Inf3707 notes Study guides, Study notes & Summaries

INF3707 - Database Design & Implementation Summary - covers the entire module. Great for assignments and exams, document is searchable. The work has been done for you :-)

This summary contains in depth concepts, explanations and examples which will not only allow you to reduce the amount of time you have to study, but will also assist you with getting a distinction for this module. This summary will replace your prescribe book entirely!

MQC 1.1 b.View – virtual table, not table on its own but mirrors table(temp table). Multiple tables – complex, single table – simple. In addition, the function and GROUP BY clause prevent changing the displayed data because each record might represent more than one row in the underlying key-preserved Reasons for view table – security, not direct DB access, efficiency – less direct DB hits table. CH. 13, text book pg 517 e-book pg 539 1.2 c. _ and % allows white characters - _ a...

Arithmetic Expressions You may need to modify the way in which number and date data are displayed, or you may want to perform calculations or look at what-if scenarios. These are all possible using arithmetic expressions. An arithmetic expression can contain column names, constant numeric values, and the arithmetic operators. Available arithmetic operators - + Add, - Subtract, * Multiply, / Divide. You can use arithmetic operators in any clause of an SQL statement, except the FROM claus...