Oracle

A bare device, also called a bare partition (raw partition), is a special character device that is not formatted and is not read by UNIX through a file system. This article collects the bare devices and Oracle Quiz 20 cases. 1. What is called the

Tom has a very good script show_space.sql for viewing object space usage, as described below. The introduction here is relatively simple, the following demo is actually for the table space information, as for the object, I will rewrite below. The

In Oracle, there are many parameters that Oracle does not want us to participate in the modification, and for these parameters we can query through the following statements: Select x.ksppinm name, y.ksppstvl value, y.ksppstdf

1, Startup Nomount Non-installation startup, this way to launch executable: Rebuild control file, rebuild database Read the Init.ora file, start the instance, that is, start the SGA and background processes, this startup requires only Init.ora

The database was found to be slow today, and a large number of processes are waiting for log file switch (checkpoint incomplete), and log files are used as follows: sys@test15>select group#,sequence#,bytes/1024/1024 "bytes (M)", Members,archived,

I. Memory dumps 1). Global Area ALTER session SET EVENTS ' immediate trace name Global_area level n '; 1 contains PGA 2 contains SGA 4 contains UGA 8 contains indrect memory 2). Library Cache ALTER session SET EVENTS ' immediate trace name

Oracle configuration is providername to System.Data.OracleClient or Hxj.Data.Oracle in the connectionstrings node, and there is no difference in the use of other operations. However, as opposed to Oracle's self-growth column, do the appropriate

Some of the performance of the alarm information through the Dba_outstanding_alerts table can be found, the locked table if the long-term release, here can also find the relevant session of the SID and Serial#. Some of the performance of the alarm

Ultra-Large system features: 1, the number of users are generally more than million, and some more than tens of millions of data, the database generally more than 1TB; First, IntroductionUltra-large systems are characterized by:1, the number of

5.2.1 Default-Established administrator After the Management Server was established, two administrator accounts were created by default, as shown in Table 5.1. Table 5.1 The default administrator Account Default password

6.6.1 Create a database with the database configuration Assistant (1) The "Welcome" interface appears as shown in Figure 6.18. (2) The "Operations" interface appears as shown in Figure 6.19. (3) The database template interface appears as shown in

oracle| Data | database ANT Manipulation Oracle Database Practice by Guipei 2005-3-21 Recently, the development work is busy, often take the project home overtime work, the project uses the Oracle database, because the home machine can not

The SQL syntax for the truncation operation is as follows. ――――――――――――――――――――――――――――――――――――― TRUNCATE the user name of the table. List name [drop| Reuse STORAGE] ――――――――――――――――――――――――――――――――――――― In which, if you use the "DROP STORAGE"

1, on the installation of Oracle9i Standard Edition or oracle9i Enterprise Edition Windows machine (ip:192.168.0.2), the product to select a transparent gateway (Oracle Access to Microsoft SQL Server database in transparent Gateway $ORACLE

1. Set the SQL statement for the five rollback segments as follows: 　　 SELECT segment_name from Dba_rollback_segs WHERE initial_extent Uppper (OWNER) = ' public ';SELECT UPPER (STATUS) from Dba_rollback_segs WHERE UPPER (segment_name) = ' 　　 ALTER

ORACLE Company since 86 launched version 5, the system has distributed database processing capabilities. 88 Release version 6,oracle RDBMS (V6.0) can be brought with transaction options (TPO), which improves transaction processing speed. 1992

RAID, a redundant array of inexpensive disks, is a way to put the same data in different places on multiple hard disks. There are many different types of RAID (called Raid "level"), each of which has its relative advantages and disadvantages. For

Prior to the Oracle 8i release, the internal user was used to perform the database startup and shutdown, as well as create database operations; Oracle has been phasing out internal users since the 8i version, Users who are granted the SYSDBA or

oracle| problem 41. How do I annotate tables and columns?　　Sql>comment on table is ' table comment '; note created.　　Sql>comment on column table. Column is ' column comment '; note created. Sql> SELECT * from user_tab_comments where comments isn't

Oracle,sql Server,mysql's self-variable setting: 1, MySQL's own variable is relatively good to remember, using the Auto_increment keyword, if you know English is easy to remember, the following to create a table with self-change. create table test(