weblogic下在Oracle中存储clob类型一例
String sql = "select t.FILE_INFO from T_FILE_DB_DETAIL t where t.id= "
+ fileDBUpDownDetail.getId() + " for update";
rs = stmt.executeQuery(sql);
if (rs.next()) {
// 在weblogic下部署时，需要更改为Bea WebLogic BLOB格式
// weblogic.jdbc.vendor.oracle.OracleThinBlob blob = (weblogic.jdbc.vendor.oracle.OracleThinBlob) rs
// .getBlob(1);
BLOB blob = (BLOB) rs.getBlob(1);
if (blob != null) {
out = blob.getBinaryOutputStream();
byte[] buf = new byte[8192];// 8K 缓存
int len;
while ((len = fileInputStream.read(buf)) > 0) {
if (out != null) {
out.write(buf, 0, len);
out.flush();
}
}
}
}
相关文档：
软件: VMware Workstation 6.0.2 build-59824
10201_database_linux32.zip
rhel.5.0.server.centoschina.com.dvd.iso
文档:ORACLE10G官方安装文档 B19306_01_Oracle10gR2.chm
参考:周炯老师的ORACLE10G OCP视频(讲的真的 ......
1：以一个DBA身分的用户登陆，打开一个命令窗口。执行命令
SELECT /*+ rule */ s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
from v$session s,v$lock l,dba_objects o
WHERE ......
/*sum()over()*/
--默认计算所有行的合计
select t.empno,t.ename,t.sal,t.deptno,sum(t.sal)over()
from scott.emp t;
--partition by分组合计
select t.empno,t.ename,t.sal,t.deptno,
sum(t.sal)over(partition by t.deptno)
from scott.emp t
order by t.deptno,t.sal;
......
alter system kill session '查出的sid,查出的serial#';
通過數據字典V$SESSION與V$LOCK來瞭解正在等待鎖資源的用戶
select a.username,a.sid,a.serial#,b.id1 from v$session a ,v$lock b
Where a.lockwait ......
