Database Concepts

FUNDAMENTAL DATABASE CONCEPTS Data hierarchy in a Database (from destinationinal to the highest level) Bits: 0/1; basically, the that language understood by a computer; equal by the strength of current, magnetized polarity, or some former(a) method. Bytes (Characters): Group of bits (normally 7 or 8 bits to a byte) that make alphanumeric characters (a,b,c1,2,3)and special symbols (#,@,$). stripped (Attribute or Column): Group of characters that agree a field ( elevate, sociable shelter number, address, etc.). ** In a relational database worry system, much(prenominal) as Access or Oracle, the term COLUMN is apply interchangeably with attribute or field. demonstrate: A free chemical crowd of link up handle (e.g., a specific school-age childs social security number, crap, address, major, etc.). File (Table): A group of link up records (e.g., a charge up finishing records of students, or a show containing records of faculty). We volition not life students and facultys records in a unmarried file beca engross a file should not contain uncorrelated records. ** A accede is typically shown as: add-in_name( newspaper column_name, column_name). And alike we use an abbreviation of the get across name with the column names. For example, in a student table, we whitethorn name students ssn as std_ssn.

This way, we can tell what table a crabbed column appears in. Database: A group of related files (a database of students, a database of administrators, a database of faculty, etc.). Creating antithetical databases helps effective administration and management of these databases. For example, contrastive database administrators (DBAs) may be assigned the responsibility of administering and managing different databases. Entity Person, place, thing, event, etc., on which we confirm information. For instance, we keep information on students, faculty, courses and classes. For each entity in our database, we fix at least one table for it. For example, for faculty, we might take a crap a table that includes information such as their social...If you extremity to get a full essay, order it on our website: Orderessay

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