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delete from tbl_talbe
where (col1,col2,col3) in
(select col1,col2,col3
from tbl_table
group by col1,col2,col3
having count(*)>1)
and rowid not in
(
select max(rowid)
from tbl_table
group by col1,col2,col3
having count(*) >1
)
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Oracle Database 11g A Beginner's Guide
Oracle Database 11g SQL
Oracle Database 11g SQL: Tuning Work Shop
Oracle Database 11g SQL: Tuning Work Shop Practices and Solutions
Oracle Essentials: Oracle D ......
ÔÚ/etc/rc.d/init.d/ ´´½¨oracle10gÎļþ
touch oracle10g
chmod a+x oracle10g
[root@test~]# vi /etc/rc.d/init.d/oracle10g
#!/bin/bash
#chkconfig:345 51 49
#description:starts the oracle database deamons
#
ORACLE_HOME=/oracle/product/10.2.0/db_1
ORACLE_OWNER=oracle
case "$1" in
start)
echo ......
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VARCHAR2(size)£º¿É±ä³¤¶ÈµÄ×Ö·û´®£¬×î´ó³¤¶È4000 bytes£¬¿É×öË÷ÒýµÄ×î´ó³¤¶È749
NCHAR(size)£º¸ù¾Ý×Ö·û¼¯¶ø¶¨µÄ¹Ì¶¨³¤¶È×Ö·û´®£¬×î´ó³¤¶È2000 bytes
NVARCHAR2(size)£º¸ù¾Ý×Ö·û¼¯¶ø¶¨µÄ¿É±ä³¤¶È×Ö·û´®£¬×î´ó³¤¶È4000 byte
LONG£º±ä³¤µÄ×Ö·û´®£¬×î´ó³¤¶ÈÏÞ ......
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2¡¢sqlplus /nolog »òsqlplus system/manager »ò./sqlplus system/manager@ora9i;
3¡¢SQL>connect / as sysdba ;£¨as sysoper£©»ò
connect internal/oracle AS SYSDBA ;(scott/tiger)
conn sys/change_on_install as sysd ......