oracle 11g sql certification

can modify the parameters of the main library by using the following commands. After modification, create Pfile.ora = '/backup/pfile.ora from spfile= '/oracle/product/11.2.3/dbs/initjlprojct1.ora '; sql> ALTER SYSTEM SET log_archive_dest_1= ' Location=+arch/jlprojct/archivelog valid_for= (all_logfiles,all_roles) Db_unique_name=jlprojct '; System altered. sql

Some ASP. NET + Oracle 11G systems write and learn essays, including Oracle's "rownum" and "sequence serial number 」. (6) Oracle rownum, equivalent to the select top of other databases Oracle does not support the select top syntax. to retrieve the maximum or minimum records, you must use the rownum keyword and subque

from the master database to the Standby DB:SQL> alter system set log_archive_dest_state_2 = defer;Re-enable log transmission after flashing back:SQL> alter system set log_archive_dest_state_2 = enable; Oracle 11g environment:The steps are simpler. The new features of Snapshot Standby Database are added to the 11g, which is actually a package of the above 10g fun

How to export an empty table in Oracle 11g Because of the new features created by the delay segment of Oracle 11g, Oracle does not allocate data segments when there is no data insertion, leading to exp being unable to export the empty table of the

I recently looked at a blog and found that Oracle 11g provided the new feature of user rename. In a 10g environment, if you want to rename a user, you should first create a new user and authorize it, import all objects under the original user and delete the old user! Next we will introduce this new feature in the 11g rac environment! 1. Create a test user xxx and

used and that the different invocations of the statement use the same execution plan. A bound peek is no longer useful for generating a valid execution plan if different invocations of the statement derive significant benefits from different execution plans. A schedule does not always apply to all bound values, and in order to resolve this problem as much as possible, Oracle Database 11g introduces adapti

---------- ----------------------------------------1 First row of data3 third row of dataNext, perform a recovery operation on the data you just deleted:1. Turn on the mobile function of the tableSql> ALTER TABLE TB_FLASH1 enable row movement2/The table has changed.2. Restore the table to the time when the data was deleted (note that the time is as close as possible to the time you deleted the data or slightly forward)Sql> Flashback table Tb_flash1 to

After migrating the data of a test system from Oracle 10 Gb to 11 GB, I heard the developers say that they failed to execute an SQL statement to create an index, but it can be executed normally in 10 Gb. This index is a function index with duplicate columns. It may be incorrect and this index is not useful. Therefore, you have never paid attention to this index. I felt quite interesting, so I tried it mysel

pfile= ' $ORACLE _home/dbs/initicsdb.ora 'Sql> create SPFile from Pfile;Run the following script:CREATE DATABASE IcsdbUSER SYS identified by Sys_passwordUSER SYSTEM identified by System_passwordLOGFILE GROUP 1 ('/ora_data/icsdb/redo01a.log ', '/ora_data/icsdb/redo01b.log ') SIZE 100M BLOCKSIZE 512,GROUP 2 ('/ora_data/icsdb/redo02a.log ', '/ora_data/icsdb/redo02b.log ') SIZE 100M BLOCKSIZE 512,GROUP 3 ('/or

Solution for Oracle 11g forgetting SYS and SYSTEM passwords Oracle 11g forgets the SYS and SYSTEM passwords. The answer is simple: change the password! 1. First, log on to the SYS account using the operating SYSTEM authentication method and change the SYSTEM account password. $ Sqlplus/as sysdba

With the upgrade of the Oracle version, RMAN is also enhanced. RMAN in Oracle11g supports the use of different operating systems and different databases. For the compatibility of RMAN, refer: Oracle RMAN compatibility and FAQs between different versions and different platforms This article demonstrates an example of restoring 10 Gb to 11 GB in linux. Target end: OS: Ora