can we store the result of dynamic query into a variable and use it in if block?
Declare
v_count number
v_sql varchar2(1000);

begin

v_count :='select count(*) from table_name';

 Execute Immediate v_count;

if(v_count <>0) then

v_sql :='delete table_name where x=X' ;

Execute Immediate v_sql ;

End if ;

end;

Declare
v_statement varchar2(32767);
v_count number;
v_sql varchar2(1000);

begin

 v_statement :='select count(*) from table_name';

 Execute Immediate l_statement into v_count;

  if v_count >0 then
   ...
  end if ;

end;