the dataset are in ANSI standard date format.
-
A preceding load that creates an additional field, named day_of_month, using the date() function.
-
An additional field, named long_date, using the date() function to express the date with the full month name.
Load script
SET DateFormat='DD/MM/YYYY';
Master_Calendar:
Load
date,
date(date,'dd-MMMM-YYYY') as long_date,
day(date) as day_of_month
Inline
[
date
2022-03-11
2022-03-12
2022-03-13
2022-03-14
2022-03-15
2022-03-16
2022-03-17
2022-03-18
2022-03-19
2022-03-20
2022-03-21
];
Results
Load the data and open a sheet. Create a new table and add these fields as dimensions:
-
date
-
long_date
-
day_of_month
date |
long_date |
day_of_month |
---|---|---|
03/11/2022 | 11-March- 2022 | 11 |
03/12/2022 | 12-March- 2022 | 12 |
03/13/2022 | 13-March- 2022 | 13 |
03/14/2022 | 14-March- 2022 | 14 |
03/15/2022 | 15-March- 2022 | 15 |
03/16/2022 | 16-March- 2022 | 16 |
03/17/2022 | 17-March- 2022 | 17 |
03/18/2022 | 18-March- 2022 | 18 |
03/19/2022 | 19-March- 2022 | 19 |
03/20/2022 | 20-March- 2022 | 20 |
03/21/2022 | 21-March- 2022 | 21 |
The day of the month is correctly evaluated by the day() function in the script.
Example 3 – Unformatted dates (script)
Overview
Open the Data load editor and add the load script below to a new tab.
The load script contains:
-
A dataset of dates named Master_Calendar. The DateFormat system variable DD/MM/YYYY is used.
-
A preceding load that creates an additional field, named day_of_month, using the day() function.
-
The original unformatted date, named unformatted_date.
-
An additional field, named long_date, using the date() is used to convert the numerical date into a formatted date field.
Load script
SET DateFormat='DD/MM/YYYY';
Master_Calendar:
Load
unformatted_date,
date(unformatted_date,'dd-MMMM-YYYY') as long_date,
day(date) as day_of_month
Inline
[
unformatted_date
44868
44898
44928
44958
44988
45018
45048
45078
45008
45038
45068
];
Results
Load the data and open a sheet. Create a new table and add these fields as dimensions:
-
unformatted_date
-
long_date
-
day_of_month
unformatted_date |
long_date |
day_of_month |
---|---|---|
44868 |
03-November- 2022 |
3 |
44898 |
03-December- 2022 |
3 |
44928 |
02-January- 2023 |
2 |
44958 |
01-February- 2023 |
1 |
44988 |
03-March- 2023 |
3 |
45008 |
23-March- 2023 |
23 |
45018 |
02-April- 2023 |
2 |
45038 |
22-April- 2023 |
22 |
45048 |
02-May- 2023 |
2 |
45068 |
22-May- 2023 |
22 |
45078 |
01-June- 2023 |
1 |
The day of the month is correctly evaluated by the day() function in the script.
Example 4 – Calculating expiry month (chart)
Overview
Open the Data load editor and add the load script below to a new tab.
The load script contains:
-
A dataset of orders placed in March named Orders. The table contains three fields:
-
id
-
order_date
-
amount
-
Load script
Orders:
Load
id,
order_date,
amount
Inline
[
id,order_date,amount
1,03/01/2022,231.24
2,03/02/2022,567.28
3,03/03/2022,364.28
4,03/04/2022,575.76
5,03/05/2022,638.68
6,03/06/2022,785.38
7,03/07/2022,967.46
8,03/08/2022,287.67
9,03/09/2022,764.45
10,03/10/2022,875.43
11,03/11/2022,957.35
];
Results
Load the data and open a sheet. Create a new table and add this field as a dimension:order_date.
To calculate the delivery date, create this measure: =day(order_date+5).
order_date |
=day(order_date+5) |
---|---|
03/11/2022 |
16 |
03/12/2022 |
17 |
03/13/2022 |
18 |
03/14/2022 |
19 |
03/15/2022 |
20 |
03/16/2022 |
21 |
03/17/2022 |
22 |
03/18/2022 |
23 |
03/19/2022 |
24 |
03/20/2022 |
25 |
03/21/2022 |
26 |
The day() function correctly determines that an order placed on the 11th of March would be delivered on the 16th based on a 5 day delivery period.