Database Design

Normalization of data helps in eliminating redundancy and inconsistency, reducing data duplication and update anomalies. It also ensures data integrity, making it easier to maintain and query databases efficiently.

A database cell is a single piece of data stored at the intersection of a row and a column in a database table. It represents the smallest unit of information that can be stored in a database. Each database cell typically contains a specific data value, such as a number, text, date, or other data type.

- It consists of a number of hubs that form geographical cells for connections.

- It uses point-to-point and multipoint connections.

- Users and devices can roam from cell to cell in the network.

A binary field that can store "files" of up to 255 bytes in length.

Equijoin - Joins two or more tables where the specified columns are equal. Returns only those records found in both tables.

Outer join - Joins two or more tables on the specified columns, returning all the values from table 1 regardless of whether they are in table 2.

Natural Join - Joins two tables on all like column names.

A Cartesian join is when you join every row of one table to every row of another table. While on occassion this may be needed I would argue that a properly constructred database would negate this. This is in fact a VERY hard hitting operation on your resources and should be avoided at any cost. A normal join will include the comparison of one or two fields between tables. While you want to limit the number of joins you have in a query a properly constructed join is not a big use on resources. This of course takes into consideration proper indexing and database construct.

Yes, the size of a rubber band can affect how far it will fly. Larger rubber bands typically have more elasticity and can store more energy when stretched, resulting in a longer flight distance compared to smaller rubber bands which may not have as much elasticity. However, other factors such as the force applied when releasing the rubber band and the aerodynamics of the object being launched also play a role in determining the flight distance.

Every database should contains values/datas represented in records(rows) and fields(columns). And records and fields stored in a table. So the main building blocks of a database is Table.

The name Noe is of Spanish, Portuguese, and French origin, derived from the Latin name Noah, meaning "rest" or "comfort." It is also a variation of the biblical name Noah, which means "to comfort" or "to rest."

As water is cooled, its density increases until it reaches its maximum density at 4 degrees Celsius. Below 4 degrees Celsius, water begins to expand as it freezes, which is why ice is less dense than liquid water.

In a physical database, a field is also called a column. It represents a specific piece of data that is stored in a database table, such as a name, age, or address. Each column typically has a data type that defines the kind of data it can hold.

The curvature of spectacle glass can be determined using a lensometer, which measures the curvature of the lens surface. The refractive index of spectacle glass can be determined by analyzing the way light passes through the lens and using equations that relate angles of light refraction to the refractive index of the material.

FASTA stands for "Fast Alignment Search Tool". It is a software package used for searching nucleotide or protein databases with a query sequence.

A query is how you extract information from a database, which is one of the main reasons we have databases. There are other kinds of queries, such as ones to add, edit and delete data and manipulate data in other ways and do other things with tables, but the ones that extract information are the most used.

A microwave communication link typically consists of a transmitter, a receiver, and an antenna at both ends. The transmitter converts the electrical signal into microwave signals, which are then transmitted through the antenna. The receiver at the other end captures these microwave signals through its antenna and converts them back into electrical signals for further processing. The link may also include devices such as amplifiers, filters, and antennas to enhance signal quality and transmission.

In a solid, molecules are tightly packed together in a fixed lattice structure. In a liquid, molecules are more loosely packed and can move past each other. In a gas, molecules are far apart from each other and move freely. In a plasma, atoms are stripped of their electrons, resulting in a highly charged state where particles move rapidly and are electrically conductive.

It will tend to increase, but this is not the case for all liquids.

The reason this happens is because as the liquid's molecules gain energy they exert force on their neighbouring molecules, which leads to the molecules becoming spread apart as the temperature increases. Conversely, when the molecules get colder and lose energy they exert less force on neighbouring molecules and so they get closer and the density increases.

However, in water this trend is true for all temperatures above 4oC, but not below 4oC. When water goes below 4oC the density starts to decrease. This is due the the oxygen being very electronegative, giving the water molecules a slight charge bias (the cause of effects like water tension) which makes them like little bar magnets. As the temperature drops the molecules become less able to overcome this slight charge bias, which pulls the water molecules into a shape like that of ice (which we know has a lower density than liquid water.

A collation character set applicability table is used to determine which character sets can be used with a specific collation in a database. It specifies which character sets are compatible with a particular collation for sorting and comparison purposes. This table helps ensure that the data is stored and retrieved correctly based on the collation rules.

Entity integrity ensures that each row in a table is uniquely identified by its primary key, preventing duplicate or null values in the key column. Referential integrity ensures that relationships between tables are maintained by enforcing foreign key constraints, preventing orphaned or invalid references between tables. Both constraints are important to maintain data accuracy, consistency, and reliability within a database system.

A database is considered self-describing because it contains metadata that describes its structure and organization. This metadata includes information about the tables, columns, data types, relationships, and other properties of the database. This allows users and applications to understand and interact with the database without needing external documentation.

"Plastic memory" refers to a phenomenon in which a material temporarily retains a deformation or shape after being subjected to stress, but eventually returns to its original shape once the stress is removed. This is often seen in certain types of plastics or materials that exhibit viscoelastic behavior.

The objectives of fact-finding include gathering accurate and reliable information, understanding the current situation or problem, identifying potential solutions, and making informed decisions based on evidence. It helps in uncovering the root cause of issues, determining the impact of different factors, and improving overall transparency in decision-making processes.

The foreign key is used as a reference in a table to the primary key of another table. For example: consider a table employee with id(primary key), name, address,department_id(foreign key) as its fields.Another table department with fields department_id(primary key) and dept_name.

So, department_id is primary key in department table and foreign key in employee table.

Join.