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Database Programming
Databases are collections of tables that maintain and display information, often collaboratively; this information can be used for interaction with an application or gaining general knowledge. Questions about database engines and modifying or using them belong in this category.
8,803 Questions
Can you give me an example of a paper database?
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
Why must a database have a unique field name?
it is necessary bcoz others may not copy it n it also shows individuality
What is a character attribute?
A character attribute refers to a quality that a person possesses, such as funny personality or a kind heart.
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
What data is mandatory for updating the Capital Reporting Record?
Serial Number, Part Number, Cage Code, Acquisition Date, Acquisition Cost, and Fund Designator
First Normal Form (1NF) is a property of a relation in a relational database. To be in 1NF, each attribute in a table must be atomic, meaning it cannot be further subdivided. Additionally, each attribute must contain a single value, not a list or set of values.
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.
may be this will help you - http://www.sqlservercentral.com/Forums/Topic271276-5-1.aspx#bm271295
Here is what happened, my family had a computer. Then we moved out to Pennsylvania and got a new one, then for Christmas we got another one. So we have three computers, problem is one of them has a virus that prevents us from getting on the internet and the anti-virus needs to be updated to fix the problem using the internet. During the move we lost the windows xp opperating disk. So what im trying to do is get Linux, the freeware operating system onto a disk and moving it to the computer to install Linux so we can use it again. But, I don't want to install it Linux on the computer that I put it on the disk from. So I want to know, can I get Linux on a disk without instaling Linux on the computer that I put it on the disk from. Please if you know how tell me I'm desprate.
~rhilly11(the asker of the question)
How do you convert the 1db to dbm?
dBm is defined as power ratio in decibel (dB) referenced to one milliwatt (mW). It is an
abbreviation for dB with respect to 1 mW and the "m" in dBm stands for milliwatt.
dBm is different from dB. dBm represents absolute power, whereas in audio engineering the decibel is usually a voltage ratio of two values and is used then to represent gain or attenuation of an audio amplifier, or an audio damping pad.
Derived horizontal fragmentation and mixed fragmentation?
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
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...
Difference between entity type and entity set?
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.
How Hierarchical Structure differs from Network Structure?
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.
What are the two types of fragmentation Illustrate them with block diagrams?
Ans) In computer storage, fragmentation is a phenomenon in which storage space is used inefficiently, reducing capacity and often performance. Fragmentation leads to storage space being "wasted", and the term also refers to the wasted space itself.
There are three different but related forms of fragmentation: external fragmentation, internal fragmentation, and data fragmentation, which can be present in isolation or conjunction. Fragmentation is often accepted in return for improvements in speed or simplicity.
Internal fragmentation: Due to the rules governing memory allocation, more computer memory is sometimes allocated than is needed. For example, memory can only be provided to programs in chunks divisible by 4, 8 or 16, and as a result if a program requests perhaps 23 bytes, it will actually get a chunk of 24. When this happens, the excess memory goes to waste. In this scenario, the unusable memory is contained within an allocated region, and is thus termed internal fragmentation. Slack space is a very important source of evidence in computer forensic investigation.
External fragmentationExternal fragmentation arises when free memory is separated into small blocks and is interspersed by allocated memory. It is a weakness of certain storage allocation algorithms, when they fail to order memory used by programs efficiently. The result is that, although free storage is available, it is effectively unusable because it is divided into pieces that are too small individually to satisfy the demands of the application. The term "external" refers to the fact that the unusable storage is outside the allocated regions. External fragmentation also occurs in file systems as many files of different sizes are created, change size, and are deleted. The effect is even worse if a file which is divided into many small pieces is deleted, because this leaves similarly small regions of free spaces.
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Comments
Start with all memory available for allocation.
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Allocated three blocks A, B, and C, of size 0x1000.
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Freed block B. Notice that the memory that B used cannot be included for an allocation larger than B's size.
Characteristics of data warehouse?
Hi,
1. Subject Oriented
2. Integrated
3. Nonvolatile
4. Time Variant
Explain three disadvantages of centralized database and distributed database?
what are the disadvantages of centralized database system
Draw and label block diagram of a digital switching exchange?
picyure of a block diagram of a computer
What is the difference between primitive and non primitive data structure?
A primitive data structure is generally a basic structure that is usually built into the language, such as an integer, an array or a linked-list.
A non-primitive data structure is built out of primitive data structures linked together in meaningful ways, such as a binary search tree, AVL Tree, Hashtable, etc.
How do you convert from dBm to dBi?
Well, the question your asking is basically impossible. It's like asking to convert a gallon of water into cans of pop. It is possible to convert the gallon of water into cans of water not soda. So you can convert dBm to watts, not dBi.
What is a wildcard on a database?
When You can search for how many people say like coke on a database
