topic Re: Date Set Union and Weekday Analysis in QlikView

Date Set Union and Weekday Analysis

Wed, 25 Jan 2012 20:32:47 GMT

Long winded one this

I have a table of EmployeeIDs and Dates which logs the dates the employee was absent.

For example

ID	Type	Date	Weekday
2	Sick	12/9/11	Fri
2	Sick	12/12/11	Mon
2	Paid Holiday	12/13/11	Tues
3	Sick	...	..
4	Sick	3/4/5	xxx

When I click in a lostbox of my employees, I can see all instances of their sickness and paid holidays. Perfect.

I have another table of public holidays (not conclusive).

Date	Holiday
12/25/11	Christmas Day
12/26/11	Boxing Day

I'd like to produce a list of all days the employee was sick, paid holiday and public holidays too. this is essentially unioning a fixed table of public holidays with a selection-dependant table of sick/paid holidays. I tried a few things in editing the dimension with no luck, I think Im getting the syntax wrong. Something along the lines of currentlySelected(Date) + (<isPublicHoliday=1> Date)

Anyway Part 2).

So lets look at Employee 2. Poor guy was off sick on Friday, Monday, and then took some holiday time Tuesday. I'd like to highlight a SICK event which is immediately adjacent to a PAIDHOLIDAY or PUBLICHOLIDAY date. So if theres a holiday on Wednesday and hes sick on Tuesday, the Tuesday event will get flagged.

ExtraBonus points for highlighting the day if the public holiday is Monday and hes sick on the Friday 3 days before.

I know this hard and quite specific but Ive been trying for ages!!

Re: Date Set Union and Weekday Analysis

swuehl — Thu, 26 Jan 2012 14:07:52 GMT

To create a list of all absent days for a given employee, you could probably work with a master calendar and use some expression checks to draw the Sick, public holiday and paid holiday. I played a little bit with this using advanced agreggation, but I think this is probably not performant enough.

I assume we could do all the stuff you want in the script, since the flagging should only be quite static, right?

So I decided to create for each employee a list of all days he was absent, so I get one big table, duplicating public holidays, but I believe there are not so many and they should compress quite well in memory.

After you have one big table, you need to go through the list of absent day two times, one time ordered by ID and Date descending, second ID and Date ascending (because I work with peek() function to access the previous record, but I want to check the days in the future and in the past as well).

Note that I didn't check for change in ID here, because I believe if you have at least 2 public holidays spread over the year, you are getting some kind of "natural" delimiter.

So my script looks like

SICK:

LOAD ID, Type, Date, Weekday(Date) as Weekday INLINE [

ID, Type, Date,

1, Paid Holiday, 12/8/11

2, Sick, 12/9/11

2, Sick, 12/12/11

2, Paid Holiday, 12/13/11

3, Sick, 3/2/12

3, Paid Holiday, 3/5/12

4, Sick, 3/5/12

4, Paid Holiday, 3/2/12

];

RESULT:

load distinct ID resident SICK;

join (RESULT) LOAD Date, Holiday, WeekDay(Date) as Weekday, 'Public Holiday' as Type INLINE [

Date, Holiday

12/25/11, Christmas Day

12/26/11, Boxing Day

];

Concatenate LOAD * resident SICK;

drop table SICK;

FLAG:

LOAD *,

if(Type='Sick' and (peek(Type)='Paid Holiday' or peek(Type)='Public Holiday') and (peek(Date)-Date=1 or (peek(Date)-Date=3 and Weekday=4)),1) as FlagDesc

Resident RESULT order by ID,Date Desc;

LOAD ID, Date, Type, Holiday, Weekday,

if(Type='Sick' and (peek(Type)='Paid Holiday' or peek(Type)='Public Holiday') and (Date-peek(Date)=1 or (Date-peek(Date)=3 and Weekday=0)),1,FlagDesc) as Flag

Resident FLAG order by ID,Date;

drop tables RESULT, FLAG;

Re: Date Set Union and Weekday Analysis

Thu, 02 Feb 2012 15:40:06 GMT

This is a fairly amazing reply., Stefan! I'm sure the logic is correct but Im having difficulty integrating it into my dashboard, probably as my design technique isnt refined as it will be .My data is coming from a few seperate excel files so its a little harder than I thought, I would love your help.

Re: Date Set Union and Weekday Analysis

swuehl — Thu, 02 Feb 2012 16:40:59 GMT

Updated your script.

I think you should have an eye on Bobby...