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Database design
Database tables will be created for you on the Technology web server. The schema will be as follows. Please note that this is a simplified database structure, designed to make it straightforward to implement the assignment on a basic level; you can modify this or add additional tables if you wish. Only the first two tables are absolutely essential to implement a bare pass solution.
sc_users table
Records users in the system, and whether they are an administrator or a regular user.
ID INT PRIMARY KEY
isadmin TINYINT
name VARCHAR(255)
username VARCHAR(255)
password VARCHAR (255)
dayofbirth INT
monthofbirth INT
yearofbirth INT
filmshowings
Records the current film showings.
film VARCHAR(255)
date VARCHAR(255)
time VARCHAR(255)
screen INT
maxtickets INT
certificate VARCHAR(5)
mybookings
A table which can be used if you wish to implement code to allow users to view, change and cancel their bookings. Not required for a bare pass answer but useful for more advanced answers.
username varchar(255)
showingID INT
ntickets INT
Define a view and a trigger. Construct a view for the above relations that have the information about suppliers and the elements they supply. The view holds the S#, SNAME, P# , PNA
Benefits: It limits data access. It makes difficult queries look easy. It permits data independence. It presents dissimilar views of the similar data.
Give short note on the following terms:Dirty pages and ETL a.) Dirty pages. These are buffer pages which comprise modifications which haven't been written to disk. b.
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Differentiate between a Global and a Local temporary table? - A local temporary table exists only for the duration of a connection or if defined inside a compound statement, fo
what is cascading rollback
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Differentiate between natural join and outer join? Natural join is a binary operator which is written as (R * S) where as R and S are relations. The output of the natural join
Homework chapter 10 no 3
What is abstraction? Abstraction in the object orientation is a idea that provide opportunity to express necessary properties of object without providing much details of the im
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