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¡¡¡¡ÔÚCMDÖÐÊäÈëÒÔÏÂÄÚÈÝ:
   C:>lsnrctl
   LSNRCTL for 32-bit Windows: Version 8.1.6.0.0 - Production on 14-3ÔÂ -2003 14:17
   :51(c) Copyright 1998, 1999, Oracle Corporation. All rights reserved.
¡¡¡¡»¶Ó­À´µ½LSNRCTL£¬Çë¼üÈë"help"ÒÔ»ñµÃÐÅÏ¢¡£
¡¡¡¡LSNRCTL> status
¡¡¡¡Á¬½ÓÖÁ(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=robust)(PORT=1521)))
¡¡¡¡TNS-01103: µØÖ·µÄЭÒéרÓÃ×é¼þÖ¸¶¨²»ÕýÈ·
¡¡¡¡TNS-12541: TNS£ºÎÞ¼àÌýÆ÷
¡¡¡¡TNS-12560: TNS£ºÐ­ÒéÊÊÅäÆ÷³öÏÖ´íÎó
¡¡¡¡TNS-00511: ÎÞ¼àÌýÆ÷
¡¡¡¡32-bit Windows Error: 61: Unknown error
¡¡¡¡LSNRCTL> start
¡¡¡¡Æô¶¯tnslsnr£ºÇëÉÔºò...
¡¡¡¡Failed to start service, error 3.
¡¡¡¡TNS-12536: TNS£º¿ÉÄÜ»á×è°­*×÷
¡¡¡¡TNS-12560: TNS£ºÐ­ÒéÊÊÅäÆ÷³öÏÖ´íÎó
¡¡¡¡TNS-00506: *×÷¿ÉÄÜ×èÈû
¡¡¡¡32-bit Windows Error: 997: Unknown error
¶þ¡¢½â¾ö
¡¡¡¡ÐÞ¸Ä listerner.ora(..ora92networkadmin),Îļþ,È·±£ÈçÏÂ:
    LISTENER =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = tiger)(PORT = 1521))
    )
    SID_LIST_LISTENER =
    (SID_LIST =
    (SID_DESC =
    (GLOBAL_DBNAME = ORCL)
    (ORACLE_HOME = E:oracleora92)
    (SID_NAME = ORCL)
    )
    )
Note: ´Ë¶ÎÅäÖÃÒª¸ù¾Ý×Ô¼ºµÄ°²×°ÅäÖöø¶¨, ÎÒµÄÅäÖøüÐÂÈçÏÂ:
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = orcl
      (ORACLE_HOME = F:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
  )
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    &nb


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SQL> desc test;
Name     Type          Nullable Default Comments
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COUNTRY VARCHAR2(20) Y       &nb ......

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substr("ABCDEFG", 0); //·µ»Ø£ºABCDEFG£¬½ØÈ¡ËùÓÐ×Ö·û
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Oracle log files

Oracle log files : An introduction
 
The Oracle server maintains the redo Oracle log files to minimize the loss of data in the Database in case of an uncontrolled shutdown.
Online redo Oracle log files are filled with redo records. A redo record, also called a redo entry, is made up of a gr ......

Oracle ADDM ×Ô¶¯Õï¶Ï¼àÊÓ¹¤¾ß ½éÉÜ


Oracle AWR ½éÉÜ(AWR -- Automatic Workload Repository)
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Oracle For Update ÐÐËø


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