I'm trying to find out the weekday i.e Mon, Tue, Wed etc. from a date-range formatted as yyyy mm dd
I tried to use the formula format(day(Date Table),"ddd"), but the weekday is wrong. In my example, the output of 2020.01.01 gives Sunday, but it should be Wednesday.
I think your formula is wrong:
Instead of
format(day(Date Table),"ddd")
Use
format(<Target Table>[<date column>],"ddd")
I.e. Omit the DAX DAY call. This is resulting in the day of the month (1..31) being passed to the format function.
When you use the DAY function in DAX, it returns the day of the month (1 through 31).
Thus DAY ( DATE ( 2020, 1, 1) ) = 1 which means you're trying to format the number 1 as a date. Integers are interpreted as days since 1899/12/30 when treated as a date, so 1 corresponds to 1899/12/31, which happened to be a Sunday. Thus FORMAT(1, "ddd") = "Sun".
There's no reason to get DAY involved here. You can simply write
Day = FORMAT ( 'Calendar'[Date], "ddd" )
Related
I'm trying to manipulate a date value to go back in time exactly 1 ISO-8601 year.
The following does not work, but best describes what I want to accomplish:
date_add(date '2018-01-03', interval -1 isoyear)
I tried string conversion as an intermediate step, but that doesn't work either:
select parse_date('%G%V%u',safe_cast(safe_cast(format_date('%G%V%u',date '2018-01-03') as int64)-1000 as string))
The error provided for the last one is "Failed to parse input string "2017013"". I don't understand why, this should always resolve to a unique date value.
Is there another way in which I can subtract an ISO year from a date?
This gives the corresponding day of the previous ISO year by subtracting the appropriate number of weeks from the date. I based the calculation on the description of weeks per year from the Wikipedia page:
CREATE TEMP FUNCTION IsLongYear(d DATE) AS (
-- Year starting on Thursday
EXTRACT(DAYOFWEEK FROM DATE_TRUNC(d, YEAR)) = 5 OR
-- Leap year starting on Wednesday
(EXTRACT(DAY FROM DATE_ADD(DATE(EXTRACT(YEAR FROM d), 2, 28), INTERVAL 1 DAY)) = 29
AND EXTRACT(DAYOFWEEK FROM DATE_TRUNC(d, YEAR)) = 4)
);
CREATE TEMP FUNCTION PreviousIsoYear(d DATE) AS (
DATE_SUB(d, INTERVAL IF(IsLongYear(d), 53, 52) WEEK)
);
SELECT PreviousIsoYear('2018-01-03');
This returns 2017-01-04, which is the third day of the 2017 ISO year. 2018-01-03 is the third day of the 2018 ISO year.
I have three columns with date formatted differently in SAS:
12 june 2017 00:15 - full date
2016 - only year
12 - only month
I Need to change the format of date and subtract after the dates to get results in the number of months.
for instance, "12 June 2017 00:15" - December 2016 = 7
how to do it?
As you have probably already found, there isn't a ready-made SAS date informat that will correctly handle your full date field, so you'll need to write a bit of custom logic to convert it before doing your calculation. date9. is the closest matching format I could find:
data example;
fulldate = '12 june 2017 00:15';
year = 2016;
month = 12;
/* Convert string to date9 format and input */
fulldate_num = input(
cats(
scan(fulldate,1),
substr(scan(fulldate,2,' '),1,3),
scan(fulldate,3)
), date9.
);
/* Calculate difference in months */
monthdiff = intck('month', mdy(month,1,year), fulldate_num);
run;
Convert the "full date" field to a SAS date value.
Convert the combo of year and month to a SAS date value, too.
Use the INTCK function to find the difference in months.
For example:
data dates ;
input dt $18. yy mm ;
mm_diff = intck ("mon", input (cats (yy, mm), yymmn6.), input (dt, anydtdte12.)) ;
put mm_diff= ;
cards ;
12 june 2017 00:15 2016 12
11 june 2018 00:15 2017 3
;
run ;
The log will print:
mm_diff=6
mm_diff=15
As a side note, the statement "there isn't a ready-made SAS date informat that will correctly handle your full date field" made elsewhere in this thread is incorrect. As the program snippet above shows, the ANYDTDTEw. informat handles it with aplomb. It's just incumbent upon the programmer to supply a sufficient informat width W. Above, it is selected as W=12. If you're reluctant to guess and/or count, just use ANYDTDTE32.
Regards,
Paul Dorfman
Assuming that you have three numeric variables and the first one contains valid SAS datetime values you should first convert both to valid SAS date values. You can then use the INTCK() function to count months.
nmonths = intck('month',datepart(VAR1),mdy(VAR3,1,VAR2));
LibreOffice Calc spreadsheet offers a function ISOWEEKNUM to return the standard ISO 8601 week number of the specified date.
I want the opposite.
➠ Given a standard week number, give me the date of the first day of that week (the Monday date).
Passing integers is acceptable. Also nice if able to pass a string in standard format.
Like this:
DATE_OF_ISOWEEKNUM( 2017 , 42 ) ➝ date of Monday of week 42 in week-based year 2017
DATE_OF_ISOWEEKNUM( "2017-W42" ) ➝ date of Monday of week 42 in week-based year 2017
Ideally, I would be able to pass a number 1-7 for Monday-Sunday to specify the day-of-week for which I want a date. Something like this:
DATE_OF_ISOWEEKNUM( 2017 , 42 , 1 ) ➝ date of Monday of week 42 in week-based year 2017
DATE_OF_ISOWEEKNUM( "2017-W42-1" ) ➝ date of Monday of week 42 in week-based year 2017
DATE_OF_ISOWEEKNUM( 2017 , 42 , 7 ) ➝ as above, but Sunday
DATE_OF_ISOWEEKNUM( "2017-W42-7" ) ➝ as above, but Sunday
Example:
Formula:
=DATE(B$1,1,$A4*7)+(2-WEEKDAY(DATE(B$1,1,$A4*7)))-7*(ISOWEEKNUM(DATE(B$1,1,1))=1)
Calculate the date of day (weeknumber * 7) in the year.
Correct the day to be weekday Monday.
Correct to 7 days before, if the first day of the year is in the
first ISO weeknumber.
I have a custom list that I'm trying to restrict data entry for valid day of week and time.
My current column validation works for day of week being Monday, Wednesday or Friday. It looks like this:
=CHOOSE(WEEKDAY([Requested date for approval]),FALSE,TRUE,FALSE,TRUE,FALSE,TRUE,FALSE)
I'm trying to figure out the syntax to add that it also has to be between 8 am and 12:00 pm on those days.
Any help would be greatly appreciated.
You would use an AND statement to include a second criteria
=AND(CHOOSE(WEEKDAY([Requested date for approval]),FALSE,TRUE,FALSE,TRUE,FALSE,TRUE,FALSE),
AND(
[Requested date for approval]-INT([Requested date for approval])*24 >= 8,
[Requested date for approval]-INT([Requested date for approval])*24 <= 24
)
)
I confess, I've never heard of the CHOOSE function, but the time calculation is based on the information at Microsoft
Convert times
To convert hours from the standard time format to a decimal number, use the INT
function.
Column1 Formula Description (possible result)
10:35 AM =([Column1]-INT([Column1]))*24 Number of hours since 12:00 AM (10.583333)
12:15 PM =([Column1]-INT([Column1]))*24 Number of hours since 12:00 AM (12.25)
EDIT
To calculate the day of the week, you can use the TEXT function to return the day of the week (i.e. Monday)
=TEXT(WEEKDAY([ColumnName]), "dddd")
It won't be pretty, but you can use a series of AND logical operators
=AND(
TEXT(WEEKDAY([Requested date for approval]), "dddd") = "Monday",
AND(
TEXT(WEEKDAY([Requested date for approval]), "dddd") = "Wednesday",
AND(
TEXT(WEEKDAY([Requested date for approval]), "dddd") = "Friday",
AND(
[Requested date for approval]-INT([Requested date for approval])*24 >= 8,
[Requested date for approval]-INT([Requested date for approval])*24 <= 24
)
)
)
)
Posting Working Solution
=IF(
AND(
CHOOSE(
WEEKDAY([Requested date for approval]),FALSE,TRUE,FALSE,TRUE,FALSE,TRUE,FALSE
),
([Requested date for approval]-INT([Requested date for approval]))*24>=8,
([Requested date for approval]-INT([Requested date for approval]))*24<=12
),
TRUE
)
I wonder if anyone could help on this please? I need to show the current month as a 2 digit field. IE
January as 01
February as 02
March as 03
etc until
October as 10
November as 11
December as 12
The formula I am using is: ToText ("0"& Month(CurrentDate))
but shows January as 01.00
ie need to remove the decimal point and the decimal places
Many thanks, Rob
Try this:
ToText( CurrentDate, "MM")
The ToText function will automatically convert the date you are supplying to whatever format you want. You don't need to use the Month function. Per the documentation, you just supply the date and the output format. For the month, you use "MM".
ToText(CurrentDate, "MM")
According to the documention, these are the valid strings you can use
Pattern Result
d Numeric day of month without leading zero (1, 7, 31)
dd Numeric day of month with leading zero (01, 07, 31)
ddd Three day abbreviation of day of week (Mon, Sat)
dddd Full name of day of week (Monday, Saturday)
M Numeric month without leading zero (1, 7, 12)
MM Numeric month with leading zero (01, 07, 12)
MMM Three letter abbreviation of month (Jan, Feb, Mar)
MMMM Full name of month (January, February, March)
yy Last two digits of year (11, 14, 22)
yyyy Full four digits of year (2011, 2014, 2022)
To add to the above, if you need to return something like Mar-17 then:
totext({Command.DocDate},"MMM") + '-' + totext({Command.DocDate},"yy")