title: Merge two tables without common column in sql
body: <p>I have two tables A and B. Table A contains field 'number'. Table B contains 'number_start' and 'number_end'. 
  I want to merge these two tables such that final table contains details from both the table where number is between number_start and number_end.</p>
  
  <p>I want to achieve this in redshift /sql. let me know if anyone has some clue.</p>