REPLACE() whit a inverted commas

Question

Hi All
How do I use the Replace() function to replace inverted commas ( “ ) character in a string .
I tried to update:
UPDATE tmp_pos
SET address = REPLACE(address,'"');
But it not updates anything .

Answer 1

Use '''' in place of '''
SQL> var a varchar2(30)
SQL> exec :a := 'abcd "x"  ';
PL/SQL procedure successfully completed.
SQL>  print :a
A
abcd "x"
SQL> select :a from dual;
:A
abcd "x"
SQL> select replace(:a, '"',''') from dual;
ERROR:
ORA-01756: quoted string not properly terminated
SQL> select replace(:a, '"' ,'''' ) from dual;
REPLACE(:A,'"','''')
abcd 'x'