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Explain with examples different types of keys used in relational database, how they help relating different tables.
Explain each of three database models, hierarchical, relational, and object-oriented, and provide specific referenced example of each of these model types implemented in a functioning database
Compare activity (quite theoretical) of the disk (in number of bytes) required for each of both relational. Write down the advantages and inconveniences of new relational scheme.
One of the many problems with data redundancy is the likely occurrence of data inconsistencies-two different initials have been entered for the teacher named Maria Cordon.)
Imagine that you have been hired to fulfill their need of enhancing the data repository for their current reservation processing system. Upon reviewing the system, you find that the data structure holds redundant data and that this structure lacks..
Write down the SQL code in order to carrying out the following requests. Display all the data in each of the four tables. Do not display the foreign key columns.
What actions does a referential integrity constraint prevent from occurring when data is inserted in a table that contains this constraint?
Create a query that spans both tables. Eliminate redundant fields. Modify the Query to select only those Customers that had service dates in October and November 2006.
Consider a video game store. For each game, the database contains information about title, producing company name, designer(s) name(s), version of the game, type of the game and characters in the game.
Create a structurally sound relational database schema showing the minimum number of fields, tables, and relationships between the tables.
With the new UNSW timetabling system, the LIC of each course is required to specify what facilities they require in their classrooms as one of the inputs to the timetabling process. Write an SQL function to provide a list of rooms that contain a g..
optimize the query in the select script using Alter Table to add appropriate indexes. Also use Optimize and Explain to show how the performance of this query has improved.
How to decide which attribute should be there in the table and schema? How to identify the primary keys, foreign keys, domain, E-R diagram and 20 Queries on the same database.
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