Database Administrator

System Environment:1. Operating System: Windows 2000 Server, 128 MB of machine memory2. Database: Oracle 8i R2 (8.1.6) for NT Enterprise Edition3. installation path: D: \ ORACLESteps for creating a database:1. manually create related directoriesD: \

MySQL has quietly announced that it will not release the MySQL Enterprise Edition server as a tar package, less than a year after the company announced that it would divide MySQL into the free and paid versions. Although its Enterprise Edition

Since yesterday, I planned to install Linux on a machine in the lab. I was going to install Red Hat9, but I am always a bit old. But who told us to have the RedHat9 book. However, if the disk is put in a boot installationBlablablaKernel panic ..Ft.

I heard someone say they want to buy a genuine Oracle version, saying that it is pirated. oracle will find you legally responsible. In fact, we use genuine oracle products. If you feel that you are very competent, you can solve oracle problems. You

The customer said earlier that it deleted the newly added data file USERS02.DBF and USERS03.DBF in table space USERS by mistake. No valid backup is found for both files during restoration. Ask if the data can be recovered. 1. Simulation

There are many methods to migrate the database, and RMAN is commonly used for migration. Using RMAN to migrate a database belongs to the physical backup and recovery scope of the database. The database information is a complete image throughout the

Block change tracking is a function provided from Oracle 10 Gb. It is disabled by default in the system.When this feature is enabled, the relevant information is recorded in the file whenever the data block changes.In this way, when RMAN performs

This ordinary Thursday, like the past, goes to the company, opens a computer, and receives emails. In a few minutes, I received a text message with a mobile phone alarm. I checked it and put it there. I was able to receive hundreds of alarm messages

I'm afraid InnoDB is the most familiar with the MySQL storage engine. The performance of InnoDB is not bad, especially for Internet applications. However, InnoDB cannot be called Perfect, especially the performance of a single-instance MySQL is not

Data transfer is a common problem in system deployment. How can we achieve efficient transfer and transmission of massive Oracle Data? The following describes how to deploy the postal resource visualization system. I. Use a tablespace for

I learned the update statement today and the $ push modifier. The example in the book makes me puzzled. The first two parameters of update () are query and new documents. The example in the book is as follows. Find the Key in the set as Gende rather

DDL commands require the internal structure of the exclusive lock. If these locks are not available, a "ORA-00054: resource busy" will be returned, which can be particularly frustrating when attempting to modify frequently accessed objects, to solve

The customer database encountered a ORA-600 (504) error where 5th of the error parameters were row cache objects. Previously I encountered a related latch for a shared pool: Error message: Wed Apr 18 06:03:41 2012 Errors in

The binlog function is enabled for mysql in the home decoration. The advantage of enabling this function is that it facilitates data recovery in the future, but the disadvantage is that log files are growing rapidly and will soon occupy the disk

New Features of Oracle flash Query Starting from oracle9i, oracle provides the flashback query feature, allowing data in the rollback segment to be flashed back, the following example shows the new features provided by oracle9i. SQL> update emp set

Two Methods for Oracle rename data files Note: red indicates the original path. Purple indicates the target path. First Alter tablespace users rename datafile '=' '***'; This method requires the database to be in the open state and the tablespace to

After installing MySQL on CentOS, remote access control is disabled by default. You can enable the following settings. Log on to MySQL:Mysql-uroot-p To change the password, the first time:Mysqladmin-u root password NEWPASSWORDAlready

Natural connection Select * From r1 natural [inner] join r2 natural [inner] join r3 Where P;   Select A1, A2 From r1 Natural [inner] joinR2, r3 where r2.A = r3. B; In the natural connection, all columns with the same attribute name in the matching

Create a tablespace in Oracle 1. Create a common tablespaceCreate tablespace oracle_tablespaceDatafile '/home/oracle/oradata/orcl/oracle_tablespace.dbf'Size 100 mAutoextend on next 10 M maxsize 200 MExtent management localUniform size 1 m; 2. Create

The following describes how to query the returned dataset by page in an Oracle stored procedure: Create or replace procedure PROC_GET_DATA_PAGING (P_TABLENAME IN VARCHAR2, -- table (View) NameP_STRWHERE IN VARCHAR2, -- Query ConditionP_ORDERCOLUMN