Subfield

[upaliwije]

Hi Friends

In may data table the following field exits

BANK_BRANCH

7287-001

7287-030

7287-050

7268-001

7750-005

if(SUBFIELD(BANK_BRANCH,1,4)='7287','SEYLAN','OTHERS')AS  BANK,

I have written above syntax and but in the results Retrun 'OTHERS' for  record. Pls tell where I am wrong

[Anonymous · Accepted solution]

Hi,

It should be

if(SUBFIELD(BANK_BRANCH,'-',1)='7287','SEYLAN','OTHERS')AS  BANK

Regards,

Greeshma

[PrashantSangle]

Hi,

Your subfield Syntax is wrong

try like

if(SUBFIELD(BANK_BRANCH,'-',1)='7287','SEYLAN','OTHERS')AS  BANK,

Regards

[CELAMBARASAN]

You should give the separator, its not like the mid function

if(SUBFIELD(BANK_BRANCH, '-',1)='7287', 'SEYLAN', 'OTHERS') AS  BANK

Regards,

Celambarasan

[upaliwije]

Thanks all Can you please explain me why syntax is written as below

BANK_BRANCH,'-',1

[PrashantSangle]

See in Help Menu

You will get very good explanation of Subfield()

Regards

[CELAMBARASAN]

Whatever function you came through in qlikview is well explained in QlikView help itself

From Help file

subfield(s, 'delimiter' [ , index ] )

In its three-parameter version, this script function returns a given substring from a larger string s with delimiter 'delimiter'. index is an optional integer denoting which of the substrings should be returned. If index is omitted when subfield is used in a field expression in a load statement, the subfield function will cause the load statement to automatically generate one full record of input data for each substring that can be found in s.

In its two-parameter version, the subfield function generates one record for each substring that can be taken from a larger string s with the delimiter 'delimiter'. If several subfield functions are used in the same load statement, the Cartesian product of all combinations will be generated.

Examples:

(For three parameters)

subfield(S, ';' ,2) returns 'cde' if S is 'abc;cde;efg'

subfield(S, ';' ,1) returns NULL if S is an empty string

subfield(S, ';' ,1) returns an empty string if S is ';'

[subhash_gherade]

SubField - script and chart function

Subfield() is used to extract substring components from a parent string field, where the original record fields consist of two or more parts separated by a delimiter.

The Subfield() function can be used, for example, to extract first name and surname from a list of records consisting of full names, the component parts of a path name, or for extracting data from comma-separated tables.

If you use the Subfield() function in a LOAD statement with the optional field_no parameter left out, one full record will be generated for each substring. If several fields are loaded using Subfield() the Cartesian products of all combinations are created.

Syntax:

SubField(text, delimiter[, field_no ])

Return data type: string

Arguments:

Argument	Description
text	The original string. This can be a hard-coded text, a variable, a dollar-sign expansion, or another expression.
delimiter	A character within the input text that divides the string into component parts.
field_no	The optional third argument is an integer that specifies which of the substrings of the parent string text is to be returned. Use the value 1 to return the first substring, 2 to return the second substring, and so on. A negative value causes the substring to be extracted from the right-hand side of the string. That is, the string search is from right to left, instead of left to right, if field_no is a positive value.

SubField() can be used instead of using complex combinations of functions such as Len(), Right(), Left(), Mid(), and other string functions.

Examples and results:

Example	Result
SubField(S, ';' ,2)	Returns 'cde' if S is 'abc;cde;efg'.
SubField(S, ';' ,1)	Returns NULL if S is an empty string.
SubField(S, ';' ,1)	Returns an empty string if S is ';'.
Add the example script to your app and run it. Then add, at least, the fields listed in the results column to a sheet in your app to see the result. FullName: LOAD * inline [ Name 'Dave Owen' 'Joe Tem' ]; SepNames: Load Name, SubField(Name, ' ',1) as FirstName, SubField(Name, ' ',-1) as Surname Resident FullName; Drop Table FullName;	Name FirstName Surname Dave Owen Dave Owen Joe Tem Joe Tem
Suppose you have a variable that holds a path name vMyPath, Set vMyPath=\Users\ext_jrb\Documents\Qlik\Sense\Apps;.	In a text & image chart, you can add a measure such as: SubField(vMyPath, '\',-3), which results in 'Qlik', because it is the substring third from the right-hand end of the variable vMyPath.
This example shows how using multiple instances of the Subfield() function, each with the field_no parameter left out, from within the same LOADstatement creates Cartesian products of all combinations. The DISTINCT option is used to avoid creating duplicate record. Add the example script to your app and run it. Then add, at least, the fields listed in the results column to a sheet in your app to see the result. LOAD DISTINCT Instrument, SubField(Player,',') as Player, SubField(Project,',') as Project; Load * inline [ Instrument|Player|Project Guitar|Neil,Mike|Music,Video Guitar|Neil|Music,OST Synth|Neil,Jen|Music,Video,OST Synth|Jo|Music Guitar|Neil,Mike|Music,OST ] (delimiter is '|');	Instrument Player Project Guitar Mike Music Guitar Mike Video Guitar Mike OST Guitar Neil Music Guitar Neil Video Guitar Neil OST Synth Jen Music Synth Jen Video Synth Jen OST Synth Jo Music Synth Neil Music Synth Neil Video Synth Neil OST

https://help.qlik.com/en-US/sense/September2017/Subsystems/Hub/Content/Scripting/StringFunctions/RTr...

[arnauayuso]

How do I use this syntax if my data has not a delimeter?

Ex: 5F14GZ --> I want to extract 5F1

Thank you

[khadar]

In this case youcan use  either  MID 0r Left function.

MID('5F14GZ','1','3') =Return  5F1

Left('5F14GZ',3) == 5F1