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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
What is the primary characteristic of a key field as that it must be?
It must be at least regular as well as totally ordered. To be totally ordered, the key field must be of a type that provides all six comparison operations (<, <=, >, >=, == and !=). In some implementations, the less-than operator is all that is required for total order because all other comparison operations can be expressed in terms of this one operator alone:
a>b is the same as saying b<a
a>=b is the same as saying b<a AND NOT (a<b)
a<=b is the same as saying a<b AND NOT (b<a)
a==b is the same as saying NOT (a<b) AND NOT (b<a)
a!=b is the same as saying a<b OR b<a
you might be referring to batch, but your question is unclear.
What is the data schema in a database?
Logical Structure of database is know as database schema. All database entities are defined and relation between then is represented in structured way. It includes all constraints to be apply on each identity.
Draw a context-level 0 DFD for computer point of sale processing?
no i cant but l need the answer Quickly .......
What do you mean by data warehouse?
Data warehouse is a house where current as well as historical data can be stored.
What is the current trend of sensex?
oct 2010 goes to 22000
Nov 2010 slips to 23000
dec 2010 slumps to 19000
jan 2011 thumps to 16000
june 2011 at 14000 looking for next ride
What type of crop fields depend on migrant farmworkers?
a list of some are: raspberries, strawberries, blueberries, apples, cherries, potatoes, or anything that needs to be picked by hand, or sorted by hand
In southwest Louisiana they are used in the sugarcane and crawfish fields.
A root drive is when a SATNAV tells you to go to the main root , and what that means is when you found your main root you have gone straight to the root drive. And that what's root drive means.
What are the advantages of RAD modelling language?
Advantages of UML:
- it provides most of diagram types (14 diagrams in UML 2.2) needed for object-oriented analysis and design (OOAD)
- it is standardized (by OMG Group), not proprietary, supported by software industry
- is explained and described in every aspect by vast amount of publications, resources, textbooks, etc.
- it could be customized and extended for specific application domain, software process, or implementation platform.
What is the Advantages disadvantages of Distributed Operating System?
Advantages:
Performance: very often a collection of processors can provide higher performance and better price/performance ratio than a centralized computer.
Distribution: many applications involve, by their nature, spatially separated machines (banking, commercial, automotive system).
Reliability : if some of the machines crash, the system can survive.
Incremental growth: as requirements on processing power grow, new machines can be added incrementally.
Sharing of data/resources: shared data is essential to many applications (banking, computer supported cooperative work, reservation systems); other resources can be also shared (e.g. expensive printers).
Communication: facilitates human-to-human communication
Disadvantages:
Difficulties
Security problems: sharing generates the problem of data security.
of developing distributed software: how should operating systems, programming languages and applications look like?
Networking problems: several problems are created by the network infrastructure, which have to be dealt with: loss of messages, overloading.
How can you make a game using visual basic that uses key presses to move things?
try searching up like making tetris on youtube. I have seen some videos and they have you use keys to move the different pieces around
When would you choose to implement distributed databases rather than local databases?
I thought you were meant to answer this question????????????????????????????????
How convert BPM to BPEL with system architecture?
There are BPM Software vendors that have this functionality embedded. One of them that I can think of is PNMsoft that has an integration with System Architect
What is concatenate key in a relational database?
The concatenate key is simply the combination of several columns in a table, which serves the unique key of that table.
Recursive function in c to compute the number of nodes in a binary tree?
int Nodes (Tree *t)
{
int sum= 0;
if (t) {
sum+=1;
if (t->left) sum += Nodes (t->left);
if (t->right) sum += Nodes (t->right);
}
return sum;
}
You can determine symmetry of a data structure in two ways. One is when the stacks and queues data are put in the application and when the stacks are put in during run-time.
How are programs stored in a computer?
By stored-program computer, we mean a machine in which the program, as well as the data, are stored in memory, each word of which can be accessed in uniform time. Most of the high-level language programming the reader.
Advantages of traditional life?
A traditional life has several advantages. People have access to technology which makes life easier and have enough money to live contently.
What is the difference between a field guide and a dichotomas key?
A dichotomous key is arranged in steps with two descriptive statements at each step. It is a detailed list of identifying characteristics that include scientific names.
Whilst, a field guide is a book designed to help the reader identify wildlife (plants or animals) or other objects of natural occurrence. Hope this helps! :)
Where can you purchase a Chestnut-bellied Seed-Finch in the US?
I din't think you could buy these birds in the states, but this site says they have them. Hopes it helps. http://www.bluecuba.com/Price%20Lists/birdlist.html
