Oracle中的5个问题 - Oracle / 基础和管理
如题:
1.16进制数在转化成10进制数时出错
SQL code:
SQL> select to_char(125,'xxxx') from dual;
TO_CHAR(125,'XXXX')
--------------------------------------------------------------------------------
7d
SQL> select to_char(7d,'xxx') from dual;
TO_CHAR(7.0E+000D,'XXX')
--------------------------------------------------------------------------------
7
SQL> select to_char(to_char(125,'xxxx'),'xxx') from dual;
select to_char(to_char(125,'xxxx'),'xxx') from dual
ORA-01722: 无效数字
2.索引高度是什么一个概念: pga_aggregate_target?
3.analyze index indexname validate structure有什么用？--判断是否需要重建索引?
4.以下代码怎样才能输出“Test successed!”
SQL code:
SQL> set serveroutput on;
SQL> create or replace and compile java source named test_java as
2 public class FirstJava{
3 public static void test(){
4 System.out.println("Test successed!");
5 }
6 };
7 /
Java created
SQL>
SQL> create or replace procedure test_java is
2 language java name 'FirstJava.test()';
3 /
Procedure created
SQL> exec hello;
PL/SQL procedure successfully completed
5.外联接提高表连接的查询速度？
&nb
相关问答：
我有一个表，结构是这样。
转出 单位 转入单位 笔数 金额
date(主) outid(主) inid(主) num amt
2009 1 2 1 500 为 1 单位 在2009� ......
用PL/SQL 登陆时弹出报错窗口，错误如下！
ORA-01034:ORACLE not available
ORA-27101:shared memory realm does not exist
请问，有没有人遇到这种情况，怎么解决？谢谢！
1. Oracle sid 正� ......
做玩data guard 后
在Primary服务器 执行
SQL>SELECT SEQUENCE#,APPLIED from V$ARCHIVED_LOG ORDER BY SEQUENCE#;
SEQUENCE# APP
---------- ---
13 NO
13 YES ......
CREATE OR REPLACE PROCEDURE usp_refreshTopN
IS
BEGIN
--文档
INSERT INTO topnresource(resourceId,title,type,cover,brief,properUser,tag,clickAmount,createDate,topNCreateDate,o ......
oracle函数如下：
create or replace function P_WEB_GETCITYID
(
p_mobileNumber in VARCHAR2,
p_cityid out NUMBER
) Return NUMBER
IS
p_areacode varc ......
