title: remove space between character oracle
body: <p>I have a column name 'phone' in table branch_dum. however the values in phone column like </p>
  
  <p>'111 21 111111'</p>
  
  <p>'11 1222 11222'</p>
  
  <p>there are space between numbers. I would like to change my phone column values without any space like</p>
  
  <p>'11121111111'</p>
  
  <p>'11222211222'</p>
  
  <p>what sql command I can write in oracle to replace my column values without any space between character. </p>