Oracle

Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. There are two constraints in Oracle: latency constraint and

Without a third-party tool, how should Oracle be a backup (logical backup )? Previously in this article ArticleSuccess! Now I will tell you the method, of course, for those new users! First, create a batch file databack. BAT as long as two lines

OTL use method 1 source http://otl.sourceforge.net/http://otl.sourceforge.net/otlv4_h.zip () 2 install 2.1 Windows XP, vc6.0, oracle8.1.61) unzip the downloaded installation package to C: /program files/Microsoft Visual Studio/vc98/otlv4_h/otlv4.h. 2

Create or replace procedure createmanageruser as v_certificatenumber nvarchar2 (100); -- ID card number (ID card) v_accessionstate integer; -- active state -- cursor field value (annotation field not used) v_userid varchar2 (40); v_loginname

Oracle 10g Linux Installation notes I. Create a user and a directory 1. Create user group#/Usr/sbin/groupadd oinstall#/Usr/sbin/groupadd DBA2. Create a user and set a password#/Usr/sbin/useradd-G oinstall-g dba Oracle# Passwd Oracle3. Create a

Original article: how to get data from Oracle DB in Silverlight via WCF? From: http://hi.baidu.com/%C7%A7%C0%EF%BA% AE %C9% AB /blog/item/f18b7cc46cfe29dc38db4945.html Bytes ----------------------------------------------------------------------------

1.The system permission unlimited tablespace is an implicit system permission in the DBA and resource roles. When a user obtains the role of DBA or resource,The unlimited tablespace system permission is also implicitly authorized to the user. 2.The

Source: Network/Editor: getting started with programming: Unknown When writing a program, a newbie must be brave and patient. If he doesn't understand it, he must read the book, check the information on the Internet, ask his friends,

  Alter any cluster: modify the permissions of any cluster   Alter any index   Alter any role Modify permissions of any role   Alter any sequence   Alter any snapshot   Alter any table   Alter any trigger   Alter cluster Modify permissions on

1. Set the listener password [mandatory] Setting the listener password can prevent most attacks. This is usually a simple process. You can use LSNRCTL to set a password. The password will be encrypted and stored in the listener. ora file. You can

Arithmetic Operation of NULL: In Oracle, null is considered as an unknown value,Any arithmetic operation that contains NULL values returns NULL.. Therefore, the following select statement returns null:Null String: Oracle treats a null string ('') as

Keywords: Oracle Oracle with statement example WITH a AS (SELECT * FROM bd_member where rownum B AS (SELECT * FROM tp_trade_card)Select A. MEMBER_NAME,B. CARD_NOFrom,BWhere A. BD_MEMBER_ID = B. BD_MEMBER_ID   Google Search: Oracle + with view to get

Oracle8i introduces SYS_GUID, which has many advantages over the traditional sequence used by Oracle administrators. A sequence generator simply creates a series of integers starting from a given starting point, and is used to automatically

Create or replace function udf_weekofyear (v_date in date, formate in varchar2) return charAsV_ret char (6 );V_ret1 char (2 );V_ret3 number;Begin V_ret3: = to_char (v_date, 'iw ');If v_ret3 = 1 and to_char (v_date, 'mm') = '12' then -- determine

1. Block Cleanout description Article arrangement reference: http://www.orawh.com/60.html Block clean out refers to changing the data in a block from dirty to clean. It is equivalent to telling the people behind the block that the data in the block

Oracle memory structure and instance Management 1. Memory Structure: The overall structure of the Oracle database is as follows: Each Oracle database is composed of an Oracle Instance and a database (data file, control file, and redo log file). The

Materialized views are similar to indexes in many aspects: materialized views are used to improve query performance, while materialized views are transparent to applications, adding or deleting materialized views does not affect the correctness and

Part 6 ROWIDROWID is the address of a row in the database. It is used to record some attributes of data storage, including: the data file where the record is stored (file #), the database object (obj #), the data block number (block_no #) and the

Use of ORACLE variable binding In ORACLE, binding variables can reduce hard parsing and improve system performance (note that, normally, not in any situation ). Take the table tabletest as an example

Starting from Oracle Database 10 Gb, Oracle creates a scheduled task named GATHER_STATS_JOB by default after the Database is created, which is used to automatically collect CBO statistics. This automatic task is enabled by default between-on the