topic Help formatting source file on script load in QlikView

Help formatting source file on script load

Tue, 11 Feb 2014 21:51:59 GMT

I'm reading in a file that's in a non-ideal format. The left-most field contains a row with a phone number immediately followed by a corresponding user name. The data associated with the name/number is on the row containing the number (as shown below).

Field_1	Some_Data_1	Some_Data_2
313.212.2112	123	ABC
Name_1
212.556.9845	234	THB
Name_2
234.564.9875	456	XYZ
Name_3

I'd like to load the number and then create a new field entitled "UserName" that extracts the name immediately below each number (and then ignore the rest of the blank line). It would be formatted as shown below. Is this possible using cross tables or some other method?

Field_1	UserName	Some_Data_1	Some_Data_2
313.212.2112	Name_1	123	ABC
212.556.9845	Name_2	234	THB
234.564.9875	Name_3	456	XYZ

Re: Help formatting source file on script load

maxgro — Tue, 11 Feb 2014 22:06:50 GMT

just an idea

first read rows 1,3, 5, 7; make a field with row number (ID); this is TAB1

then read rows 2, 4, 6, 8, make a field with row number -1 (ID); this is TAB2

you have 2 tables joined by the same ID

Result

Script

Source:

LOAD * INLINE [

Field_1, Some_Data_1, Some_Data_2

313.212.2112, 123, ABC

Name_1

212.556.9845, 234, THB

Name_2,

234.564.9875, 456, XYZ

Name_3

];

Tab1:

NoConcatenate LOAD RecNo() as ID, * Resident Source where not even(RecNo());

Tab2:

NoConcatenate LOAD RecNo()-1 as ID, Field_1 as Name Resident Source where even(RecNo());

DROP Table Source;

Re: Help formatting source file on script load

Tue, 11 Feb 2014 22:13:30 GMT

Good idea. Is there a simple way to only load odd/even rows?

Re: Help formatting source file on script load

maxgro — Tue, 11 Feb 2014 22:15:28 GMT

yes, I found a function in the online help

even(n)

Returns true if n is an even integer, false if n is an odd integer and NULL if n is not an integer.

Examples:

even( 3 ) returns false

even( 2 * 10 ) returns true

even( 3.14 ) returns NULL

Re: Help formatting source file on script load

Tue, 11 Feb 2014 22:26:26 GMT

Thanks, I'll give it a go with RowNo() as the parameter.

Re: Help formatting source file on script load

maxgro — Tue, 11 Feb 2014 22:34:28 GMT

I suppose Rowno() will works as ID in my script but not in the WHERE condition; when you'll try, let me know; thanks

Re: Help formatting source file on script load

Tue, 11 Feb 2014 23:37:57 GMT

Well is there a way to do this without editing the source file? I would like this process to be automated - i.e. not necessary to add an ID column each time new data is received.

Re: Help formatting source file on script load

jaimeaguilar — Wed, 12 Feb 2014 00:29:05 GMT

Just as Massimo Grossi said you can use RowNo() / RecNo() to filter odds and even like this:

Table:

LOAD Field1,

Field2,

from Table

where Even( RecNo() );

you can use even() or odd, depending on which rows you need. Also just to verify the results you can add a calculated field in your table as RecNo() as Field

Regards

Re: Help formatting source file on script load

maxgro — Wed, 12 Feb 2014 08:21:49 GMT

you can drop ID column at the end

or try this

Source:

LOAD * INLINE [

Field_1, Some_Data_1, Some_Data_2

313.212.2112, 123, ABC

Name_1

212.556.9845, 234, THB

Name_2,

234.564.9875, 456, XYZ

Name_3

];

Tab1:

LOAD

if(even(RecNo()), Field_1, null()) as Field_1_Name,

if(not even(RecNo()), Field_1, peek(Field_1)) as Field_1

Resident Source;

Tab:

NoConcatenate load * Resident Tab1 where len(Field_1_Name)>0;

DROP Table Source;

DROP Table Tab1;

Re: Help formatting source file on script load

Wed, 12 Feb 2014 18:08:14 GMT

I ended up loading the data as two separate tables and indicated which lines to pull using a WHERE Odd(RecNo()) clause (along with a few other conditions). After loading each table, I joined them, concatenated the joined table to my main table, and dropped the join table. It's a lot of back-end work, but it will be nice to have this autonomous from now on. Thanks for the help!