In a table each column attributes are independent, In a table row order & column order are mandatory & that cannot be changed, Table can be of more than 2 dimentions, There may be of rows and columns duplication in a table. Relation: In a Relation in which all attributes are dependent in one or the other way, The row and column orders are not considered, Relation is always 2 dimentional, There cannot be duplication of rows and columns in a relation There is no difference they both refers to the collection of rows and colls which used to store data.
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Table The physical instantiation of a relation in the database schema. Relation A logical construct that organizes data into rows and columns.
A table is essentially a two-dimensional matrix. But, a relation need not be so.
Relation: In Database a relation represents a table or an entity that contain diffrenet attributes.An Entity constructs a relation(table) in DBMS . Relationship: In Data base relationship is that how the two entities are connected to each other ,i.e what kind of relationship type they hold between them.Primary/Foreign key is used to specify or hold this relationship. By Tanzeel Ur Rahman Bhatti
Datafile is a group of files in each table space in an Oracle database. Database files are all files that are found within the database.
truth table gives relation between i/p & o/p. excitation table is use for design of ff & counters.
Table is where the data is stored and in a well designed schema a table represents some real world object such as CUSTOMER, ORDER, etc., Now the real world objects have relationships. For example, a CUSTOMER has many ORDERS. To represent this relationship a database relationship was invented.
its used to creat and modify the structure of the table
A primary key is an attribute (or combination of attributes) that uniquely identifies each row in a relation. A primary key is designated by underlining the attribute name. The primary key of an entity set allows us to distinguish among the various entities of the set. A foreign key is an attribute in a relation of database that serves as the primary key of another relation in the same database.
query takes a table and given the criteria entered into it it displays the results that meet that search. While a report just spits out a table in the database
The RELATION/table has 9 ATTRIBUTES/columns, and there are 200 TUPLES /rows in the RELATION/table.
In DBMS, a relation instance refers to a particular set of data rows within a database table at a given point in time. It represents the actual values stored in the database for that specific table. Each row in a relation instance corresponds to a record or tuple within the table, containing values for each attribute.
A table is contained within the database and consists of columns and rows. A table is meant to store data and, in relational databases, are related to other tables within the same database.
Database Instance The term instance is typically used to describe a complete database environment, including the RDBMS software, table structure, stored procedures and other functionality. It is most commonly used when administrators describe multiple instances of the same database.Also Known As: environment Examples: An organization with an employees database might have three different instances: production (used to contain live data), pre-production (used to test new functionality prior to release into production) and development (used by database developers to create new functionality). RELATION SCHEMA A relation schema can be thought of as the basic information describing a table or relation. This includes a set of column names, the data types associated with each column, and the name associated with the entire table. For example, a relation schema for the relation called Students could be expressed using the following representation: Students(sid: string, name: string, login: string, age: integer, gpa: real) There are five fields or columns, with names and types as shown above.
Database table objects store data. Form objects used by applications provide a visually pleasing or sensible way of accessing or updating data contained in the database tables. This means that the form object is a display specification.