Convert 6 digit number to date

[qlikmark1990]

I tried to convert a 6 digit number like 010160 to a date in DDMMYYYY format to get 01-01-1960. The exact format of the column to convert to a new column is:

zoeknaam

010160AC-1

180572BU-4

170258HO-5

190580EN-8

300551CA-11

190477DA-14

281069AD-15

So far I removed the last charactars exept the number by using the following code and I extracted the number 1 as a new column patiëntId:

NAV:

LOAD zoeknaam, geslacht, H_PC, geboortedatum, land, SubField(zoeknaam, '-', -1) as patiëntId,

Date(Date#(PurgeChar (SubField(zoeknaam, '-', -2), 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'),'DD-MM-YY'),'DD/MM/YYYY') as geboortedatumcheck

to convert to a date but it doesn't work. The output in geboortedatumcheck should be:

geboortedatumcheck
01-01-1960
18-05-1972
17-02-1958
19-05-1980
30-05-1951
19-04-1977
28-10-1969

The code:

PurgeChar (SubField(zoeknaam, '-', -2), 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz') as geboortedatumcheck

works properly and gives the numeric values as:

geboortedatumcheck
010160
180572
170258
190580
300551
190477
281069

How can I convert the 6 digit numbers to a date as shown?

[marcus_sommer]

Try it with:

date(date#(left(zoeknaam, 6), 'DDMMYY'), 'DD-MM-YYYY')

- Marcus

[Anil_Babu_Samineni]

How about this?

Date(Date#(Left(Field,6), 'DDMMYY'), 'DD-MM-YYYY') as geboortedatumcheck

[tresesco]

If your Year of date is fixed to be 1900+.. then try like:

Date(Date#(Left(zoeknaam,4)&'19'&Mid(zoeknaam,5,2), 'DDMMYYYY')) as Date

[Anil_Babu_Samineni]

Haha, Nice

[Colin-Albert · Accepted solution]

To handle years after 1999, you would need to include a cut-off so years after 30 are processed as 19xx and years 30 or lower are processed as 20xx

Something like

     Date(Date#(Left(zoeknaam,4) &

          if( Mid(zoeknaam,5,2) > 30, '19' & Mid(zoeknaam,5,2), '20' & Mid(zoeknaam,5,2) ), 'DDMMYYYY')) as Date

[tresesco]

Hi Colin,

...years after 30 are processed as 19xx and years 30 or lower are processed as 20xx

Didn't know that. But always wondered it would be something so. Is this documented somewhere? Could you please redirect?

Thanks

[Colin-Albert]

This is a cut-off that you determine based on the value used for comparison in the if statement.

There is no standard for this, I just used 30 as an example.

If your data spans more than 100 years (which is possible if it is a date of birth) then there is no way to determine if the correct date is 19xx or 20xx from a 2-digit year!

[sunny_talwar]

I wonder if this is static or if it keeps on changing... because although it is still far away, we will eventually be in 2031 and at that time it would somehow need to read the date correctly

[tresesco]

That's true. I just wanted to understand the logic Qlik follows. See, when I try to parse the data in YY format, qlik reads somewhere as 19XX and somewhere 20XX.

Date(Date#(Left(zoeknaam,6), 'DDMMYY')) as Date

It could be similar to what you explain, only the number could be different, may be 50 instead of your 30?