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Can a Database contain two identical records without negative effect on the integrity of the database Why or why not?
Sure, not an issue but it will mean you can get multiple hits for the same query. You have to take that into account in your program.
Guidance is to have a unique key for every table but that is not a requirement.
Think of an example where you are using a database to collect poll answers. All you have is the answers from all people, no unique information from the persons because that is not important to your survey.
Or, say you keep information in that same table of location of the city where the survey was taken it. There is a possibility that more than one row will have the same data.
You can get meaningful information from the database.
What else can I help you with?
What are the differences between positive and negative databases?
There are two different contexts is which these terms are used; the first is regarding "reputation", a positive database contains entries correponding to entities with good, or at least not bad, reputation. A negative database has the entries corresponding to entities with decidedly bad reputation. In the second context, a positive database is what you normally thing a database to be, say entries containing names and credit-card numbers; a negative database contains all of the possible entries not included in the positive database, i.e., all possible name-creditcard combination except the ones in the positive DB. In fact a negative database has all possible character combinations (or for that matter bit combinations) of a given length that are not present in the negative db. This scheme has a potential for data security and personal privacy.
How has the use of electronic database affected the airline industry?
negative one half
What are negative aspects of developing a DNA database?
Some negative aspects of developing a DNA database include privacy concerns, potential misuse of genetic information, and the risk of creating a discriminatory society based on genetic data. There are also ethical considerations regarding consent and the security of storing sensitive genetic information.
What db has no sound?
dB is a logarithmic scale, so the answer, basically, is negative infinity.dB is a logarithmic scale, so the answer, basically, is negative infinity.dB is a logarithmic scale, so the answer, basically, is negative infinity.dB is a logarithmic scale, so the answer, basically, is negative infinity.
What is a photo negative scanner used for?
A photo negative scanner is used to scan negatives. Scanning negative photos is used to create digital images of standard photos. These images can be used for recreating the images, or for storage of images in a database.
If records in a database are stored using a key which is one byte long how many records can the database store?
If the key is one byte long, then there are 8 bits that can be positive or negative. With all permutations of 8 bits, that leaves 2^8 (two to the eighth power) possibilities, which is only 256 total unique values.
What are the advantages and disadvantages of a negative database?
i would honestly ask someone who is highly skilled in computers to give you this complex answer i don't know the answer but i can say someone who knows a lot will give you the correct answer to your question
What are the data types would be used to store a whole number?
bit, int, numeric(8,0) depends on which database you are using
Should a database of people paroled or released for crimes be made public?
Making a database of people paroled or released for crimes public can promote transparency and community awareness, potentially aiding in public safety. However, it also raises concerns about privacy, potential stigmatization, and the risk of hindering reintegration efforts for former offenders. Balancing public interest with individual rights is crucial, suggesting that any such database should be carefully regulated and possibly restricted to relevant authorities or specific cases. Ultimately, the decision should consider both the benefits and the potential negative impacts on individuals' lives.
What is a field length check in a database?
Most database field types have an inherent data length limit, however the business rules of the application may require a lower maximum limit on the field. For example, an integer field may hold positive and negative values in the hundreds of thousands or more, but if the field is designed to hold the price of something, it makes no logical sense to permit values that high if it is for items in a supermarket.
What is the net field midway between the two identical negative charge?
Electric field at the mid point between the two identical negative charges will be zero. In the same way, if both charges are of identical positive, the field at the mid way will be zero.
What is signed column?
A signed column in a database or data table refers to a column that can hold both positive and negative numeric values. It is typically used for storing values that can represent debts, temperature changes, or any other scenarios where negative values are meaningful. In contrast, an unsigned column can only hold non-negative values. The "signed" designation indicates that the data type includes a sign bit to accommodate these negative values.
