oracle Data Mining
Executive Overview
The Oracle Data Mining Option provides powerful data mining functionality within the Oracle Database. It enables you to discover new insights hidden in your data and to leverage your investment in Oracle Database technology. With Oracle Data Mining, you can build and apply predictive models that help you target your best customers, develop detailed customer profiles, and find and prevent fraud. Oracle Data Mining helps your company better compete on analytics.
In-Database Data Mining
With Oracle Data Mining, everything occurs in the Oracle Database—in a single, secure, scalable platform for advanced business intelligence. Oracle Data Mining represents a breakthrough in business intelligence. In contrast to traditional statistical software that requires data extraction to separate servers, which may be insecure and costly to maintain, Oracle Data Mining embeds a wide-range of mining functions inside the database—where the data is stored. Coupled with the power of SQL, Oracle Data Mining eliminates data movement and duplication, maintains security and minimizes latency time from raw data to valuable information.
Oracle Data Mining enables you to:
• Leverage your data to discover patterns and valuable new insights
• Build and apply predictive models and embed them into dashboards and applications
• Save money. Oracle Data Mining costs significantly less than traditional statistical software. As an integrated component of your Oracle IT platform, Oracle Data Mining significantly reduces your total cost of ownership.
相关文档:
开发组在数据迁移时,报告发现一些数值为'0000/00/00'的date数据,导致数据迁移失败。
这个问题有点奇怪,因为在Oracle中,date类型的数据的取值范围是从-4712/12/31到9999/12/31之间,并且年份不能为0。也就是说'0000/00/00'是一个非法数据,不为Oracle所接受。
SQL> select to_date('0000-00-00', 'yyyy-mm- ......
1. 创建视图:
CREATE OR REPLACE VIEW SM_V_UNIT_AUTH AS
SELECT T2.UNIT_ID,
T2.SUPER_UNIT_ID,
T1.AUTH_ID,
T1.AUTH_NAME,
T1.A ......
1、select TIMESTAMP'2009-11-03 09:26:50.124' from dual --默认毫秒保存六位
2、此语句只能在服务器端运行,如果执行以下操作,则在插入oracle时,可以直接写nls_date_format设定的格式,但是只能针对一次绘画,如果关掉窗口则失效。
alter session set nls_d ......
游标(CURSOR),很重要
游标:用于处理多行记录的事务
游标是一个指向上下文的句柄(handle)或指针,简单说,游标就是一个指针
1 处理显式游标
显式游标处理需 4个 PL/SQL 步骤,显示游标主要用于处理查询语句
(1) 定义游标
格式: CURSOR cursor_name [(partment[,parameter]...)] IS s ......
DBMS_CHANGE_NOTIFICATION
对象(表)数据更新通知
DBMS_APPLICATION_INFO
设置/读取SESSION APPLICATION信息,操作V$SESSION_LONGOPS
DBMS_ALERT
告警
DBMS_DATAPUMP
数据迁移
DBMS_DB_VERSION
数据库版本定义
DBMS_DDL
Compiles、wrapped、Reorganizes 对象
DBMS_DEBUG
ORACLE DEPL/SQL debugger 工具
DB ......