Do you Qualify?- How to use QUALIFY statement

[robert_mika]

What it is used for?

The Qualify statement is used for switching on the qualification of field names, i.e. field names will get the table name as a prefix.’

In situation where we have two (or more) Tables with the same field names:

Product	Payment

The Qualify statement will assign name of the Table to fields:

Remember

• To use the script below the Excel file must be saved in the same folder that your qvd file

        Otherwise you will need to make changes the this path - [Qualify.xlsx]

QUALIFY *;
Product:
LOAD [Serial No],
Category,
Value
FROM
Qualify.xlsx
(ooxml, embedded labels, table is Product);

QUALIFY *;
Payment:
LOAD [Serial No],
Category,
Value
FROM
Qualify.xlsx
(ooxml, embedded labels, table is Payment);

The Outcome:

Table Viewer:

Read only if you need to know more....

If we have not used ‘QUALIFY’ statement in situation as above Qlikview would map both of the Tables with outcome like below:

The end result  -merge of those two Tables is correct only for the “Serial No” fields

The “Value” and “Category” fields although merged is none of use to us.

To fix this we can only Qualify fields that we do not want to associated:

QUALIFY Category,
Value;
Product:
LOAD [Serial No],
Category,
Value
FROM
Qualify.xlsx
(ooxml, embedded labels, table is Product);

QUALIFY Category,
Value;
Payment:
LOAD [Serial No],
Category,
Value
FROM
Qualify.xlsx
(ooxml, embedded labels, table is Payment);

or by using UNQUALIFY statement:

(which works as opposite to QUALIFY)

QUALIFY *;
UNQUALIFY [Serial No];
Product:
LOAD [Serial No],
Category,
Value
FROM
Qualify.xlsx
(ooxml, embedded labels, table is Product);

QUALIFY *;
UNQUALIFY [Serial No];

Payment:
LOAD [Serial No],
Category,
Value
FROM
Qualify.xlsx
(ooxml, embedded labels, table is Payment);

In second example the ‘QUALIFY *’ part will add Table name to all fields and the UNQUALIFY statement will remove those names only from specified fields(this method is very useful if we got large numbers of fields)

Outcome is as below:

Fields:

Table Viewer:

Feeling Qlikngry?

How To /Missing Manual(18 articles)

[#2]

Hi Robert,

Very useful. Looks like the excel file is missing Value '4' showing in the qvw. If so, I can't get my head around as to how it is being loaded in the qvw?

Thanks in advance

[Tanalex]

Simple, informative article.  Extremely helpful.  Thanks robert_mika.

Also, good point by colin_albertto use UNQUALIFY * at the end of an script.

[Anonymous]

very useful

[#5]

Very usefull Robert.

[passionate]

Good and Simplified

[robert_mika]

Thank you

[robert_mika]

Thank you

[Anonymous]

Very useful document.

Thanks a lot.

[Kieli]

Hi guys,

thanks for the post.

Unfortunately, I have a problem with the Qualify statement: whenever I qualify a certain table it is not possible any longer to automatically refresh it. It turns both documents to a "script" and both are no longer connected to my QlikServer. Do you know why?

Thanks for the help!
Elisabeth

[Jayachandra]

Good One for Beginners….