Database Administrator

The name looks terrible: Web Scale. It is actually based on the Community version of Oracle MySQL 5.6, and some tools and patches are added. Let's take a look at this

Originally, LAMP programmers had to use the help of the operating system to complete some periodic database operation tasks, such as Windows scheduled tasks or Linux contab. MySQL5.1 has finally added the Event Scheduler function, which allows you

In some cases, you need to associate different databases for Data Query and operations. In Oracle, database links are used to associate tables with different databases ). There are two ways to create a DB link: Creating an SQL statement and creating

MongoDB GridFS best application Overview Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszs GridFS is a simple File System Abstraction on the MongoDB database. If you are familiar with Amazon S3, GridFS is similar to it.

Let's take a big picture first:  SQL statement used: BYS @ ocm1> select dbms_rowid.rowid_relative_fno (rowid) file #, dbms_rowid.rowid_block_number (rowid) block #, deptno from bys. test; FILE # BLOCK # DEPTNO ------------------------------ 4 391 10

EXCEPT/INTERSECT, CASE/ISNULL/COALESCE in SQL SERVEREXCEPT and INTERSECT General explanation: Compare the results of two queries and return non-repeated values. EXCEPTFrom the left query, all non-repeated values not found in the right query are

1. JDBC connection to DB2 Copy codeThe Code is as follows:Class. forName ("Com.ibm.db2.jdbc.net. DB2Driver ");String url = "jdbc: db2: // dburl: port/DBname"Cn = DriverManager. getConnection (url, sUsr, sPwd ); 2. JDBC connection to Microsoft

When a developer modifies a table, the DB2 database reports the SQL0670N error. The details are as follows: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131229/220H9E93-0.jpg "title =" 11111.jpg" alt = "164703641.jpg"/> How is

1. General steps The steps for creating a standby database through RMAN backup are roughly as follows: 1) set the primary database to force loggin Mode 2) set the primary database to archived log mode. 3) configure the parameter files for the master

1. Mysql Installation Method Mysql is a platform-independent open-source relational database. you can install and deploy the Mysql database in rpm mode, which is also the simplest. However, for the rpm version, the functions of the Mysql database

I haven't posted any articles for a long time! Hard Disk Selection 1. Try to select a SAS disk if possible on the hard disk. If there is no bad money, you can choose SSD, funsion-io, and so on. You can also consider SATA Disks Based on the selected

Generally, MySql database backup can be performed in two ways: Exporting SQL statements directly or SQL storage files in other formats that are easy to import, using SQL statements or some visual clients to export data, this method is very simple

Openness SQL ServerIt can only run on Windows without any openness. The stability of the operating system is very important to the database. The Windows9X series products focus on desktop applications, and the NT server is only suitable for small

Shard change tracking: MV logs are not required To understand this enhancement function, you must first understand the partition trimming concept during the materialized view (MV) Refresh process. Assume that the table ACCOUNTS is partitioned Based

Many companies use data warehouses for data analysis. Generally, they extract data from online backup databases (such as mirror, logshipping, and slave) to the ods layer. From the ods layer to dw to dm, especially from the ods layer to dw, data

If TCP/IP is used, Microsoft XML 4.0 must be installed for ADO and XML .). It is divided into two parts: server and client. The server can be connected to multiple users at the same time. There are many ways to remotely connect to the Access

Overview When your SQL Server database system runs slowly, you may know more or less that you can use the SQL Server Profiler (SQL event Profiler) tool for tracking and analysis. Yes, Profiler can be used to capture all statements sent to SQL

Designing an application system does not seem difficult, but it is not easy to optimize the system performance. There are multiple options in terms of development tools, database design, application structure, query design, and interface selection,

As a wholly owned subsidiary of Sybase, Sybase 365 is a world-leading provider of Mobile Information collaboration, mobile content management and sending services in terms of global transmission and settlement of mobile information and data services.

Recently, a large number of new database management software packages have moved into the market. Oracle's just-released Database 11 GB promises to provide DBAs with new features beyond the DBA's understanding scope. Microsoft's SQL Server 2008 will