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Advocate II
Advocate II

Microsoft Flow ( Remove String from Numbers )



I want to design a flow which when a new email arrives in my inbox, I want to parse the string from the email subject and keep only the numbers to be inserted using sql server.
For example :

(rjyrug76745jhjghfr) want only the numbers (76745)

or (uifiry77rjghrff87876) want only the numbers (7787876).



Super User III
Super User III

Hi @wsobhi,


The best way is define a function in SQL and extract the number from the string

Microsoft doc


If you want to do via flow then you need to define an Azure function and put the extract logic.

Then call the Azure function from flow


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Kudo Kingpin
Kudo Kingpin

Hi @wsobhi,

That is definately possible but a bit tricky.


Big picture of your algorythm is following:

1. iterate throughout each character in a string

2. if character is a number add it to an output collection


For part 1:

- create counter variable = 0

create outputString variable = ""

- use Do Until action counter = length of your string (use length function for that)

- take next character using following function: 
substring(<YOUR STRING HERE>,variables('counter'),1)


For part 2: 

- use if action with following: int(<above function) = true

- use action Append to string variable

Once your algorythm exit Do Until loop the outputString variable will contains your numbers
If my reply helps you please mark it as Solution so others can find it easier

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