Oracle

Importing and exporting Oracle Data imp/exp is equivalent to restoring and backing up ORACLE data. The exp command can export data from the remote database server to the local DMP file, and the IMP command can import the DMP file from the local to

Data concurrency means that many users can access data at the same time. Data Consistency means that the data seen by each user is consistent, including the changes made to data by the current user transaction and other user transactions. Data

Recently I am working on a small project using spring + hibernat. I just learned how to do it.I often encounter some minor problems. This time I used DB browser in myeclipse to connect to the Oracle database. Below is the source image of my

In the actual working environment, many people always need to change the IP address frequently to adapt to the customer's environment. However, after the IP address is changed, Oracle cannot start at 10 Gb. Technology related to online

  When I arrived at the company, I received a friend's message saying that one node of RAC had crashed. Because he re-built an index at last night and ran for more than two hours before it was over, then he manually canceled it. At, one of the nodes

The connection pool for accessing the Oracle database in WebLogic can be configured in three JDBC methods. Set up the connection pool in the Weblogic console and modify the startweblogic. CMD file. The connection pool for accessing the Oracle

1. Create the original table and Data SQL> Create Table T1 (ID number, name varchar2 (20 )); Table created SQL> insert into T1 values (1, 'A '); 1 row inserted SQL> insert into T1 values (1, 'B '); 1 row inserted SQL> insert into T1 values (2, 'C ');

After I log on with Scott/tiger and create a table, I will insert data, prompting that I have successfully inserted the table, but there is no record when querying the data, the reason is that my Scott user does not have the permission to insert

1. Export the database test completely, and the username System Password Manager is exported to D: daochu. dmp. Exp system/manager @ test file = D: daochu. dmp full = y 2. Export the tables of system users and SYS users in the database Exp

Ott is a very important tool in OCI to access object-type data. It maps object types or geometric objects in the database into structures in C language for OCI programs. In all operating systems that support Oracle, The OTT tool works as a command

Common Oracle commands and recently used Problems [Problem and background]1. delete a table? A library?Drop table table_name;Drop table database_name;2. Delete all data of a user?It is best to stop the database first and shutdown immediate;

Filter-type local range scan During daily application development, you often encounter the need to determine whether a set that meets certain query conditions exists. In fact, this operation is essentially a special filtering operation, which

The following SQL statements include: Create a table and specify the tablespace Add Table remarks add field remarks Add Constraints Add Index Assign and revoke permissions   -- Create TableCreate Table user name. Table Name(Field 1 number (19) not

This section describes how to use the alter table statement to modify a table. The alter table statement can execute the following tasks: 1. Add, modify, or delete Columns 2. add or delete Constraints 3. enable or disable Constraints 1. Add a column

From today on, I will also enter the ranks of oracle. Oracle has always had a sense of reverence. Oracle is always different from other databases. Maybe it was because I was scared by the teacher during my freshman year. I tried it a little today.

I have previously installed a database named 10.1.0. After deleting the database named 10.1.0 and re-installing the database named 10.2.0, I started oracleoradb10g_home1tnslistener and reported an error. Error: --------------------------- services --

An index is a database object used to accelerate database queries. The principle is to reduce the IO operations of the query to accelerate. Index types:• Clustered index: sort and store the data rows according to the key values of the data rows in

Search for invalid objectsYou can use the following method to compile invalid objects in your database based on the query results. COLUMN object_name FORMAT A30 SELECT owner, object_type, object_name, STATUS FROM dba_objects WHERE STATUS = 'INVALID'

To test the robustness of the application, Deliberately interrupt the Pro * C program that is normally connected, so as to observe their performance. The test method is as follows: 1. When compiling the Pro * C application, add cpool = No or cpool =

The first attempt to use the Oracle database today is indeed worth some twists and turns, but it is really hard to work in only one environment. I am used to SQL Server. Although SQL Server is used for addition, deletion, modification, and query, it