Oracle

Two days ago in the pub to see someone met this problem, today's lectures met, but the night to simulate the dead and alive are not reproduced. The problem is to first block the Flash recovery area function, and then restore the function, the

It's not good to look at Doc. sql> shutdown Immediate The database has been closed. The database has been unloaded. The ORACLE routine has been closed. Sql> Startup Mount The ORACLE routine has started. Total System Global area 104857600

ORACLE10GR2 new features: Asynchronous COMMIT For Oracle's commit mechanism, I believe that we are already very familiar with. Oracle takes a synchronous write transaction log for a commit, that is, once a commit is issued, all redo that must wait

Conn System/manager ----------------------------Create a user, assign quotas, and create a table--------------------- DROP USER test2 CASCADE; Create user test2 identified by Test2; Select Username,password,profile,default_tablespace from

There is a problem that has been puzzling for a long time, in case of a failure when upgrading CRS. The RAC is a joke that can't be easily opened. This test is done on the Linux platform, and the production library operations need to be cautious. 1

--The syntax is as followsMerge into QCFANG.BBB b using (SELECT * from QCFANG.AAA) aOn (b.a_id=a.a_id)When matched thenUpdate setB.a_name=a.a_name, B.a_sex = a.a_sex, B.a_type = A.a_type,b.a_salary = A.a_salaryWhen not matched

Scenario: Temporary table space Full, unable to release The solution is summarized as follows: --1 Create transit temporary table space Create temporary tablespace temp02 Tempfile '/oradata/crpt_temp_tra.dbf ' Size 20G reuse autoextend on next 1

Starting with Oracle 9i, Oracle allows you to make a reputation for primary keys, unique keys, and foreign KEY constraints for view. The NOT NULL constraint can inherit from the base table, so it is not allowed to display the declaration. Because

1. RAID definition RAID, full name Redundant array of inexpensive disks, Chinese name is redundant array of inexpensive disks. RAID can be divided into soft raid and hard raid, soft raid is the software to achieve multiple hard disk redundancy.

One, the source side Add extract Extl,tranlog,begin Now ADD EXTTRAIL/U01/OGG/DIRDAT/LR, EXTRACT EXTL ADD Trandata chf.objce_t Edit params EXTL Extract EXTL UserID Ogg,password Xifenfei Exttrail/u01/ogg/dirdat/lr Dynamicresolution

Software Environment: 1. Windows 2000+oracle 8.1.7 2, the ORACLE installation path is: C:\ORACLE Implementation method: 1, Start-> Settings-> Control Panel-> Management Tools-> Services Stop all Oracle Services. 2, Start->

1. Compare Sql*loader performance differences that are loaded using conventional traditional and direct methods. First, the concept 1. Direct Load Advantage (1) Direct loading is higher than traditional loading efficiency (2) Do not scan the

"Data compression" used to be a new word for me, not have not heard, but did not actually use, has been doing project manager work is also designed to the database operations, but because the storage design is more abundant, in addition to the

The Pl/sql code in Oracle involves two execution engines, one that specializes in standard SQL statements, and another process code that handles Pl/sql, which typically leads to extra CPU overhead on engine switching. For example, the difference

The way in which roles (database permission sets) interact with stored procedures, functions, and packets is one of the most difficult parts of the Oracle security model to handle. Object permissions in Oracle can be indirectly granted to users,

Codesmith is a code generation tool for. NET, and many of its own templates are almost all systems for SQL Server architecture, and when Oracle is used, many templates need to be customized because of the differences between Pl-sql and T-SQL. There

The following function is the function I write when I write the Oracle database stored procedure, I feel that this function is more versatile, so it is published for the reference of the people who need it. This function is primarily used to remove

In Sql_plus, spool ExecCompProc.sqlselect 'alter procedure '||object_name||' compile;' From all_objects where status = 'INVALID' and object_type = 'PROCEDURE';spool off@ExecCompProc.Sql; Organize into a stored procedure Create Or Replace

Oracle provides a variety of diagnostic tools for the RDBMS, and diagnostic events (event) is one of the common, easy-to-use methods that enable DBAs to easily dump database structures and track specific occurrences. The usual format and

Oracle has launched a new execution plan with two tips native_full_outer_join and no_native_full_outer_join to control this execution plan. The use of these two hint is simple and requires no additional parameters. The following example continues