Oracle

Using Xshell to connect to a remote Linux database server, when you switch to the Sqlplus console, when you enter an incorrect character, the ^h is displayed when you use the fallback key to modify it.Workaround:$ stty Erase ^h: The setting

Recently encountered a more common problem, each row of records need to accumulate sum. These problems are not how difficult, mainly in the process of work will often encounter, especially Oracle's own some of the functions can also be a good

One. The following describes the curd operation of the Oracle Database operations column--Student Tables studentcreate table STUDENT ( ID number) not NULL, NAME VARCHAR2, NO VARCHAR2 (12), Age number (3));Two. modifying table

Turn the notes of a great God.The following statements can be used to query the 11g alarm log storage path:--Show the location of the Diagnostic_dest1.show parameter diagnostic_dest; --Querying the directory of XML files2.select value from

First, IntroductionA view is a virtual table whose contents are defined by a query, which, like a real table, contains a series of column and row data with names. However, the view does not exist in the database as a stored set of data values. Row

In Oracle, because there is no top keyword, the paging code in SQL Server does not apply to Oracle, so how do you implement paging in Oracle?--Query all dataStuno stuname stuage stuid Stuseaat ------ -------------------- ---------- ---------- -------

First, IntroductionA role is a collection of commands related to permissions, and the primary purpose of using roles is to simplify the management of permissions.Assume that there are user a,b,c in order for them to have the following permissions1.

First, management index-Principle IntroductionAn index is a data object used to speed up data access. Proper use of indexes can significantly reduce I/O times and thus improve data access performance. There are many kinds of indexes we mainly

1. RDBA (tablespace relative database block address)is the relative data block address, is the address of the data, RDBA can be rowid in rfile#+block#.Get file# and block# based on RDBA, using 10 binary RDBASELECT

Error when creating a new library using DBCA:To view resource status:$ crsctl Stat res-t--------------------------------------------------------------------------------NAME TARGET State SERVER State_details--------------------------------------------

Oracle's self-JOIN operationFor Oracle databases, there are two sets of grammars currently supported, one for Oracle's own SQL syntax and one for the standard SQL99 syntax, and two sets of syntax for Oracle's connection operations can be implemented

If Oracle Provider for OLE DB is not installed when Oracle is installed, it will result in the inability to use the Oracle client drive problem when using the program, and the remedy is to re-download the client program. The following is a

First, the failure to comeA day at noon, the unexpected interruption of power, the computer room ups due to heavy load and did not take over power supply, all servers restarted ...When all servers are restarted, the device and the business operation

Today submitted to the client side a SQL script to go with the new historical data, the result of the client side of the deployment personnel made a mistake, directly take the system account to deploy, the result of the first code did not succeed,

In Oracle development, the client sends SQL statements to the server, the server compiles the SQL statements,The result of the execution is returned to the client. The Oracle SQL statement consists of the following commands:? Data definition

"MSSQL"connectionstring="server=.; database=bjrd;uid=sa;pwd=123456"Providername="System.Data.SqlClient"/> "Oracle"connectionstring="User Id=jijian; Password=jijian;data source= (description= (address_list= (address=) (PROTOCOL=TCP) (host=127.0.0.1))

The functions previously described in Oracle are string processing, date functions, mathematical functions, conversion functions, and so on, and a class of functions are general functions. Mainly: NVL,NVL2,NULLIF,COALESCE, these functions can be

At the same time on their own computer installed Oracle client and server, last time can also use, this time suddenly can't use.[Email protected] oracle]$ Sqlplus Scott/tigerSql*plus:release 9.2.0.4.0-production on Mon Nov 24 11:06:50 2008Copyright (

Often there is a business scenario where we have duplicate records in the same table , and we want to delete the duplicate records, this article is used to solve this problem, the method is the most efficient method I am currently encountering (if

Permissions:Create sessionCREATE tableUnlimited tablespaceConnectResourceDbaCases:#sqlplus/nologSql> Conn/as sysdba;Sql>create user username identified by passwordSql> Grant DBA to username;Sql> Conn Username/passwordSql> select * from