³õѧORACLEµÄÀ§»ó
¶Ô³õѧORACLEµÄÈËһʱºÜÄÑ·ÖÇåORACLEÖйØÓÚ“¿Õ¼ä”µÄ¸ÅÄ±ÈÈç±í¿Õ¼ä ÁÙʱ±í¿Õ¼ä Óû§±í¿Õ¼äµÈ£¬¶ÔÓÚÓÉSQLתµ½ORACLEµÄ¾Í¸ü¼Ó»ìÏýÁË£¬ÈÃÈ˸оõORACLE·±Ëö£»·±ËöÔÚÄĶù£¬ÎÒÕûÀíÂÞÁÐÈçÏ£º
1.ORACLE×Ô´ø¹¤¾ß²»Ê®·ÖÒ×Óã»
2.ORACLEµÚÈý·½¹¤¾ßÒ×ÉÏÊÖ£¬µ«ÄÑÉîÈ룻
¶ÔORACLEµÄÁ˽⻹ͣÁôÔÚDDL Óï¾äÉÏ£¬Òò´ËʹÓõÚÈý·½¹¤¾ß¾ÍÖ»ÄÜ“²Â”£¬»ò“BAIDU”£¬ËùÒÔÐèÒª×öÈ«ÃæµÄ¸ÅÄîÀí½â£¬Öð²½ÉîÈ룻
3.ORACLEÓï·¨
³ýÁ˶Աê×¼DDLµÄÁ˽⣬»¹ÐèÒªÁ˽âORACLE DDL·½ÃæµÄ²»Í¬Ö®´¦£¬ÕâÒ²ÊǸöÀ§ÈÅ£»
±ÈÈç ´æ´¢¹ý³ÌÖÐÖ´ÐвéѯÓï¾ä£»
±íÈ磺
TABLE NAME:T
FILEDS:
ID NUMBERIC(8),
NAME VARCHAR2(20)
BIANHAO VARCHAR2(20)
SQL2000ÖпÉÒÔÕâÑùд£º
SELECT * from T WHERE BIANHAO =1234
ORACLEÖÐÐèÒªÕâÑùд£º
SELECT * from T WHERE BIANHAO =to_char('1234')
Ïà¹ØÎĵµ£º
ORACLE±¸·Ý²ßÂÔ(ORACLE BACKUP STRATEGY)
2007Äê11ÔÂ02ÈÕ ÐÇÆÚÎå 16:03
¸ÅÒª
1¡¢Á˽âʲôÊDZ¸·Ý
2¡¢Á˽ⱸ·ÝµÄÖØÒªÐÔ
3¡¢Àí½âÊý¾Ý¿âµÄÁ½ÖÖÔËÐз½Ê½
4¡¢Àí½â²»Í¬µÄ±¸·Ý·½Ê½¼°ÆäÇø±ð
5¡¢Á˽âÕýÈ·µÄ±¸·Ý²ßÂÔ¼°ÆäºÃ´¦
Ò»¡¢Á˽ⱸ·ÝµÄÖØÒªÐÔ
¿ÉÒÔ˵£¬´Ó¼ÆËã»úϵͳ³öÊÀµÄÄÇÌìÆ𣬾ÍÓÐÁ˱¸·ÝÕâ¸ö¸ÅÄ ......
extent--×îС¿Õ¼ä·ÖÅ䵥λ --tablespace management
block --×îСi/oµ¥Î» --segment management
create tablespace james
datafile '/export/home/oracle/oradata/james.dbf'
size 100M ¡¡¡¡¡¡¡¡¡¡¡¡--³õʼµÄÎļþ´óС¡¡
autoextend On¡¡¡¡¡¡¡¡ --×Ô¶¯Ôö³¤
next 10M¡ ......
Êý¾ÝÀàÐÍ
²ÎÊý
ÃèÊö
char(n)
n=1 to 2000×Ö½Ú
¶¨³¤×Ö·û´®£¬n×Ö½Ú³¤£¬Èç¹û²»Ö¸¶¨³¤¶È£¬È±Ê¡Îª1¸ö×Ö½Ú³¤£¨Ò»¸öºº×ÖΪ2×Ö½Ú£©
varchar2(n)
n=1 to 4000×Ö½Ú
¿É±ä³¤µÄ×Ö·û´®£¬¾ßÌ嶨ÒåʱָÃ÷×î´ó³¤¶Èn£¬
ÕâÖÖÊý¾ÝÀàÐÍ¿ÉÒÔ·ÅÊý×Ö¡¢×ÖĸÒÔ¼°ASCIIÂë×Ö·û¼¯(»òÕßEBCDICµÈÊý¾Ý¿âϵͳ½ÓÊܵÄ×Ö·û¼¯±ê×¼)ÖеÄËùÓзûºÅ¡£
Èç¹ ......
ÁÙʱ±íµÄ¸ÅÄ
ÔÚOracleÊý¾Ý¿âÖл¹ÓÐÒ»ÖÖÀàÐÍµÄ±í£¬½Ð×öÁÙʱ±í¡£Õâ¸öÁÙʱ±í¸úÓÀ¾Ã±í×î´óµÄÇø±ð¾ÍÊDZíÖеÄÊý¾Ý²»»áÓÀÔ¶µÄ´æÔÚ¡£µ±Ò»¸ö»á»°½áÊø»òÕßÊÂÎñ½áÊøµÄʱºò£¬Õâ¸öÁÙʱ±íÖеÄÊý¾Ý£¬²»ÓÃÓû§×Ô¼ºÉ¾³ý£¬Êý¾Ý¿â×Ô¼º»á×Ô¶¯Çå³ý¡££¨±íÊÇÈ«¾Ö£¬Ö»ÊÇÊý¾ÝÏûʧ£©
O ......