Oracle

(4th number Lock analysis of the unique key constraints) A previous customer suggested that when the insert was hang to live, the problem is likely to be locked. For such a question I usually think of a few common views:

First, the case description After using Rman to back up the database, because the table space was accidentally deleted manually, it is now necessary to use the incomplete recovery to retrieve the tablespaces that were mistakenly deleted. Ii.

As we all know, Microsoft Excel is intuitive and convenient for data entry, statistics, production charts, but its limited data management capabilities, a large number of data query capacity, if the advantages of its data calculation and large

Summary: Describes the characteristics and structure of the ADF and describes the process of developing the Java EE application using the ADF. Keywords: ADF ORACLE java EE MVC Introduction to the ADF The ADF (Application Development framework) is

Today, I was discussing with my friends the following topics: "There is a table on the index, drop the table, and flash back to delete back, excuse me, the index on this table can still use?" If there's a change, what is it? 》 I conducted the

Basic data structure 2.1 Control files The control file contains status information for all other files in the database. The control file contains the following types of data: A. Database information records (one) B. Data file records (one per

Absrtact: By discussing and studying the characteristics and principles of Oracle Server and Client/server, this paper expounds some principles and methods of improving and adjusting the performance of Oracle Application system. Keywords: Oracle;

On the principle of data encryption, you can refer to [data security] to talk about the mathematical principles of cryptography http://blog.csdn.net/u010415792/article/details/9007931. How to encrypt the technology from here, in the understanding of

Oracle used a whole book to illustrate Valut, interested in children's shoes can refer to http://docs.oracle.com/cd/E11882_01/server.112/e23090/toc.htm, I personally think it does not need It is only right to know that there is such a thing as a

There are many ways to track an SQL session in Oracle, which is officially recommended for use in Oracle 11g dbms_monitor. In the actual production environment, try to be careful with this operation, as far as possible to find a specific session ID

Conversion of Oracle database into system Oracle Database conversion:1.16 Binary conversion to 10-system Can be implemented through the To_number function: Select To_number (' 19f ', ' xxx ') from dual;----------------------415Select To_number ('

Novice in writing program, must be adventurousness, and must have patience, do not compromise, do not understand on the book, online search data, ask friends, resolutely carried out in the end. Recently has been with the knowledge of the ASP in the

ORA-00922 missing or invalid option0ra-00922: Missing or invalid option cause An invalid option is specified in defining a column or storage clause. The valid option in specifying a, NOT NULL to specify, the column cannot contain any NULL values.

Oracle The Oracle database system configures its own startup according to the parameters set in the initialization parameter file Init.ora, and each instance reads the different parameters set in these parameter files before starting. The parameters

2. Cross-partitioned access is still a good performance for partitioned tables, because the data is concentrated in 2 partitions or more than the access T1 to access data less ... Sql> SELECT * from t1 where object_id 504448 rows have been

Database fragmentation is a major factor in database performance and should be discovered and defragmented in a timely manner. First, how the debris is produced When a database instance is created, it is divided into multiple logical segments

The isql*plus structure is as follows: The configuration process is as follows: 1 Configuration httpd $ cd $ORACLE_HOME/Apache/Apache/conf $ vi httpd.conf 1.1 设定Server name或者Server IP地址和端口，使用非root用户启动HTTPD进程，其端口必须大于1024， 如： Listen=hpserv01:7777 1

When a WHERE clause uses a function for a column, the Oracle optimizer cannot use the index in the query unless the simple technique is used to force the index. In general, you cannot establish a specific condition on a specified column if you do

If the database is in Noarchivelog mode, we will recover the database from a full offline backup and it is not possible to achieve point-in-time recovery. 1, restore the preparation work If you run the database in Noarchivelog mode and assume that

Oracle 10g R2 supports manually moving databases across platforms, even if these platforms have different mantissa formats (endian format). The mantissa format is related to byte ordering, which has two different formats, the large mantissa and the