Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

oracle10g SQL ¸ú×Ù

1.¼¤»îSQL¸ú×Ù
   ´Óoracle10gÒÔºóÌṩÁËÐµķ½·¨¼¤»îSQLµÄ¸ú×Ù£¬¼´ÊÇʹÓÃdbms_monitor°üÀ´¿ªÆô»ò¹Ø±ÕSQL¸ú×Ù¡£
   ֮ǰ¾É·½·¨ÊÇʹÓà alter session set events ..  »òÕßʹÓÃdbms_system.set_ev·½Ê½
   ʹÓÃdbms_monitor°ü¿ÉÒÔÔڻỰ£¬¿Í»§¶Ë£¬×é¼þÒÔ¼°Êý¾Ý¿âËĸö²ã¼¶¿ªÆôSQLµÄ¸ú×Ù¡£
   Ö»ÓÐÓµÓÐdba½ÇÉ«µÄÓû§²ÅÄÜÔÊÐíÖ´ÐÐdbms_monitor°ü
   4¸ö²ã´Î¼¶±ðµÄ¼¤»îµ÷Ó÷½·¨£º
    »á »° ¼¶:exec dbms_monitor.session_trace_enable(session_id =>1574,
                        serial_num=>36749,waits=>true,binds=>false);
             ×¢Òâ:ʹÓÃselect *  from v$session where sid=sys_context('userenv','sid');
             »ñµÃsession_idºÍserial
             ¹Ø±ÕÓÃ:
         exec dbms_monitor.session_trace_disable(session_id=>1574,serial_num=>36749)
    ¿Í»§¶Ë¼¶:exec dbms_monitor.cliend_id_trace_enable(
                                 client_id=''JXXXT:Administrator',
                                 waits =>true,binds=>false)
             ×¢Òâ:client_id¼´v$session±íÀïÃæµÄclient_identifier×ֶΣ¬Ä¬ÈÏ´Ë×Ö¶ÎΪ¿Õ,
              ͨ¹ýdba_enabled_traces±í²é¿´ÄÇЩ¿Í»§¶ËÆôÓÃÁËSQL¸ú×Ù
        &nb


Ïà¹ØÎĵµ£º

Oracle µÝ¹é²éѯ

create table tree_table 
(
id number,
pId number,
orderNumber number,
name varchar2(255)
)
select tt.*
from tree_table tt
start with tt.pId = 0
connect by prior tt.id = ttd.pId
order siblings by orderNumber  ......

OracleµÄ°æÈ¨ÉùÃ÷

   
ÒÔÍù´ÓÀ´Ã»ÓÐÏëÈ¥ÈÏÕæ¶ÁÒ»´ÎOracleµÄ°æÈ¨ÉùÃ÷£¬½ñÌì´ò¿ªOracle10gR2µÄÎĵµ£¬ÓÚÊǾÍË÷ÐÔ´ÓÍ·¿ªÊ¼¶ÁÒ»ÏÂÕâÆªÎÄÕ¡£
һЩÎÒÏë´ó¼Ò¶¼Ó¦¸ÃÈ¥ÖªµÀµÄ£¬ËäÈ»¹úÄڵİæÈ¨¸ÅÄîʵÔÚÊDZȽϵ­±¡£¬µ«ÏëÀ´»áÔ½À´Ô½ºÃµÄ¡£
Oracle10g·ÖΪ4¸ö°æ±¾£¬·Ö±ðÊÇ£º
1¡£Oracle Database Standard Edition One£¬×î»ù±¾µÄÉÌÒµ°æ± ......

Oracle´´½¨±í¿Õ¼ä¡¢´´½¨Óû§ÒÔ¼°ÊÚȨ¡¢²é¿´È¨ÏÞ

´´½¨ÁÙʱ±í¿Õ¼ä
CREATE TEMPORARY TABLESPACE test_temp
TEMPFILE 'C:\oracle\product\10.1.0\oradata\orcl\test_temp01.dbf'
SIZE 32M
AUTOEXTEND ON
NEXT 32M MAXSIZE 2048M
EXTENT MANAGEMENT LOCAL;
´´½¨Óû§±í¿Õ¼ä
CREATE TABLESPACE test_data
LOGGING
DATAFILE 'C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL\TE ......

Oracle³£ÓÃÊý¾ÝÀàÐͼò½é

OracleÖÐÌṩһϵÁÐÀàÐÍ£¬Ã¿¸öÀàÐ͵ÄÌØµãÈçÏ£º
char£º´æ´¢¹Ì¶¨³¤¶ÈµÄ×Ö·û£¬Èç¹û×Ö·û³¤¶È²»¹»»áÔÚÓұ߲¹¿Õ¸ñ¡£±ÈÈ磺name char£¨10£©£¬µ±¸øname¸³ÖµÎª'zhangsan'ʱ»áÔÚÓұ߲¹³ä2¸ö¿Õ¸ñ¡£charÀàÐ͵ÄÈÝÁ¿Îª1¡«2000B£¬Ã»ÓÐÖ¸¶¨ÔòĬÈϳ¤¶ÈΪ1¡£
varchar2£º´æ´¢³¤¶È¿É±äµÄ×Ö·û£¬ºÍcharÀàÐ͵IJ»Í¬£¬Ëü²»»á×Ô¶¯²¹³ä¿Õ¸ñ£¬ÇÒ¶¨ÒåÊ ......

SQLÖÐONºÍWHEREÌõ¼þµÄÇø±ð

Êý¾Ý¿âÔÚͨ¹ýÁ¬½ÓÁ½ÕÅ»ò¶àÕűíÀ´·µ»Ø¼Ç¼ʱ£¬¶¼»áÉú³ÉÒ»ÕÅÖмäµÄÁÙʱ±í£¬È»ºóÔÙ½«ÕâÕÅÁÙʱ±í·µ»Ø¸øÓû§¡£
ÔÚʹÓÃleft jionʱ£¬onºÍwhereÌõ¼þµÄÇø±ðÈçÏ£º
1¡¢onÌõ¼þÊÇÔÚÉú³ÉÁÙʱ±íʱʹÓõÄÌõ¼þ£¬Ëü²»¹ÜonÖеÄÌõ¼þÊÇ·ñÎªÕæ£¬¶¼»á·µ»Ø×ó±ß±íÖеļǼ¡£
2¡¢whereÌõ¼þÊÇÔÚÁÙʱ±íÉú³ÉºÃºó£¬ÔÙ¶ÔÁÙʱ±í½øÐйýÂ˵ÄÌõ¼þ¡£ÕâʱÒÑ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ