Oracle EXECUTE IMMEDIATE语句

1.当执行SQL语句时，不要用分号，当执行PL/SQL块时，在其尾部用分号

2.不支持返回多行的查询,使用临时表来存储记录或者用REF cursors.

sample:

1. USING 子句

  declare

    starff varchar2(10) := 'TS00001';

    table_name varchar2(12) := 'TV00001_VIOL';

    periord number := 5;

      begin

          execute immediate 'insert into '||table_name ||' values (:1, ''ORGCODE'',:2)'

           using starff, sysdate+periord;

       commit;

2. INTO子句

  declare

     l_cnt     varchar2(20);

  begin

     execute immediate 'select count(1) from emp'

       into l_cnt;

     dbms_output.put_line(l_cnt);

  end;

3. 传递并检索值

  declare

     l_dept     pls_integer := 20;

     l_nam      varchar2(20);

     l_loc      varchar2(20);

  begin

     execute immediate 'select dname, loc from dept where deptno = :1'

       into l_nam, l_loc

       using l_dept ;

  end;