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Oracle ´æ´¢¹ý³ÌÖÐʹÓÃcursor Óαê±éÀúÊý¾Ý

 Ïȶ¨ÒåÒ»¸öcursor:
Procedure  P_MYPROC (
                                    PI_PARAM VARCHAR2
)IS
VI_A    VARCHAR2(10):='';
VI_B    VARCHAR2(20):='';
VI_C    VARCHAR2(30):='';
 --¶¨Òå
 CURSOR MYCUR IS
        SELECE T.A ,T.B, T.C
        from TBL_MYTABLE T;
BEGIN
     --´ò¿ª
     OPEN MYCUR;
     --±éÀú
     LOOP
         FETCH MYCUR
         INTO VI_A,VI_B,VI_C;
        
         --ÎÞÊý¾ÝʱÍ˳ö
         EXIT WHEN MYCUR%NOTFOUND;
          --DO SOMETHING HERE;
     END LOOP;
END P_MYPROC;


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oracle ±íÐÅÏ¢

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ORACLE parent latchºÍchildren latch

         About parent vs child latches. There is no fundamental low level difference between parent and child latches, they are all small regions of memory modified with atomic test-and-set style opcodes.
You see parent (and solitary) latches from x$ksll ......

OracleµÄ·ÖÒ³ÏÔʾ

 Õâ¸öOracleµÄ·ÖÒ³ÏÔʾ¾Ý˵ÊÇ×îÂé·³µÄ£¨MySQL×î¼òµ¥£©£¬µ«ÊÇÕâ¸ö·ÖÒ³ÏÔʾºÜÓÐÓá£ÏÖÔںܶàÍøÕ¾ÉϵÄÌõÄ¿¶¼·Ç³£¶à£¬ÀýÈçÐÂÎÅ£¬¿ÉÄܾ͸ոüеľÍÓÐÉÏ°ÙÌõ£¬ÔÙ¼ÓÉÏÒÔÇ°µÄ£¬Ò»ÕÅÒ³Ãæ¿Ï¶¨¾ÍÊǷŲ»ÏÂÁË£¬ËùÒÔ·ÖÒ³µÄºÃ´¦¾ÍÊÇ¿ÉÒÔ½â¾öÕâ¸öÎÊÌâ¡£
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 select d.code,d.name, sum(w.weight) weight,round(avg(w.price),2) price,sum(w.money) money
from weight_info w left outer join t_dict d on w.productcode=d.code left outer  join t_balancecode b on w.balancecode=b.balancecode where 1=1 and w.operdate>TO_TIMESTAMP('2009-11-2 04:12:32.0', ' ......
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