Need help for complex data sort SQL Server

Question

I need help for complex data sort from database. Suppose my data stored in table like this:

Description
--------------
JCB Excavator - ECU P/N: 728/35700
Geo Pri         


        

Answer 1

Here you go

declare @t table(Description varchar(1000))
insert into @t
select 'JCB Excavator - ECU P/N: 728/35700 ' union all
select 'Geo Prism 1995 GEO - ABS #16213899 GEO pump ' union all
select 'Geo Prism 1995 - GEO ABS #16213897 ' union all
select 'Geo Prism 1995 - ABS #16213897 ' union all
select 'Ersatz Airbags, Gurtstrammer und Auto Körper  Teile ' union all
select 'this test JCB pipe & JCB pump ' union all
select 'Wie man BBA reman erreicht'

declare @search_term varchar(100)
set @search_term ='GEO'
select Description from @t
order by len(Description)-len(replace(Description,@search_term,'')) desc

Result

Description
----------------------------------------------------------
Geo Prism 1995 GEO - ABS #16213899 GEO pump 
Geo Prism 1995 - GEO ABS #16213897 
Geo Prism 1995 - ABS #16213897 
Ersatz Airbags, Gurtstrammer und Auto Körper  Teile 
this test JCB pipe & JCB pump 
Wie man BBA reman erreicht
JCB Excavator - ECU P/N: 728/35700 

Answer 2

1. Write a function to tokenize a string into a table of words. eg: How do I split a string so I can access item x?
2. Apply this function to the search string and the description table
3. Join the two results with cross apply; group the results, count and sort.