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Define the Domain term in the context of Relational Model?
Definition: The domain of a database attribute is the set of all allowable values that attribute may assume.Examples: A field for gender may have the domain {male, female, unknown} where those three values are the only permitted entries in that column.
How are relationship between tables expressed in a relational database?
Tables are the basic building blocks of a relational database.
The sum of the values of a data set divided by the number of values?
Will gve the mean average of the data
How do you build a relational database in excel?
You dont
How are tables linked in a relational database?
They just are
What is made up of two values and relational operator?
A condition.
Difference between relational and logical operators?
Logical operators don't Compare values they combine Boolean values and produce a Boolean result. Examples of logical operators are && (and), , (or), ! (not). If you have two Boolean values and you combined them with the && operator the result will be (TRUE) only if both values were (TRUE). Relational operators compare two values and produce a Boolean result. Most of the time we use logical operators to combine the results of two or more comparison expressions that use relational operators.
What is a relational operator that yields values from all rows in a table is called?
'select' operator
Example of relational statements in C programming?
You mean relational operators?if (argc
Made up of two values and a relational operator in excel?
It could be an equation or an expression or a condition.
What is the difference between relational tuple calculus and domain calculus?
Relational tuple calculus has its variables range over tuples, where domain relational calculus ranges its variables over the field values, or domain elements. Both types of calculus are subsets of first order logic.
What type of operator can be used to determine wheter a specific relationship exists between two values?
Relational Operators
Explain what is meant by repetition of information and inability to represent information Explain why each of these properties may indicate a bad relational database design?
Repetition of Information is a condition in a relational database where the values of one attribute are determined by the values of another attribute in the same relation, and both values are repeated throughout the relation. This is a bad relational database design because it increases the storage required for the relation and it makes updating the relation more difficult. - Inability to represent information is a condition where a relationship exists among only a proper subset of the attributes in a relation. This is bad relational database design because all the unrelated attributes must be filled with null values otherwise a tuple without the unrelated information cannot be inserted into the relation. Regards, Jose Deleep. S
What are the distinctive features of a Relational Data Base?
Relational databases store data in tables with rows and columns, allowing for efficient data retrieval and manipulation using structured query language (SQL). They enforce data integrity through constraints such as primary keys, foreign keys, and uniqueness constraints. Relationships between tables can be established through keys, enabling data normalization to reduce redundancy and ensure consistency.
If an area was isolated by a localized distortion of spacetime could it have different laws of physics?
No, the properties inside the distortion would be consistent with universal values however the inter-relational values in the area of transition might be skewed.
Made up of two values and a relational operator?
Sounds like a Boolean expression: I'm outside AND getting wet > it's raining.
What do you mean by degree of relation in relational database management system?
It is the number of the attribute in the relation
