Database Administrator

1. Find SQL Server Profiler and log on Location: Click start -- program -- Microsoft SQL Server -- performance tool -- SQL Server Profiler Or find the location after Logon: 2. Then, enter the following interface: Enter relevant information and

I. Preparation knowledgeConstraints are placed in tables. There are five constraints:Not null the column specified by the non-NULL constraint C cannot be NULL.UNIQUE has no duplicate values in the column specified by the UNIQUE constraint U, or each

  Principle: (1) Use database link to establish a connection between the two databases. (2) create a stored procedure: delete all data tables, and insert the data table content of the production database to the test database. (Commit) (3) Use Jobs

Temporary table concept A temporary table is a database object used to temporarily save temporary data (or intermediate data). It is similar to a common table, but it is quite different. It can only be stored in temporary tablespaces, not user

There are still many steps to generate a shared disk and mount it to asm when Oracle VM builds Oracle RAC. Record it. The premise is that a linux has been installed in the VM.1. here I create five disks, cd C: \ Program Files \ Oracle \

SQLite has no restrictions on the Authorization protocol and supports most of the standard SQL 92 statements. We believe more and more people will use this database.The combination of PHP and SQLite is just like the combination of ASP and ACCESS in

Oracle Database 10g audit captures user behavior at a very detailed level, which can eliminate manual, trigger-based audit. Assume that user Joe has the permission to update the table and updates a row of data in the table as follows.

Sybase SQL Server is a multi-database RDBMS with the following Architecture: 1. Database The database used by the server itself can also be said to be the database used to manage the server and user database. Sybase automatically creates four system

Data Files in Oracle databases have a feature that allows you to set whether to go offline. If you set the data file to offline, the database cannot read the data file. The database can read contents only when files are online. Therefore, changing

The Microsoft SQL Server 2005 installer checks whether COM + is correctly configured. If a configuration error is found, the installer continues, but the following warning is displayed in the System Configuration check (SCC) report: "If the SQL

When querying data, we usually need to specify the rows of data to be returned. For example, if there is a B/S architecture application, each page may display only 30 records. To improve the display efficiency, the database is generally required to

DatabaseOfNameYou can change the database name according to your habits. The following describes how to change the database name. Step 2 Click Start in Windows and select programs. Select Microsoft SQL Server console from the list. Step 2

1. In the mysql compression directory, there is a bunch of parameter configuration files, such as: my-innodb-heavy-4G.ini, copy this file, change the name, such as: my. ini 2. Open the my. ini file and add the following parameter: [client]: add the

Setting Informix Environment Variables I. Environment exampleVariable Name DescriptionDBDELIMITER specifies the field delimiters used by dbload in the extract data file.DBDATE specifies the date format (Y4MD/, MDY4-) to be used in the database

The more memory available for SQLSERVER, the more resources SQLSERVER has to use in the buffer zone, which can reduce the number of times the server reads data from the disk to obtain static information or compile the process plan. To adjust the

Due to historical reasons, many enterprises have multiple database platforms at the same time, and each database platform runs one or more related applications. As the business of an organization continues to expand, how can we quickly and

The time spent preparing new SQL statements is the most important part of the execution time of Oracle SQL statements. However, by understanding the internal execution plan generation mechanism of Oracle, you can control the number of times that

The distributed database system is developed on the basis of the centralized database system. Compared with the distributed database system and the centralized database system, it can be found that the distributed database system has the following

Bkjia.com comprehensive report tips and tips: how to deploy operational business intelligence solutions for your Enterprise PrefaceChapter 2: transforming data explosion into business intelligenceChapter 2: Operational BI-opportunities for

1. Start and close the Informix Database 1. Automatic Start of Informix Start the Online command:Oninit However, in general, the startup command is created in the/etc/rc2.d directory and named S96informix, so that Online starts when the operating