動態SQL execute immediate

declare immediateSQL
  lv_sql varchar2(1000);
  lv_branch varchar2(8);
begin

--1
  lv_branch := '100';
  lv_sql := 'insert into t_emp(id, name)'
    || 'select id, name from tmp_emp where branch = ''' || lv_branch || '''';
  execute immediate lv_sql;
--2
  execute immediate '
    insert into t_emp(id, name)
    select id, name from tmp_emp where branch = :branch
    '
    using lv_branch;
end;