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

OracleËùÓа汾»ã×Ü

ÕÒµ½Ò»¸ö½éÉÜoracle°æ±¾µÄÎÄÕ¡£
http://wapedia.mobi/en/Oracle_Database#3. 
¡ö1979: Larry Ellison and friends founded Software Development Laboratories. 
¡ö1979: SDL changed its company-name to "Relational Software, Inc." (RSI) and introduced its product Oracle V2 as an early commercially-available relational database system. The version did not support transactions, but implemented the basic SQL functionality of queries and joins. (RSI never released a version 1 - instead calling the first version version 2 as a marketing gimmick.)[23] 
¡ö1982: RSI in its turn changed its name, becoming known as "Oracle Corporation",[24] to align itself more closely with its flagship product. 
¡ö1983: The company released Oracle version 3, which it had re-written using the C programming language and which supported COMMIT and ROLLBACK functionality for transactions. Version 3 extended platform support from the existing Digital VAX/VMS systems to include Unix environments.[24] 
¡ö1984: Oracle Corporation released Oracle version 4, which supported read-consistency. 
¡ö1985: Oracle Corporation released Oracle version 5, which supported the client-server model — a sign of networks becoming more widely available in the mid-1980s. 
¡ö1986: Oracle version 5.1 started supporting distributed queries. 
¡ö1988: Oracle RDBMS version 6 came out with support for PL/SQL embedded within Oracle Forms v3 (version 6 could not store PL/SQL in the database proper), row-level locking and hot backups.[25] 
¡ö1989: Oracle Corporation entered the application products market and developed its ERP product, (later to become part of the Oracle E-Business Suite), based on the Oracle relational database. 
¡ö1990: the release of Oracle Applications release 8[24] 
¡ö1992: Oracle version 7 appeared with support for referential integrity, stored procedures and triggers. 
¡ö1997: Oracle Corporation released version 8, which supported object-


Ïà¹ØÎĵµ£º

ORACLE¸ÅÒªÎļþ

¼ÇµÃÒÔǰÉÏOCP¿Î³ÌµÄʱºòÄǸöÀÏʦ½ÌÎÒÃÇʹÓÃPROFILEÀ´ÏÞÖÆÓû§µÄһЩ²Ù×÷£¬ÄǸöʱºò¹À¼ÆÊÇÀÏʦ͵ÀÁ°É£¬ËùÓÐʵÑé¶¼ÊÇͨ¹ýOEMµÄÐÎʽÀ´²Ù×÷£¬¸ù±¾²»»áÉæ¼°µ½ÃüÁîÐС£
ƽʱÔÚѧϰORACLEµÄ¹ý³ÌÖкÃÏñÒ²ºÜÉÙÅöµ½¹ØÓÚPROFILEµÄÎÊÌ⣬½ñÌì¹äÒ»¸öÅóÓѵÄBLOGµÄʱºò·¢ÏÖÕâÆªÎÄÕ£¬¾õµÃͦºÃµÄ£¬ÄÚÈݲ»¶à£¬¼ò½àÃ÷ÁË£¬ºÃ´õÒ²ËãÊǸöÃüÁîÐÐ ......

ORACLE ÓαêºÍÓαê±äÁ¿µÄÇø±ð

ÈçºÎ¶¨ÒåÓαêÀàÐÍ
TYPE ref_type_name IS REF CURSOR [RETURN return_type];
ÉùÃ÷Óαê±äÁ¿
cursor_name ref_type_name;
´Ó¼¼Êõµ×²ã¿´£¬Á½ÕßÊÇÏàͬµÄ¡£ÆÕͨplsql cursorÔÚ¶¨ÒåʱÊÇ“¾²Ì¬”µÄ¡£¶øRef cursors¿ÉÒÔ¶¯Ì¬´ò¿ª¡£
ÀýÈçÏÂÃæÀý×Ó£º
Declare
type rc is ref cursor;
cursor c is select * from dual ......

С²¼ÀÏʦoracleÊÓÆµ½²×ù±Ê¼Ç£¨¶þ£©

Oracle Process Structure
Oracle takes advantage of various types of processes:
¡¡—User process: Started at the time a database user requests connection to the Oracle server
  —Server process: Connects to the Oracle instance and is started when a user establishes a session
& ......

oracleÎĵµµÚ¾ÅÕ´¥·¢Æ÷(1)

 µÚ¾ÅÕÂ½Ú :´¥·¢Æ÷±àÂë
    ´¥·¢Æ÷ÊÇ´æ´¢ÔÚÊý¾Ý¿â´æÖÐÒþʽµÄÔËÐлòÕß±»´¥·¢µÄÒ»¶Î³ÌÐò£¬µ±Ä³Ð©Ê¼þ·¢Éú¡£Í¨³£Çé¿öÏ£¬´¥·¢Æ÷ÖÐÖ§³Ö¿ÉÖ´ÐеÄÒ»¶Îpl/sql´úÂë¿é£¬µ±Ò»¸öinsert,update,»òÕßdeleteÃüÃû·¢ÉúÔÚÒ»¸ö±í»òÕßÊÓͼÉϵÄʱºò¡£ÆäÒ²Ö§³ÖϵͳºÍÊý¾Ý¿â»òÕß·½°¸Ê¼þ.oracleÊý¾Ý¿âÒ²Ö§³Ö´¥·¢Æ÷Öк¬Ó ......

OracleÖÐ×éºÏË÷ÒýµÄʹÓÃÏê½â

ÔÚOracleÖпÉÒÔ´´½¨×éºÏË÷Òý£¬¼´Í¬Ê±°üº¬Á½¸ö»òÁ½¸öÒÔÉÏÁеÄË÷Òý¡£ÔÚ×éºÏË÷ÒýµÄʹÓ÷½Ã棬OracleÓÐÒÔÏÂÌØµã£º
    1¡¢ µ±Ê¹ÓûùÓÚ¹æÔòµÄÓÅ»¯Æ÷£¨RBO£©Ê±£¬Ö»Óе±×éºÏË÷ÒýµÄǰµ¼ÁгöÏÖÔÚSQLÓï¾äµÄwhere×Ó¾äÖÐʱ£¬²Å»áʹÓõ½¸ÃË÷Òý£»
    2¡¢ ÔÚʹÓÃOracle9i֮ǰµÄ»ùÓڳɱ¾µÄÓÅ»¯Æ÷£¨CBO£©Ê± ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ