fundamentals of database systems

Requirements for Oracle 11.31 database installation on HP-UX IA64 11.2 systems: I. Swap memory requirementsBetween 4 GB and 8 GB then 2 times RAM.Between 8 GB and 32 Gbit/s then 1.5 times RAM.More than 32 GB then 32 gb ram.Ii. JDK requirementsHPUX JDK6.0.05, hpux jdk 5.0.15 Iii. Minimum Kernel Parameter requirementsDuring installation, you can generate and run the Fixup script. to check and set the kernel p

is limited to 127.0.0.1 that is the local connection, check the data found that the monitoring error, when the listener is set to localhost, this situation will occur WORKAROUND: Simply change the listener to the name of the host Locate the Listener.ora file for H:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN under the Oracle installation directory Will LISTENER =(Description_list =(DESCRIPTION =(ADDRESS = (PROTOCOL = IPC) (KEY = EXTPROC1521)))(DESCRIPTION =(ADDRESS = (PROTOCOL = TC

this kind of problem, think not its solution, can only resort to Baidu. After another round of Baidu, found that the project compiled target to x86 after the recompile is not enough, but also needConfigure the application pool for IIS to configure the application pool to "enable 32-bit applications" as shown in the configuration:After changing the IIS application pool configuration, run the client program again, OK everything is fine.Note: Because the client program is written in C #, there are

student values (3, ' Rose ', ' female '); courseInsert data: Insert into course values (1, ' math '); Insert into course values (2, ' physics '); Insert into course values (3, ' chemistry '); 　　 markInsert data: INSERT into Mark values (7,1,3,95); INSERT into Mark values (8,2,3,75); INSERT into Mark values (9,3,3,85); 　　 Finally, you can view these three tables: SELECT * from student; /* +-----+-------+--------+ | sid | sname | gender | +-----+-------+--------+ | 1 | Tom | male | | 2

[INS-35172] Target database memory (XXMB) exceeds the systems available shared memory ({0} MB) Solution When installing the Oracle 11gR2 database, an error is reported during installation: [INS-35172] Target database memory (778 MB) exceeds the systems available shared mem

This book details multiple common Delphi modules and typical systems, the specific implementation of common modules such as system logon, user and permission management, database connection, data access, data display, and printing is described in the example, personnel Management and Attendance Management, the whole process of system analysis, database design and

Tags: style blog http io ar color OS sp strongThis artical also published in english:http://www.cnblogs.com/larryatcnblog/p/4153295.htmlWhat is HP SIM? The article said that the SIM refers to the Systems Insight MAnager, is the HP company to its own server production of a central management web, the interface is as follows.The basic function is to detect the HP server in the network, when the server down or have hardware problems can give alarm.This i

tasks2. Add a scheduled task.3, the last step is to specify the backup time.It is easy to complete the automatic scheduled backup here.Finally, let's say one more word about this batch command \%date:~0,3% the meaning of extracting the day of the week informationOf course, if you want to create years and days of the words with%date:~0,10%, the system will give you a daily directory of the date. It's very convenient.%date:~0,10%//Extract date information%date:~-3%//Extract Day of the week inform

Introduction: This is a detailed page for PHP database operations in different systems. It introduces PHP, related knowledge, skills, experience, and some PHP source code. Class = 'pingjiaf' frameborder = '0' src = 'HTTP: // biancheng.dnbc?info/pingjia.php? Id = 325721 'rolling = 'no'> Recently I wrote a PHP project, which has been developed in the Win XP environment. Deploy it to a remote space (UNIX

, there is a system to use and maintain it, without the user's intervention, indexing is to reduce the time of the query operation, but assume that the data additions and deletions frequently, the system will spend a lot of time to maintain the index, thus reducing the query efficiency. You can delete some unnecessary indexes at this time.In SQL. Dropping an index uses the DROP INDEX statement, which is generally formatted as:DROP Index Eg: delete the stusname index of the student tableDROP INDE

The mysql database design of the bus system, online and other existing bus lines in a certain area and their corresponding bus lines each station name, for example, 2 Che Qingshan Road -- Bayi Road -- Shanghai Road 3 Che ningnote Road -- Bayi Road -- Shanghai Road... from station name 1 to station name 2, some of them are directly connected by a shuttle bus, and some of them need to be transferred. now I ask: in MYSQL, how should we design the

The Oracle tutorial you are looking at is: six experiences with Oracle database systems. Use of the 1.having clauseThe HAVING clause controls the row groups determined by the GROUP BY clause, which only allow constants, clustered functions, or columns in the GROUP BY clause to be involved in the condition of the HAVING clause.2. Use of outer join "+"The outer join "+" is divided by its left and right joins

Design and Implementation of multi-user permission Control for Web application systems-database design [2]: multi-user permission Control To build a Web permission Configuration System, you need the following five data tables: Personnel table, group table, page table, directory table, and Operation permission table. The IDS used in each data table are the IDs of auto-increment 1. The definitions of each da

(0 or 1) to meet the necessary parity conditions.(3) Make the required k parity check for the information received.(4) If all the parity check results are correct, the information is considered to be error-free. If one or more errors are found, the wrong bits are determined uniquely by the results of these checks.One of the basic considerations when seeking a sea-key is to determine the minimum number of check digits required K. Consider the information with a length of n bits, and if the K che

the current page of a frame has been requested but not yet released, that is, the current number of users of the page, recorded in the Pin-count variable of that frame, The Boolean variable dirty indicates whether the page has been modified since it was read into the buffer pool from disk.At the beginning, the pin-count of each frame is set to 0,dirty set to false. When the page is requested, the buffer does the following:1. Check that the buffer pool contains the requested page, and if there i

Tags: size recording stage can optimize operation database access Basic one database SMSMycat is a database sub-Library sub-table middleware, the use of Mycat can be very convenient to implement database sub-table query, and reduce the business code in the project. Today, we will introduce the background of the birth o

The goal of the database management system (DB Management systems) is to create, process, and manage databases. DB2 As a pioneer and navigator in the relational database field, IBM completed the System R prototype in 1977 and began providing integrated database server--SYSTEM/38 in 1980, followed by Sql/dsforvse and

Tags: Database systems engineering Division Nine Yin Canon School of Information"Five years college entrance examination three years of simulation" equivalent to the entrance examination "Martial arts Cheats" in the "Nine Yin Canon." A large amount of the question bank, the real problem of detailed analysis, the teachers and students sought after. Can be seen, the real problem is to deal with the examinatio

recommended to turn on the log function (parameter –journal) On 32-bit operating systems, the database size is limited to about 2.5GB The empty database accounts for approximately 192Mb Use GRIDFS to store big data or metadata (not a real file system) best-case scenario: applications that require dynamic query support, need to use indexes inst

outweigh the requirements for functionality It is recommended to turn on the log function (parameter –journal) On 32-bit operating systems, the database size is limited to about 2.5GB The empty database accounts for approximately 192Mb Use GRIDFS to store big data or metadata (not a real file system) best-case scenario: applications that r