Database Design

a type of data that does not use numbers but uses nouns.

an entity set may not have sufficient attribute 2 form a primary key is called weak entity set.ex entity set payment has 3 attribute pay-no,pay-date, pay-amount.pay-no is a sequential no generated 4 each loan.each payment entity is distinct,payments 4 different loans may share the same payment no.thus entity set doent have a primary key,so it is a weak entity set.

Placid04

bakhra,muzaffarpur,bihar.

With a simplified rep, less of the model data is loaded into memory. Computer performance is improved.

Hi, Iam Mousumi, Iam a Bsc(Csc honours) Student.I want to do a dbms project encorporating the ideas of data mining within three months could you help me in choosing the project

Centralized design is one of the two major methods of designing a networked database, the other being distributed design. In a centralized design, all the database table schema and the data reside in one place where all of the users access it (i.e., central to the users.) Conversely, a distributed design replicates the schema in multiple places and segments the data amongst the multiple sets of tables. Each group of users accesses a particular distributed set of tables with the data relevant to their group. This improves data security and retrieval time for the users at the cost of increased complexity of database maintenance and backup.

The two major commercial classes of database are; relational and non-relational.

Example of non-relational databases include Informix c-isam and dbisam.

The main relational databases are; MS SQL Server, Sybase, Oracle, Progress, mySQL.

Database management system is full form of DBMS . Characteristics of a DBMS are following :

1) It maintains data integrity.

2) It reduces redundancy.

3) make access to data easy.

Oracle and Access are both RDBMS's (Relational Database Management Systems). Consequently they both use tables which have 'keys' to retrieve rows, and use 'foreign keys' to other tables to 'relate' those rows together. Oracle and Access also both use SQL (Structured Query Language) to allow you to use the database (for example: "select * from customer_table where customer_number = '12345'"), although you can use tools which provide a more graphical environment to produce the underlying SQL. The real difference between the two is that Oracle is an industrial strength RDBMS.

The logic structure is independent of any kind of data model,in the practical application, the general database used by theenvironment has given (such as SQL Server or Oracel or MySQL. Due to the current use of the database basically is relational database, so the first thing to the E-R diagram into relation model, and then according to the characteristics andlimitations of specific DBMS conversion for the specificsupport of DBMS data model, the final optimization

A special case of multiprogramming in which users access the computer through terminals, typically the devices with keyboards and screens. Dozens of users share the computer at once. The computer actually does not run them all simultaneously but it runs a small portion of ones user's job then moves the service to the next user providing service to each user several times and then it appears that is is actually doing all its actions at one time but it's not. After all the requests are done they all get responses about the same time.

Each simple attribute of an entity type is associated with a value set (or domain of values), which specifies the set of values that may be assigned to that attribute for each individual entity. If the range of ages allowed for employees is between 16 and 70, we can specify the value set of the Age attribute of EMPLOYEE to be the set of integer numbers between 16 and 70. Similarly, we can specify the value set for the Name attribute to be the set of strings of alphabetic characters separated by blank characters, and so on. Value sets are not displayed in ER diagrams, and are typically specified using the basic data types available in most programming languages, such as integer, string, Boolean, float, enumerated type, sub-range, and so on.

Fundamentally, to provide availability, you need to have (a) replicated components in the architecture so that in the event of one component failing, you can switch immediately to a backup component.

You also need to have several copies of the data that is being processed. Security requires minimizing the number of copies of the data and, wherever possible, adopting an architecture where each component only knows as much as it needs to, to do its job. This reduces the chance of intruders accessing the data.

Therefore, there is a fundamental architectural conflict between availability (replication, several copies) and security (specialization, minimal copies). The system architect has to find the best compromise between these fundamentally opposing requirements.

it is a value that is given in a another table

The IPC was originally known as the Institute for Printed Circuits, however later became to be known as the Association Connecting Electronics Industries. The IPC is a global trade association dedicated to furthering the competitive excellence and financial success of its members, who are participants in the electronics industry. The IPC has developed a standardized set of industry developed and recognized documents for use in the electronic manufacturing process.

It identifies you. It gives some information about the person. It is not a count or a total or an average, or any numeric kind of information. While it does have the word number in it, it is not counting anything. You never add social security numbers together, or get the average social security number or do any other such numerical calculation with them. You do that with quantitative data.

The importance of computerization is that it improves efficiency. Information can be shared centrally in a database. Tasks are processed at a very high rate.

I think all of those steps are in the scientific method

information

Brand computers usually has a concealed sector where installed the original operation system. Your so-called Instant Recovery is to pretty much erase everything you have in your computer(virus included) and it loads with the the operation system just like when you first bought it.

Working as a SAP BO - what? Consultant? Developer? Certainly there is a future for SAP BO, else SAP would never have purchased the technology in the first place. Therefore anyone supporting SAP BO in the marketplace will have a future. Salary? Expect an enttry level salary in the high 50K in U.S. dollars depending on geographic market. With experience, expect between $80K and $110K. Salaries assume your academic perfromance is above average and includes demonstrated STEM rigor.

I had the same problem and managed to resolve it. You may try this too.

"Completely" cleaned up all the existing java installs: Brought up windows in safe mode, and deleted C:\Program files\Java\jre1.6 folder. Restarted in normal mode. Used "Windows Install Cleanup" and removed the Java Runtime installation. This removed the listing under Add/Remove software but the icon in control panel stayed. Then used CCleaner to clear out all the unwanted file and also to cleanout unwanted registry entries. There were plenty of entries that had to be cleaned. However, I still had to manually remove \\HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft (You may rename if you want to be cautious).

After this I restarted the machine (this is important) and reinstalled JRE6U16 from the offline installation package that I had downloaded earlier.

The installation went without a hitch and now everything is fine. The Java control panel is also behaved as expected.

Hope this helps.

type this(with any enter or space in it):

@echo off
echo happy birthday
pause
end


you can edit the happy birthday as you like it but keep the "echo"
what happens if you run this: a CMD window will open and says:


happy birthday
press any key to continue...


if you press a key the file closes
if you typed this in notepad, save it as a .bat file (suppose you knew this)
to make it more attractive you could change the colors of the screen and the letters like this:


color 02
@echo off
echo happy birthday
pause
end


the first number (or letter) behind color is the background color, the second is the color of the letters this gives you a black background and green letters. to check all color type "color help" in CMD. it will give you the letters and numbers for the different colors

In 3 tier architecture, client directly interacts with intermediate server and intermediate server will directly interact with database server.