Oracle

1 Configuring CDB Instance ParametersConfiguring the instance parameters of CDB is like a normal instance, with the alter SYSTEM setting the initialization parameters, and some database configurations can use the Alterdatabase command.After

Table structure:CREATE TABLE test ( ID varchar2 (+) primary key, name VARCHAR2 (32));Import Java.sql.connection;import Java.sql.preparedstatement;import Java.sql.resultset;import Java.sql.sqlexception;import java.sql.Statement; public class

First select your system version, 32-bit system Select 32-bit, 64-bit system can use 32-bit can also use 64-bit, recommended 64 bits! Oracle Database 11g 2nd edition (11.2.0.1.0) for Microsoft Windows (32-bit)Http://download.oracle.com/otn/nt/oracle1

We often need to migrate data, migrate to more advanced hosts, migrate to remote rooms, migrate to different platforms ...First, Exp/imp: This is the most commonly used the simplest method, is generally based on the application of the owner-level to

Oracle Database Common Queries1, view the table space corresponding data file situation:Sql> SELECTTablespace_name,file_name, BYTES/1024x768/1024x768Mb,autoextensible fromDba_data_files; Tablespace_namefile_nameMB autoextensible----------------------

A developer directly on the database server to do the delete table operating system, from the time of the peak operation, resulting in a long time to execute unresponsive, and then shut down the Sqlplus client, run the DELETE statement again,

Write a journal, and record the problem that bothers you for a long, how to solve it at last. At that time felt the attempt to try, wondering how to solve the problem, and finally solved the ~The correct code is as follows:no title textWhere,

#注意: The Oralce command in the example is in the/home/oracle/oracle/product/10.2.0/db_1/bin directory. #你可以自己修改成自己的目录.A. #dbstart//Start database#dbshut//Close DatabaseB. #emctl start Dbconsole//Open Enterprise Manager#emctl Stop dbconsole//Shut

TablesA table describes an entity such as employees. You define a table with a table name, such as employees, and set of columns. In general, you give each column a name, a data type, and a width when you create the table.1. Ordinary heap table

Talk about demand: This function is similar to the mail function, when the user submits some suggestions and comments on the site, the background will be deposited into the Oracle database. The administrator then logs on to the site and sees

Select Userenv (' language ') from dual;--Modify the Oracle database character set to ZHS16GBK:Sql>conn/as Sysdba;Sql>shutdown immediate;Sql>startup Mount;Sql>alter system enable restricted session;Sql>alter system set

Oracle | PL/SQL Unique index (unique Constraint) usage1 GoalsExamples show how to create, delete, disable, and use uniqueness constraints.2 What is a uniqueness constraint? A uniqueness constraint is a constraint that combines a field in a table or

In recent days has been the problem of oracle-sql, involving a number of things that are not used in peacetime, and therefore here depressed for a long time. Now the problem has been solved, though not perfect. But let's share it with everyone.One

http://blog.csdn.net/hollboy/article/details/7550171 There are many solutions to the syntax of Oracle that do not have an if exists (...), here we first analyze the three commonly used, the last one is recommendedThe first is most commonly used to

As I understand it, Oracle Application Express (APEX) is a set of web rapid development frameworks that are produced by Oracle and rely on Oracle databases. Oracle Apex is a tool used by the author in the actual development work. The author found

PLSQL _ basic series 2 _ grouping function group by/ROLLUP/CUBE, plsqlrollup 2014-11-30 BaoXinjian I. Summary The result set generated by the ROLLUP operator is similar to the result set generated by the CUBE operator.   1. The specific differences

Generate multiple ADDM reports in OracleI have written an article in Oracle to generate AWR reports in batches. We used to monitor AWR reports every day to eliminate performance risks in a timely manner. Now there is another way to generate an ADDM

JDBC reading of Oracle US7ASCII encoding Chinese garbled characters and the use of Chinese Characters in different encodings Database Version: Oracle 10g Character Set: SIMPLIFIED CHINESE_CHINA.US7ASCII JDK: 1.6.0 _ 45 Oracle DRIVER: ojdbc14.jar It

Step-by-step explanation of ORACLE (Lecture 2)1. Common ORACLE Data Types (not commonly used for other types) (1) character type 1. char fixed length, up to 2000 characters. For example, put the first four characters of char (10) 'xiaoming 'and then

Synonym and index in Oracle, oraclesynonym Notes: Oracle-Synonyms-- Use the user name (mode name). Table Name-- Authorization: grant create synonym to test1 (authorized by the system user ))-- PrivateCreate or replace synonym sy_test1 for gcs95.test1