Database Programming

Definition of a transaction:

1. the act of transacting or the fact of being transacted. 2. an instance or process of transacting something. 3. something that is transacted, esp. a business agreement. 4. Psychology. an interaction of an individual with one or more other persons, esp. as influenced by their assumed relational roles of parent, child, or adult. 5. transactions, the published records of the proceedings, as papers read, addresses delivered, or discussions, at the meetings of a learned society or the like. Hope this helps but if not broaden your question.

This is a very simple explanation.

A database is a collection of schemas.

A schema is a collection of tables.

A table is a collection of possibly unlimited rows organized into fields or more commonly called columns. Think of a spread sheet.

For example an inventory table might have columns ITEM_NUMBER, ITEM_NAME, and ITEM_QUANTITY.

ITEM_NUMBER is defined to store only whole numbers

ITEM_NAME is defined to store only letters and numbers up to the length of 20

ITEM_QUANTITY is defined to store only whole numbers

Here is some possible sample data

ITEM_NUMBER * ITEM_NAME * ITEM_QUANTITY

1001 * Washer Brass * 5044

1002 * Screw 4x40 stainless * 5027

1003 * Screw 6x40 stainless * 4947

So, to answer your question, a database column (or field) belongs to a table and has attributes that describe the column and what can be stored in the column.

Most companies keep track of their employees, their sales, inventory, etc etc. Pretty much every website that has you log in or post content stores all that information in a big database.

Single-valued attributes can have only one value

style sheet

what i think,regrding the different types of DBMS based on the type of organisation of data are: 1)An Enterprise DBMS which is designed for scalability and high performance. It must be capable of supporting very large databases, a large number of concurrent users, and multiple types of applications. 2)A Departmental DBMS, sometimes referred to as a workgroup DBMS, supports small to medium sized workgroups within an organization, and typically runs on a Unix, Linux, or Windows 2000 (or NT) server. 3)A Personal DBMS is designed to be used by a single user, typically on a low- to medium-powered PC platform. A personal DBMS product is suited only for small scale projects and should not be used to deploy multi-user applications. 4)A Mobile DBMS is a specialized version of a departmental or enterprise DBMS. It is designed to be used by remote users who are not usually connected to the network(eg:laptop or handheld device, such as a Palm PDA or PocketPC). Furthermore, the mobile DBMS provides a mechanism for synchronizing remote database changes to a centralized, enterprise or departmental database server.

-File structure is defined in the program code.

Bob made a transaction through his bank account, spent it all on waffle cones, and had to file bankruptcy because he bought an island as well as over four million waffle cones.

255 max for text

Modern databases do not have a preset number of fields. Rather, the data architect determines the needed tables and number of fields per table and declares that to the database software. Fields can--with some restrictions--also be added and removed later as needed. That said, each database application does have a maximum limit on the number of fields per table and the number of tables per database, which information has to come from the database manufacturer. But those limits are usually vastly greater than anyone might want. It is part of a computer and it has many fields.

can you give mna an example of an paper based data based?

well i don't know so that's why im up here so i will take a guess so i think it is reacions are that what u feel.thank u if its wrong jus call me at 252-933-6898

it is necessary bcoz others may not copy it n it also shows individuality

A character attribute refers to a quality that a person possesses, such as funny personality or a kind heart.

You can sort the results of a query by using the order by clause.

Ex: Select * from tbl_employee order by emp_num

The above query would sort the results by the employee number and display them. The default sort is ascending order.

Ex: Select * from tbl_employee order by emp_num desc

The above query would sort the results by descending order of employee number and display them.

Serial Number, Part Number, Cage Code, Acquisition Date, Acquisition Cost, and Fund Designator

I think you should just save it as something else and then delete the original. Maybe you could just go through my documents, right click on the document/database and click rename. You should then type what you want the name of it to be.

Hope this was helpfull

A network structure is more a star topology whereas a Hierarchical structure is like a tress... Allowing you to drill down to get to an answer.

no

a relation R is in 4NF if and only if,whenever there exist a MVD in R, say A->>B, then all attribute of R are also FD on A.

C.J Date

by zahir shah MSCSype your answer here...

lets understand them all:

1.An Entity is a real world "thing" which have independent existence.

2.Entity type is a category.

3.entity type is strictly calling, "an instance of entity type".

4.An entity type defines a collection of entities that have the same attributes.

5.Entity set : the collection of all entities of a particular entity type in the database at any point of time is called Entity set.

sequential connectives are connectives you use in explanation text.

Horizontal Fragmentation splits tables by rows. It differs from Vertical Fragmentation in that the relationship between key columns and non-key columns remains the same. The content of the tables differ by key value.

Horizontal Fragmentation is the classic distributed data base design approach. For example, you only allow customer data for the western region to enter the database in the Los Angeles office. The customer data for the eastern region can only be entered in the New York office's database. The Rule of Reconstruction dictates that no overlaps can be allowed by key content. In this case customers cannot be shared for update between the Eastern and Western offices.

Cheenu Gawri

The main advantage of a join is that it executes faster. The performance increase might not be noticeable by the end user. However, because the columns are specifically named and indexed and optimized by the database engine, the retrieval time almost always will be faster than that of a subquery. There are also inner and outer joins, left and right joins, full joins and cross joins.

Tuple is a collection of one or more attributes or rows present in a table.