How to escape the ampersand character while using sed

Question

I want to replace all single quotes in a string with two single quotes using sed. But when the string contains the & character, the sed command is not repla

Answer 1

It's working for me

bash>echo "'This is a string with 'single quote' & '&'" | sed "s/'/''/g"
''This is a string with ''single quote'' & ''&''