Oracle

1, the establishment of ordinary tables 02:25:59 sql> CREATE TABLE Deparment ( 02:26:52 2 Deptno Number (4), Dname varchar2 (M), loc varchar2 (12)) 02:27:22 3 pctfree pctused tablespace users01 02:27:45 4 Storage (minextents 3); Table created.

1, the concept of the table Table is the basic unit of database data storage, it corresponds to the object of real world. 2, the function of the table Basic unit for storing and managing data (two-dimensional table: with rows and columns) 3, the

There are two ways to create the undo Talespace: (1) Create the undo tablespace when the database is created; (2) created in a database that already exists. Database objects cannot be created in the undo tablespace because this tablespace is

1, the concept of the index An index is a database object that is used to speed up data access. Reasonable use of indexes can greatly reduce I/o times. 2, the function of the index: The record is sorted, speed up the query speed of the table. 3,

1, Grant object permissions is the right to access other user scenario objects. GRANT Object_priv|all [(columns)] On object to {user|role| public} [with GRANT OPTION]; All: Permissions for all objects Public: Grant to all users With GRANT

1, the concept of authority Permissions (privilege) are rights that execute specific types of SQL commands or access other schema objects, including system permissions and object permissions. 2, the Classification of authority 1 system privilege

Recently encountered a project, is to install Oracle 9i RAC on AIX5.3, to tell the truth, Oracle I have no contact, I am also stepped. Feel like the XSM project that implemented AS400. Helpless, download the N-Redbook began to study, and finally got

The materialized view of Oracle is a database pair that includes a query result, which is a local copy of the remote data, or is used to generate a summary table based on the sum of the data tables. Materialized views store data that is based on

This article describes in detail the Oracle 11G failure to connect to the database instance troubleshooting ORACLE 11G If the report--enterprise Manager is unable to connect to the database instance, you can troubleshoot the problem by following

As mentioned in parts 1th and 2nd, there are several relatively easy steps to improve performance you can take, one of these steps involves using an automated tool to "guide" you to write SQL statements, there are many production performance

Oracle Trace Files Oracle trace files are grouped into three categories: One is the background alarm log file that records the activity of the background process during startup, shutdown, and running of the database, such as table space creation,

Oracle Scheduler is a job for managing and scheduling databases, allowing many regular database tasks to be automated, reducing human intervention, freeing labor, and essentially, it's crontab with Linux, business Mission management software like

Oracle I am here to provide you with an example of using PHP to manipulate BLOB fields, hoping to help! This example is to store the image files uploaded by the user in a BLOB. Suppose you have a table with the following structure: CREATE TABLE

Considerations for mysql|oracle| program MySQL to Oracle program migration 2001-09 There are many application projects, just started with the MySQL database can basically achieve a variety of functional requirements, with the increase in

Js|oracle JSP is connected to Oracle through JDBC Environment variables (System variables) Java_home = C:\JDK1.3Tomcat_home = C:\TOMCAT-3.2.3ClassPath = D:\Oracle\Ora81\jdbc\lib\classes12.zip (JDBC driver) Second, test procedures String

"NetEase Science and Technology News" JULY 3 According to Reuters, sources said Oracle's acquisition of Sun Microsystems's deal will be presented to the EU this month, and accept the antitrust sector investigation. Oracle is now the world's

"Sina Science and Technology," Beijing time July 3 morning news, according to AFP in Thursday, in the recession led to a decline in net profit, Oracle plans to cut the European region up to 1000 employees, accounting for about 1% of the total number

Historically, Oracle's import and export capabilities have used disk files as storage intermediaries for unloading and reloading databases. The way to "swap files" for larger databases is a big problem. Because a large file will exceed the operating

1. Re-create initialization files, important parameters

The SQL Tuning toolset (SQL Tuning set,sts) is an integral part of the Oracle 10g SQL Tuning Advisor feature. Each tuning toolset contains one or several SQL statements, as well as the contextual information needed to properly interpret them. SQL