Oracle

In Windows7, 8 system using Plsqldev query database, found that the Chinese information is garbled, the beginning of the thought is the database import problem. Results the same data in XP under the normal results, in Windows7, 8 results error is

The Oracle Table function was introduced at Oracle9i, which is perfectly compatible with the benefits of view and stored procedures:Application Examples:1.Table () function:Set feedback offcreate or replace type Type_int_date_varchar2 as Object (I

Examples of one-dimensional arrays are:--Created on 2014-5-15 by Administratordeclare TYPE Arr1 is Varray (ten) of number; Tab_1 Arr1; TYPE ARR2 is TABLE of number INDEX by Binary_integer; Tab_2 Arr2; BEGIN -Test statements here

Oracle launches the Times following error after modifying parameters[email protected] >startupORA-00119:INVALID specification for system parameter DISPATCHERSOra-00111:invalid attribute DisppatchersWorkaround1. Create Pfile[email protected] >create

Common scenario: When backing up an Oracle database from a server to a local machine to restore an Oracle database, you often encounter inconsistent database character encoding, you can use the following command to modify the local Oracle Database

Today the SELECT statement found in Oracle can be used with the START with ... The Connect by PRIOR clause implements a recursive query, and connect by is used in structured queries with the basic syntax:Select ... from tablename start with

--Create Tablecreate table Technologycompany (ID VARCHAR2 (+) default sys_guid () not NULL, Flowid VARCHAR2 ( (), Conpanyid number, iscommunication VARCHAR2 (Ten)) tablespace USERS pctfree Initrans 1 Maxtrans 255 Storag E (initial 64K minextents 1

BeanID= "DataSource"class= "Org.apache.commons.dbcp.BasicDataSource" > Propertyname= "Driverclassname"> com.microsoft.sqlserver.jdbc.SQLServerDriver - value>Com.mysql.jdbc.Drivervalue> Property> Propertyname= "url">

1. Set the Sql*plus promptSql> set Sqlprompt "_user ' @ ' _connect_identifier>"[Email protected]>In order to automatically set sqlprompt for all Sql*plus sessions, place the above command in the Glogin.sql file in the Oracle_home/sqlplus/admin

After a long time learning Oracle, so share with you, after reading this article you certainly have a lot of harvest, hope this article can teach you more things. Each step of the Oracle execution plan returns a set of rows that are either used for

First, the problem leads① Suppose that when an online user buys a book, there is an order with an order number of 001 in the database, where a status field is ' valid ', indicating that the order is valid;② Admin to check this 001 order, and see the

--PRIMARY key setting:xx_id number (primary key)1 Createsequence Xx_seq--sequence name2Increment by 1--Add a few each time3Start with 1--Counting starting from 14 Nomaxvalue--nomaxvalue--not set maximum value5 Order 6 nocycle--keep

ILife's blogHttp://blog.csdn.net/fei1502816 Recently just learned oracle11g, after installation is complete directly use, today with PLSQL link suddenly reported an error, the error code is: ORA-12514: The Listener is currently unable to identify

Reference: NoSQL databases have been released.I. Key Value StorageIts data is stored in the form of key values. Although its speed is very fast, it can only obtain data through completely consistent query of keys, data can be saved in either

Preparation: Confirm that the object and statement can be supported by standby Ensure that the rows of each table in the primary database can be uniquely identified. Environment: Operating System: red hat linux enterprise 5 ORACLE:

There are several scanning methods in oracle 10 Gb. Note that the last scanning method does not take partitions when calculating the partition columns, this is the same as the calculation of index columns, resulting in the failure to use indexes. --

Oracle transaction isolation levelSituations caused by different transactions:Dirty read (Dirty reads)A dirty read occurs when one transaction reads the changes that have not been committed by another transaction.Many databases allow dirty reads to

When calling the dynamic performance view related to Oracle in a process, package, function, or trigger, you must grant appropriate permissions. Otherwise, you will receive an error message indicating that the table and view do not exist. Even if

Character Functions1. ASCII (x) and chr (x)ASCII (x): returns the ASCII code of character x.Chr (x): returns characters with an ASCII code of x.2. concat (x, y)Used to add y to x, same as |3. initcap (x)Converts the first letter of each word in x to

Copy codeThe Code is as follows:Create or replace Function GetInvitationNO (prev varchar2, num1 varchar2, num2 varchar2, sessionSetting varchar2) Return Varchar2 Authid Current_User Is PRAGMA AUTONOMOUS_TRANSACTION; -- you must use the "Current_User"