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Murendeni_Baloyi
Contributor II
Contributor II

Loading Previous file date in a Loop

Hi qlik community.

I have folders and each folder name is a date. Each folder has a file in it. I want to loop through each file and add  a date column in each file but when looping current file I want the date to be date of the previous folder not current folder. For example, if I have two folders with named 20220815 and 20220816, the date that will be on the column for file inside the 20220816 folder should be 20220815. 

Here is my code to achieve that,  concatenating the files work but  getting date of the previous file on current one is not working. Please help 

SUB GetValueUnits (dir)

FOR EACH file in filelist('$(dir)' & '\' & '$(FILE_ID)' & '.csv') ;

vFileNo=$(vFileNo)+1;


IF $(vFileNo)=1 then


VALUE_OF_UNITS:
LOAD PRODUCT,
PORTFOLIO,
Date('$(vExtract_date)', 'YYYY-MM-DD') as EXTRACT_DATE,
NO_OF_UNITS,
UNIT_PRICE,
VALUE_OF_UNITS
FROM
'$(file)'
(txt, codepage is 28591, embedded labels, delimiter is ',', msq);

ELSE

LOAD PRODUCT,
PORTFOLIO,
Date('$(vExtract_date)', 'YYYY-MM-DD') as EXTRACT_DATE,
NO_OF_UNITS,
UNIT_PRICE,
VALUE_OF_UNITS
FROM
'$(file)'
(txt, codepage is 28591, embedded labels, delimiter is ',', msq);


END IF ;

NEXT file;

SET file=;

END SUB

SUB doDir (root)

vFileNo=0;
FILE_ID = 'Value of Units';
vstartdate= num(MakeDate(2022,08,14));


FOR EACH subdir in dirlist( '$(root)'& '\*' )

vDirType=right('$(subdir)',8) //folder name = folder date

IF isnum(vDirType)=-1 then

vDirDate=num(makedate(left('$(vDirType)',4),mid('$(vDirType)',5,2),mid('$(vDirType)',7,2))) //making file date to be datetype

IF '$(vDirDate)'>'$(vstartdate)' then //getting files from only two months back

//getting file dates here 
FILEDATES:
LOAD ROWNO() AS FILE_NO,
NUM(RIGHT('$(subdir)',8)) as DATES
AUTOGENERATE 1;

LET NumRows=NoOfRows('FILEDATES');

FOR i=-1 to $(NumRows)

LET vDate=FieldValue('DATES',$(i));
vExtract_date=num(makedate(left('$(vDate)',4),mid('$(vDate)',5,2),mid('$(vDate)',7,2)))


NEXT;


CALL GetValueUnits('$(subdir)')



END IF


END IF
NEXT subdir;

END SUB

 

Labels (1)
3 Replies
andrey_krylov
Specialist
Specialist

T1: LOAD Distinct EXTRACT_DATE, Peek(EXTRACT_DATE) as Desired_Date Resident VALUE_OF_UNITS Order By EXTRACT_DATE;
Left Join (VALUE_OF_UNITS) LOAD * Resident T1; Drop Table T1;

Murendeni_Baloyi
Contributor II
Contributor II
Author

This does work by it duplicates the dates ,  both EXTRACT_DATE and Desired_Date 

 

andrey_krylov
Specialist
Specialist

Oh,  I see. Try then

Left Join (VALUE_OF_UNITS) LOAD *, Peek(EXTRACT_DATE ) as Desired_Date; LOAD Max(EXTRACT_DATE ) as EXTRACT_DATE Resident VALUE_OF_UNITS Group By EXTRACT_DATE Order By EXTRACT_DATE ;