sql - Join over substring across tables in MSSQL -

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I have a table that contains a column URL and another table with a substrings from that table < P> Table 1 

  id | URL ---------- 1 ... \ aaa_common \ 2 ... \ aaa_qa .. 3 ... \ aaa_test \ Analytics   
 Table 2  
  some id | Compname ----------------- 1 aaa_common 2 aaa_qa 3 aaa_test   
 It is possible to use the use of string functions (charindex and substrings). But is that an easy choice?   
 
 
 You can use this, but it will be a bit of a performance hit.  From table_1 t1 inner join table_2 to t1.url like contact ('%', t2.compname, '%')    T2 to 
 Select

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