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  declare
  begin
   --SQLÓï¾ä
   --Ö±½ÓдµÄSQLÓï¾ä(DML/TCL)
   --¼ä½Óдexecute immediate <DDL/DCLÃüÁî×Ö·û´®>
   --select Óï¾ä
        <1>±ØÐë´øÓÐinto×Ó¾ä
         select empno into eno from emp
           where empno =7369;
        <2>Ö»Äܲ鵽һÐÐ**********
        <3>×ֶθöÊý±ØÐëºÍ±äÁ¿µÄ¸öÊýÒ»ÖÂ
  exception
    --Òì³£
    when <Òì³£Ãû×Ö> then --ÌØ¶¨Òì³£
        <´¦ÀíÓï¾ä>
    when others then  --ËùÓÐÒì³£¶¼¿É²¶»ñ
        <´¦ÀíÓï¾ä>   
  end;
<Àý×Ó>
   ±àд³ÌÐò ÏòDEPT±íÖвåÈëÒ»Ìõ¼Ç¼£¬
   ´Ó¼üÅÌÊäÈëÊý¾Ý£¬Èç¹û
      Êý¾ÝÀàÐÍÊäÈë´íÎóÒªÓÐÌáʾ
      ÎÞ·¨²åÈë¼Ç¼ Ò²ÒªÓÐÌáʾ
      Ö»ÄÜÊäÈëÕýÊý,Èç¹ûÓиºÊýÌáʾ
   declare
    n number;
    no dept.deptno%type;
    nm dept.dname%type;
    lc dept.loc%type;
    exp exception;   --Òì³£µÄ±äÁ¿
    exp1 exception;
    num number:=0;  --¼ÆÊýÆ÷
    pragma exception_init(exp,-1); --Ô¤¶¨ÒåÓï¾ä
         --(-1´íÎóºÍÒì³£±äÁ¿¹ØÁª)
    pragma exception_init(exp1,-1476);
    e1 exception; --×Ô¶¨ÒåÒì³£±äÁ¿
   begin
    --ÊäÈëÖµ
     no := '&±àºÅ';
     num := num + 1;
     if no < 0 then
        raise e1;    --×Ô¶¨ÒåÒì³£µÄÒý·¢
&


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Introduction to Oracle Wait Interface notes

     ÎÄÕÂÌáµ½£¬ÓÃCache hit ratioµÄ·½·¨À´¼ì²éORACLEÐÔÄÜÎÊÌâ¹ýʱÁË£¬ÀïÃæÓоä·Ç³£ÐÎÏóµÄ»°£ºÕâÎÞÒìÓÚÒ»¸öÒ½ÉúÖ»ÖªµÀ¸ù¾ÝѪѹµÄÀ´ÖÎÁƲ¡ÈË£¬¶ø²¡ÈËÓÉÓÚÌÛÍ´£¬Éñ¾­ÐË·Ü£¬ÑªÑ¹ÔÚÒ»¸öºÏÀíµÄ·¶Î§ÄÚ£¬Ò½ÉúÈ´¸æËß»¼Õߣ¬Äãû²¡£¬µÈÄãѪѹµÍµÄʱºòÔÙÀ´¡£Í¬ÑùµÄ£¬ÎÒÃDz»Äܽö½ö¸ù¾ÝCache hit ratioÀ´ÅжÏORACLEÊ ......

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