SQL - Get numbers from string after a pound (#) sign

I am attempting to get numbers from a string in SQL Server 2012 that are located after a pound (#) sign and before any spaces that follow. For instance, store numbers. Let's say we have the following:

Big Box Store #450
Big Box Store #768
Little Shop #2
Widgets Warehouse #678
Little Shop #5
Widgets Warehouse #559
Corner Boutiques #32 *CLOSED
Corner Boutiques #67 *CLOSED
Corner Boutiques #12
Buy More #1047 SUPERSTORE
1 Stop Shop #3
1 Stop Shop #17
You 2 Me #16

I would return the following: 450, 768, 2, 678, 5, 559, 32, 67, 12, 1047, 3, 17, 16.

As you can see, not all of the strings have numbers at the very end. Some of them even have a numerical character in the name of the store. I figure the best way of going about this is just to extract the numbers following the pound sign.

Is there a way to do this? I've looked at the following articles:

Query to get only numbers from a string

https://www.sqlservercentral.com/Forums/Topic456023-338-1.aspx

It seems like PATINDEX may be good to use, but I am unsure as what I've tried thus far doesn't return expected results.

Many thanks!

Solution

Another similar way... using test data from Tyron. This works even if there isn't a space after the digits.

DECLARE @t TABLE(
  MyString NVARCHAR(1000)
);

INSERT INTO @t VALUES 
 ('Big Box Store #450')
,('Big Box Store #768')
,('Little Shop #2')
,('Widgets Warehouse #678')
,('Little Shop #5')
,('Widgets Warehouse #559')
,('Corner Boutiques #32*CLOSED')    --notice no space here
,('Corner Boutiques #67 *CLOSED')
,('Corner Boutiques #12')
,('Buy More #1047 SUPERSTORE')
,('1 Stop Shop #3')
,('1 Stop Shop #17')
,('You 2 Me #16');

select
    SUBSTRING(MyString,CHARINDEX('#',MyString,0) + 1,case when PATINDEX('%[^0-9]%',RIGHT(MyString,LEN(MyString) - CHARINDEX('#',MyString,0))) = 0 then 99 else PATINDEX('%[^0-9]%',RIGHT(MyString,LEN(MyString) - CHARINDEX('#',MyString,0))) - 1 end)
    --char version...
   ,SUBSTRING(MyString,CHARINDEX('#',MyString,0) + 1,case when PATINDEX('%[^0-9]%',substring(MyString,CHARINDEX('#',MyString,0) + 1,LEN(MyString) - CHARINDEX('#',MyString,0) + 1)) = 0 then 99 else PATINDEX('%[^0-9]%',substring(MyString,CHARINDEX('#',MyString,0) + 1,LEN(MyString) - CHARINDEX('#',MyString,0) + 1)) - 1 end)

from
    @t