Oracle

Oracle database upgrades are also not simple, and this article gives a more detailed description of Oracle: Oracle database Upgrade or data migration method research I also belong to Oracle's rookie, will not shortcoming introduced. Here's a quick

Oracle Data Dictionary OverviewDatabase is a collection of data, database maintenance and management of this user's data, then where the user data tables, the user's information, where the data storage of these users where the path, this information

The Oracle tutorial you are looking at is: How Oracle runs the OS command directly (bottom). EXEC SQL whenever SQLERROR CONTINUE; SQLGLM (Msg_buffer, &buffer_size, &msg_length); printf ("Daemon error while connecting:\n"); printf ("%.*s\n",

The Oracle tutorial being looked at is: analysis and resolution of Oracle Common error codes (i). In the process of using Oracle, we often encounter errors from Oracle, which may be a bit blurry for beginners, and can be Can not know how to deal

Only know SQL Server support data Bulk INSERT, but Oracle, SQLite and MySQL are also supported, but Oracle needs to use the Orace.dataaccess driver, today put out several database of BULK INSERT solution. First of all, Iprovider has a plug-in

This example describes Oracle's pl/sql. Share to everyone for your reference, specific as follows: First, what is Pl/sql? Pl/sql (procedural language/sql) is an extension of Oracle's standard SQL language. Pl/sql not only allows you to embed SQL

Connection errorafter installation, I log in to the Enterprise background (HTTP://UBUNTU:1158/EM) error, with Sqlplus connection Oracle also error.One, the error encountered is as follows1,ora-12505:tns:listener does not currently know of SID given

1. Execute a SQL script file Copy Code code as follows: Sqlplus User/pass@servicename Or Copy Code code as follows: Sql>start File_names Or Copy Code code as follows: sql>@

Row to Columna table Query results are --row column Select years, (select amount from Tb_amount as A where Month=1 and A.years=tb_amount.years) as M1, (select amount from T B_amount as a where month=2 and a.years=tb_amount.years) as M2,

The Oracle tutorial being looked at is: analysis and resolution of Oracle Common error codes (i). In the process of using Oracle, we often encounter errors from Oracle, which may be a bit blurry for beginners, and can be Can not know how to deal

1.INSERT (Insert the statement into the data sheet) INSERT into table name (field name 1, field Name 2, ...) Values (value 1, value 2, ...);INSERT into table name (field name 1, field Name 2, ...) SELECT (field name 1, field Name 2, ...) from

There are many functions about dates in Oracle, such as: 1,add_months () is used to increase or decrease the number of months from a date value Date_value:=add_months (date_value,number_of_months) Cases: Sql> Select Add_months (sysdate,12) "Next

The following examples illustrate the use of regular expressions to handle problems that are common in some jobs. 1. Regexp_substr The REGEXP_SUBSTR function uses regular expressions to specify the start and end points of the return string, and to

First, overview: Oracle Registration is the registration of the database as a service to the listener. The client does not need to know the name of the database and the instance name, just know the name of the service provided by the database can

One, what is the implementation plan (explain plans) Execution plan: A description of the execution process or access path of a query statement in Oracle. Ii. How to view the execution plan1: Under Pl/sql press F5 to view the execution plan.

In most cases, this dynamically generated SQL query statement is written as follows: Copy Code code as follows: Select a table. field 1,a table. field 2,b table. field returns, C table. field returns from Table A, B table, C table

The data guard provides the following three kinds of protection modes: 1 Maximum protection mode (Maximum Protection)"Maximum protection" here refers to the maximum protection of the data is not lost, that is, at least one standby and primary

The scenario is as follows:--Create a type (type) Create or replace type list_obj is table of number;--create a table structure created by (name VARCHAR2) primary key Che CK (regexp_like (name, ' ^ "[a-z]|[ 0-9]|_) +$ '), ID number not NULL, version_

--Connection Recovery Manager C:\Documents and Settings\mengzhaoliang>rman target/ --Archive Log list rman> list Archivelog all; --Delete archive logs that do not exist for physical files rman> Delete expired Archivelog all; --Delete the archive

A dynamic cursor can traverse a dynamic table,Format: is CURSOR; -- Defining a dynamic cursorcursor name cursor type;If the data of the queried table is different, dynamically changing, this time can be used with dynamic cursors.It is important to