Database Administrator

Oracle elastic cloud and data warehouse provide obvious advantages. First, a single vendor provides all the basic components: Oracle's one-stop approach helps simplify licensing, support, upgrade, and integration, all these transactions are handled

Recently I wrote a database collection program. The process is to periodically collect data from the SQLSERVER database to the Oracle database. Data is generated once an hour, and each time the data volume is about 2 W. Sping3 + hibernate4 is used

The clob field stores text. If less than 4000 bytes are stored, the clob field is stored together with the recording. If more than 4000 bytes are stored, it is not stored together with the record. It is worth noting that the 4000 bytes here are not

We have introduced three applications of Linq: Linq to SQL, Linq to XML, and Linq to Object. This article introduces the implementation methods and application scenarios of dynamic Linq. Namespace: System. Linq; System. Linq. Expressions; We all

1. to get a new bug, we must first reproduce the problem. this is necessary for the code issue, and it is almost necessary for the customer's data issue. if it is a code problem, you cannot modify the code without recreating it. If it is changed,

When using srvctl to create a service, note that the TAF policy option must be configured through the dbms_service package. The following example demonstrates how to create a service felix_ora:1. view the existing service of the system before the

I. First of all, I am talking about the conversion between ACCESS2000 and SQL2000. I have not tried any other products yet. I hope you can experiment more and find a solution;Ii. Conversion Method1. Open "database source" in "Management Tools" under

Source: http://blog.csdn.net/dba_huangzj/article/details/28904503 This article will demonstrate how to deploy images in a domain environment. It is much easier to deploy images in a domain, but many enterprises do not actually use the domain to

If you cannot see the image, you can access this page. Http://note.youdao.com/share? Id = 82c1b692131ecc15eee9348e767756c7 & type = note TOMCAT page appears when you occasionally access the oracle ebs system. Oracle technical support suspect that

1. Create a directory SQL> create directory dump_file as '/db/backup '; 2. Grant Directory Permissions SQL> grant read, write on directorydump_file to bam; View directory SQL> select * from dba_directories; 3. Backup SQL> expdp user/pwd directory =

The SH. COUNTRIES table is required for the 4 sub-questions in session4. When a user creates a database manually, the sh user wants to copy the table from another place without this table.Database Oracle_SID = TEST0221: 11.2.0.4: database ORACLE_SID

Today is very strange, import a single table to report the error of ORA-01401, also searched a circle online, and my situation is different. This error occurs because the characters stored in the exported dmp file are different in bytes. My database

Add Oracle hints to your favorites. Haha We often use hint in the SQL statement optimization process. Here we summarize the common Oracle HINT usage in the SQL optimization process:1./* + ALL_ROWS */It indicates that the overhead-based optimization

Renamedg, a tool used to rename an Oracle asm disk group TherenamedgTool enables you to change the name of a cloned disk group. The disk group must be dismounted on all nodes in the cluster before runningrenamedgOn the disk group. renamedgRenames a

Main features of MeayunDB Cloud Platform Architecture The cloud platform consists of N> = 1 MeayunDB sub-cluster. The applications on each sub-cluster are identical. The only difference is that the data stored in each MeayunDB sub-cluster is

Oracle SQL statement for viewing database tablespace usage Select upper (F. TABLESPACE_NAME) "tablespace name ",D. TOT_GROOTTE_MB "tablespace size (M )",D. TOT_GROOTTE_MB-F. TOTAL_BYTES "used space (M )",TO_CHAR (ROUND (D. TOT_GROOTTE_MB-F.

The Application System life cycle is a whole. In addition to the initial demand research, development, testing, and launch, the longer period is in the O & M aspect. The value of an application system is embodied in the O & M stage. A system O & M

This must be after the id Definition This uses the Time of the AP server instead of the time of the DB server to update the database. That is, when updating the database, new Date () is used instead of sysdate. If you want to use the DB server

After the introduction of asmm from 10 Gb, compared with the previous manual adjustment of various memory components, this makes a huge step forward in automatic management. DBA only needs to define sga_target and sga_max_target. Other things are

Linux: CentOS 1. log on to the system as the root user, download postgresql9.3, decompress the package, and enter the decompressed postgresql directory. 2. Compile and install# Pwd#./Configure -- profix =/usr/local/pgsql(An error may occur. Install