what is oracle exadata

What are the differences between SQL Server and Oracle and MySQL ?, Oraclemysql SQL, here I understand it as SQL Server. These three relational databases have the highest market share (based on the Installation volume rather than the income) and are representative. DB2 (IBM), which ranks fourth, is similar to Oracle's positioning and architecture. If you want t

determine its use of GBK encoded values. Let's check it out:Conclusion:1. The command that performs character set conversion modifies the data dictionary2. The command to perform character set conversion is not re-encoded with the new character set for previously stored characters. Because if the target character set is not a superset of the original character set, there may be garbled characters (especial

What should I do if oracle forgets the password of sys/system/scott? I. Forget the login password of a user other than SYS and SYSTEM. Log On with SYS (or SYSTEM) USER: conn sys/PASS_WORD as sysdba; use the following statement to modify the USER's password: alter user user_name identified by newpass; Note: The password cannot be full of numbers. It cannot start with a number. Otherwise: ORA-00988: Password

After reading the second chapter, I have a general understanding of Oracle's architecture principles. What I like most is to compare other things in my life. It is easier to understand why Oracle works and why I did it. Select a role or position to learn relevant knowledge or chapters. The

What the hell is WebService?Word:WebService is a remote invocation technique across programming languages and cross-operating system platforms. WebService platform TechnologyXml+xsd,soap and WSDL are the three major technologies that make up the WebService platform.Xml+xsd:WebService transmits data using the HTTP protocol, encapsulating the data in XML format (th

I recently read a book called design patterns. I have been looking for a good example to illustrate what a design pattern is? There was such a good example: First, someone came up with an organizational method: I opened a source file with a length of 0.13 million lines, which basically contains the C ++ source code. After careful observation, the original windowxp core code turned out to be written by Objec

of an object in the database is Schema.object, not user.object. The similarity assumes that we do not specify the schema of the object when creating the object. The schema for the object is the default schema for the user. This is like a user has a default tablespace, but the user is also able to use other table space

----------Systemsql> ALTER SESSION SET current_schema = Scott; --Change user Default schema nameSession altered.Sql> select * from test;NAME----------ScottSql> Select owner, table_name from Dba_tables where Table_name=upper (' test ');OWNER table_name------------------------------ ------------------------------SCOTT TESTSYSTEM TESTThe above query is the basis for me to say that the schema is the alias of th

What is a tablespace? 1. view the tablespace and datafile corresponding to a userSelect t1.username, t2.tablespace _ name, t2.file _ name, t1.temporary _ tablespace, t3.file _ nameFrom dba_users t1Left joinDba_data_files t2On t1.default _ tablespace = t2.tablespace _ nameLeft joinDba_temp_files t3On t1.temporary _ tablespace = t3.tablespace _ nameWhereLower (t1.username) in('Lbi _ sys_ptcl ', 'lbi _ ods_ptc

Label:Oracle 11g When the SQL statement does not add an order by, it appears that the result is returned in the order of ROWID.I've also seen some of the relevant documentation, and the official meaning of Oracle is that without order by, the order of output is not guaranteed . So, here's the question:If now I select X

(+), tel VARCHAR2 (32) , fax VARCHAR2 (+), address VARCHAR2 (+), Org_code VARCHAR2 (+), sort_num number, I S_system VARCHAR2 (1), Full_id_path VARCHAR2 (.), Full_name_path VARCHAR2 (2048), Is_leaf VARCHAR2 (1) de Fault ' y ', org_level number, gmt_deleted DATE) tablespace smb_data pctfree Initrans 1 Maxtrans 255; Comment on table sys_department is ' departmental table '; Comment on column sys_department.is_deleted

released for "Linu X Itanium ".IBM Power Based Linux: (64-bit OS) $ uname-a linux stuze22 2.6.9-34.0.1.0.11.el #1 SMP Mon Dec 4 16:10:42 PST 2006 pp C64 PPC64 PPC64 Gnu/linuxIF Linux kernel architecture is "PPC64" and then your platform would be referred as "' IBM Power Based linux ' or ' Linux on Pow Er ' ". Please ensure so downloading/installing the Oracle Database Software Installation Kit that

What is OracleAOL and WhatisAOL? OracleApplicationsareconstructedandmaintainedusingtheApplicationObjectLibrary ( What is Oracle AOL and What is AOL?

Tags: Knowledge employee DDR NET Instance hash index this related checkTurn from: 51333169 Let's start the tutorial with a simple example that explains why we need a database index. Let's say we have a database table Employee, and this table has three fields (columns), Employee_Name, Employee_age, and employee_address, respectively. Suppose the table employee has thousands of rows of data. Now suppose we want to find out from this table all employee information whose names are ' Jesus '. We deci

be running normally, the second is abnormal; if ACCESS is, both are abnormal.3. MSSQL three key system tablesSysdatabases system table: each database on Microsoft SQL Server occupies one row in the table. When you first Install SQL Server, sysdatabases contains the master, model, msdb, mssqlweb, and tempdb database items. The table is only stored in the master d

SQLTuingAdvisor (STA) is part of AutomaticTuningOptimizer. In the previous article, use SQLtuningadvisor (STA) to automatically SQL Tuing Advisor (STA) is part of the automation Tuning Optimizer. In the previous article, use SQL tuning advisor (STA) to automatically SQL Tuing Advisor (STA) is part of the automation Tuning Optimizer. In the previous article,

cottage phone, etc.) By the year 2002, Sun has released the most mature version of the JDK's history: JDK 1.4, which has a lot of awesome companies involved, such as IBM, Symbian, etc. The author (translated to pack B's People) Initially contacted Java is also 1.4 version, to this version of a special, according to the author's own experience, 1.4 version at least in the domestic software company, is