oracle master data management ppt

):Oracle use Thedata dictionary (tables in the SYS schema) to track allocated and free extentsfor tablespaces "Dictionary managed" mode. Free space isrecorded in the SYS. fet$ table, and used space in the SYS. uet$ table. Wheneverspace is required in one of these tablespaces, the ST (space transaction) Enqueue latch must are obtained to do Inse RTS and deletes agianst these tables. As only one process can acquire the ST Enque at a given time, this oft

Management of 1.Oracle Tables Naming conventions for table and column names: Must start with a letter; Length cannot exceed 30 characters; Cannot use Oracle's reserved words; Use only the following characters: A-Z, A-Z, 0-9, $, # etc. Data types supported by Oracle: Character type

1. Object definition When the Create command is executed to create an object, Oracle stores the object definition in the data dictionary. 03:31:40 sql> Select Dbms_metadata.get_ddl (' TABLE ', ' DEPT ') DDL from DUAL; Ddl -------------------------------------------------------------------------------- CREATE TABLE "SCOTT". " DEPT " ("DEPTNO" number (2,0), "Dname" VARCHAR2 (14 2, viewing the space oc

The experiment is divided into two steps:1. Local tablespace managed by LMT. Structure Analysis of data files during Automatic ASSM segment ManagementORACLE 11G: 0 operating system block, 1-2 is the file header, 3-is the bitmap information. Data is stored at the beginning and end of 128-it may be the data of the segment header or segment.When

　　To delete an archive file of the master database in the Maximum Availability and Maximum Performance modes of Oracle Data Guard, the archive file must be deleted after the backup database is applied. 　　For Maximum Protection mode, logs in this mode are written to the master database and the slave database at the same

set to MANUAL or AUTO: Drop the tablespace from the primary database:1. delete a tablespace from the master databaseSQL> drop tablespace tbs_4; SQL> ALTER SYSTEM SWITCH LOGFILE; Make sure that Redo Apply is running (so that the change is applied to the standby database). If the following query returns the MRP or MRP0 process, Redo Apply is running.Make sure that the redo application is running, so that the slave database will apply these changes.

):Oracle use Thedata dictionary (tables in the SYS schema) to track allocated and free extentsfor tablespaces "Dictionary managed" mode. Free space isrecorded in the SYS. fet$ table, and used space in the SYS. uet$ table. Wheneverspace is required in one of these tablespaces, the ST (space transaction) Enqueue latch must are obtained to do Inse RTS and deletes agianst these tables. As only one process can acquire the ST Enque at a given time, this oft

Currently, Oracle is the largest database, and its management system is also the fastest growing. How can we better utilize the powerful data management functions of Oracle databases in practical applications? This has become an important issue in

Today, a database synchronization problem is encountered, the main library is closed, after restarting the main library, the repository does not synchronize the main library data properly. The repository can be consistent with the main library only when the archive log is manually switched.The solution to this problem:Restart the repository and reapply the archive log.The procedure is as follows:Turn off the standby listenerLsnrctl stopClose the Stand

The oracle dg slave database does not synchronize the data of the master database. Today, a database synchronization problem occurs. The master database is shut down. After the master database is restarted, the slave database cannot synchronize the

Welcome to the Oracle community forum and interact with 2 million technicians before the 9i version. Oracle has no built-in method to record the passage of time. Data of the DATE type is used to record individual time points. To express a time amount (that is, an interval), the Database Designer must convert the time interval to the original unit of seconds, and

1, the function of the data dictionary The data dictionary records the system Information of the data, which is a collection of read-only tables and views. The owner of the data dictionary is the SYS user, and it is saved in the system table space. 2, the concept of data

Oracle, as the largest Oracle database management system, is developing rapidly. If you want to better utilize the powerful data management functions of Oracle databases, this has become an important issue in

Prior to the 9i version, Oracle had no built-in way to record the passage of time. Date data is used to record individual points of time, but to express a time amount (that is, an interval), the designer of the database must convert the time interval to the original unit seconds and then save it with a number column.Although number is a data type that can accurat

In Oracle 9i, data can be easily exported to a file or imported from a file. With Oracle's Management Server (Oracle Management server,oms) can be easily implemented, there are many places to explain the entire operation, but the complete guidance is not much. Many of the ma

Label:First, the conceptA tablespace is a logical part of a database.Physically, the database data is stored in the data file;Logically, the database data is stored in a table space, and the tablespace consists of one or more data files. Second, the logical structure of the databaseThe logical structure in

When you activate a constraint using the Enable VALIDATE option, the error message is prompted if the data already exists that does not meet the constraint rule, and the activation constraint fails. The existing data must be corrected at this time, ensuring that the data is fully mouthed with the constraint rules. The specific methods are as follows: (1) Establi

Tags: varchar2 problem content har backup sys TAF ALTER RESFirst, the conceptA tablespace is a logical part of a database.Physically, the database data is stored in the data file;Logically, the database data is stored in a table space, and the tablespace consists of one or more data files. Second, the logical structur

',3 '/u01/app/oracle/oradata/stdb/test02.dbf ',4 '/u01/app/oracle/oradata/stdb/test04.dbf '5 to6 '/u01/app/oracle/oradata/stdb/test1.dbf ',7 '/u01/app/oracle/oradata/stdb/test2.dbf ',8 '/u01/app/oracle/oradata/stdb/test3.dbf ';Database altered.sql> ALTER DATABASE open;Datab

Oracle database-Management section for data processing and tablesTypes of *sql DML(Data manipulation Language-action language): Select/insert/update/delete DDL(data definition Language): Create Table/alter table/truncate table/drop table Create/drop vi