INB/N210 Week 1 Notes.docx

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Course
ENB352
Professor
Richi Nayak
Semester
Spring

Description
INBN 210 Database NotesWeek 2Tables are used toadd data stored in tables also know as relations6 rules for tables1 No two rows are exactly the same no duplicates o A set cannot contain thte same thing more than once Eg 1223 isnt a set 123 is a set 2 Order of the rows has no effect on the meaning of of the data o Eg John Andy Sue is the same as Andy Sue John 3 Order of columns has no feectmeaning of data 4 Each cell in the table contains only a single value 5 Each column has a distinct name 6 Values in each column are sensible given the columns name Domains The range of allowable values for a given column2 Major differences between columnsdomainsA domain is a set ser fo allowable values Whereas a column is a set of values that are actually being usedA columns values are actually stored as part of each table in the databaseA dom
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