Explain "Relational" database, in layman's terms. How is it different from typical databases?
A database can be thought of as a set of logically related files organized to facilitate access by
one or more application programs and to minimize data redundancy. This concept does not imply
that all data relating to a company's business should be contained on a single database, but simply
that all records in a database should be related and that redundant data should be minimized.
Relational database are 'typical' databases. In the 1960's network and hierarchical databases were
used. In the 1970's Codd proposed the relational model and this system has been the standard
ever since. In the mid 1980's SQL became the standard language to access relational databases.
Why do I need one? When do I NOT need one? Cross-over point?
Quite simply you need one when the advantages below out weigh the disadvantages.
Explain the advantages. Explain the disadvantages
- Speed of execution
- Reduced data redundancy
- Reduced updating errors and increased consistency
- Greater data integrity and independence from applications programs
- Improved data access to users through use of host and query languages
- Improved data security
- Reduced data entry, storage, and retrieval costs
- Facilitated development of new application programs
- 24/7 accessibility anywhere in the world
- Initial database design is complex and time-consuming
- Hardware and software start-up costs
- Damage to database affects virtually all application programs
- Conversion costs in moving form a file-based system to a database system
- Initial training required for all programmers and users
I can use almost any Microsoft software package to sort and find my data I need now so
what is the advantage of a database system?
The advantages and disadvantages listed above also apply to Microsoft's software.
Is my data safe? Security statements
Your data is as safe as you want it. Security costs money. Security for a bank
holding millions of customer's fortunes is more elaborate than a company's needs that stores
manufacturing information. Reasonable security measures are quite affordable.
Will the program run in a Windows environment?
Absolutely, as well as on a Macintosh or Linux based operating system.
Is it portable? Can I use it remotely? Will it run on laptop?
It is highly portable if designed with a web interface. It can be run in the middle
of the Pacific Ocean.
Updating or adding data. Is it simple? Can I merge files?
Updating and adding data as well as merging data are all simple SQL statements to the database
that the user doesn't need to know how to do anything but click on a "Submit" button.
Reports, how do I get them? Can I change or customize the reports?
Reports are part of the database design. Essentially, there are two forms the customer
needs to bring to the table with the database designer: Input Forms (for inputting data and editing
in the database) and Output Forms (Reports)
Changing or customizing a report typically is done by the programmer. However, data can
be easily exported into other applications such as Excel for data manipulation and presentation..
Explain cost aspects, ROI, cost of ownership, etc.
Often a company realizes a ROI in one year or less. With databases come maintenance, these
costs can be minimized if the database is properly designed and implemented. Upgrades only
occur when the company decides to add to or improve the existing design. The ownership
transfers with the initial sale and the only on-going costs are database maintenance.
There are many firms selling this type of product, why is yours better?
Many developers are using yesterday's technology when no longer required and the customer is
paying for it with ongoing maintenance as well as licensing fees for the use of the software.
Over the past few years, hardware costs have seen an extreme and drastic drop in price. Small
companies can now afford the same hardware solutions as a large company could only a few years
ago. Hardware costs are now only a fraction of what they once were and are now only a
small part of the overall project solution costs.
Since JAD uses open source software tools, which are free, the customer is only paying for the
design and development of the database. Because JAD uses open source free software programs
and does not over sell your hardware needs we can offer our services several times below the
We 100% design to the customer's requirement instead of making him fit into a packaged solution.
We offer an extensive engineering background and have many years experience in high technology
manufacturing environments. Our background is key to understanding a company's processes.
We provide an extremely user friendly interface that is easy to navigate thru and the
functionality becomes second nature to the user, therefore we can provide free initial
training on all of our products.
| Sunday November 18, 2018
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