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ICT330 Database Management Systems SUSS Assignment Example Singapore

The course focuses on the theory of relations as applied to models that represent data. The student will gain an understanding of database systems concepts, specifically how they are used in both read-only and updatable databases

The ICT330 Database Management Systems provides students with a thorough introduction to these complex technologies through lectures about different types or classes (e.gsets) which exist at higher levels than individual instances; relations among tables within given domains can also be studied using this type of abstraction.

In this practical lab session, you will learn how to use the SQL language for data definition and manipulation. You’ll also explore various methods of implementing these in your database management systems such as views or triggers. Multi-user database systems are a very important part of any business. These courses will cover the administration and management of these systems, including how to work with concurrency issues as well as security measures such as backups or recovery options in case something goes wrong.

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Learning Outcomes In ICT330 Database Management Systems SUSS assignments

You will be required to answer these questions in the ICT330 Database Management Systems SUSS assignment. If you ever receive such an assignment, do not hesitate to contact us for help with your studies here in Singapore.

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Assignment Brief 1:  Apply database processing concepts to solve the information requirements of organizations

The base requirement is to classify the records for each type of organization. The way to work with this question is first to figure out what your organization needs. To do that you first need to understand the problem that’s the focus of the issue. For example, if there were a thousand or more classes then you would have multiple attributes or columns for different types of organizations and defining classes might not be necessary. Supposing they’re just one hundred at most, defining classes can simplify matters tremendously. In general, it’s a good idea to start with an initial understanding of what data is going to be available before deciding on how they’ll be used so as to set the expectations appropriately from the beginning and avoid disappointment later on in retrospect without being able to draw the necessary conclusions for lack of information.

New entities are defined by the total number of attributes they have, so it’s somewhat counterintuitive that if you divide up all the records into five classes equally there’ll be eleven classes afterward since four new ones are being created out of combinations of existing ones according to their types.

Assignment Brief 2: Discuss table structures according to normalization principles

Table structures and the normalization principles that guide them are a bit like highway maintenance. You can go with low-maintenance and safe (but congested) streets, or you can take your chance with high-maintenance highways. But it doesn’t matter at what point one chooses to convert, all roads will eventually lead to ruin. Tables should be normalized so as not to require future indexing work for data retrieval, because every time an index has been built specifically for any table manipulation successively this table structure is now more cumbersome, at least the retrieval part of it, than if we had just let it be and used and indexed unconverted primitives instead. 

Normalization is a way to design databases so that tables can be referenced from other tables without repeating data. In the Redundant Data anti-pattern, fields of one table are copied onto another table.

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Normalization reduces redundancy and improves efficiency because it removes duplicate data from the database. There are six steps a database must take to go from a redundant design pattern to a normalized design pattern. The steps are:

  1. Decompose all large tables into smaller, related tables.
  2. For each table, declare each field (column) and the data types of the values it can contain (domain).
  3. Associate one table with another by creating a relationship between two fields in two different tables. This establishes the “one-to-many” relationship between the two tables.
  4. Decompose the “many” side of any relationship into two or more tables.
  5. For each table, declare the primary key(s). The primary key is a minimal set of fields (one or more) that uniquely identifies each row in the table.
  6. When all relations are established, eliminate the original table. Each relationship references the primary key of the related table to connect it with another table, and these references become the foreign keys in those new tables.

Assignment Brief 3: Construct conceptual (ER diagram) and logical models from a statement requirement to solve common design problems

Applications are the most common problem domain for which ER diagrams are used today. They require a large amount of data to be stored, and it is difficult for most users to tell different types of data apart with any clarity. ER diagrams help by visualizing relationships between application objects in a two-dimensional matrix or multi-colored diagram that resembles an organizational chart. 

Logical models are needed when multiple people must work on, change, or understand one project – they outline the rules that govern each type of item in an application’s design. This way everyone involved has agreed upon what items are necessary for any given project – before construction begins. The goal is that logical models will keep track of the objects while physical hierarchies describe the ways that objects are related.

Logical models are best known under the name entity-relationship diagrams or E-R diagrams for short. This shows the most important aspect of these types of models – they connect elements together.

ER Diagrams help organize applications by showing how each part is related to one another in a given system. They are particularly useful to business analysts and software engineers for creating relational databases, but they also help explain to users which objects in an application will be involved in helping them complete a given task. 

Assignment Brief 4: Explain and apply concurrency controls, security, and recovery measures.

Concurrency Control ensures that a database user’s request for data access is honored only if no other process has requested the same data at the same time. This means that when anyone person is reading or writing to a file, no one else can read or write to it without causing inconsistencies. For instance, concurrency controls would ensure that when someone writes to a bank account in an accounting system, all other readers of the account see this new balance and then go into “read-only” mode and prevent colliding concurrent reads and writes from happening against this file. One can maintain this level of control by enforcing transactions where different functional components communicate through interaction points controlled through limited entry queues whenever possible rather than having them all try to access the same data at the same time.

Concurrency Control is an effective way of maintaining data integrity and avoiding deadlocks in a multi-user, multi-task environment.

Assignment Brief 5: Formulate SQL statements to implement and query database systems

Queries against databases are performed using SQL statements, which either produce a result set or modify the content of the database. Above all, one should remember to encode ROLE commands in plaintext when connecting data sources with sensitive data types.

SQL statements for modifying data are known as DML (Data Manipulation Language) queries. Examples include inserting new rows into a table, updating columns within existing rows, deleting rows from tables, and altering row content with an UPDATE query. On the other hand, SELECT queries are used for retrieving information from database tables using different operators. These include comparison operators such as = or > which compare two values on either side of the operator; grouping operators such as IN or BETWEEN that combine multiple comparisons; and Boolean operators such as AND or OR for combining multiple expressions.

Assignment Brief 6: Implement business rules via views, stored procedures, and triggers

Stored procedures are the best way to implement these rules. They’re more efficient, they can be used for bulk data modifications, has better security and it is easier to show cause. If you want to use views or triggers it would require unnecessary outside knowledge on behalf of developers who are responsible for setting up your database infrastructure which leads to very complicated setups over time if the database needs scaling. View’s limitations include not being referentially consistent with each other or themselves often because they only query data that one started might have created, rather than querying data that was there at the beginning.

Business rules are actions or calculations that must always happen in a certain order, for example correctly calculating the total cost of an order based on the contents of each cart. Business rules are different from business logic – which is programming that happens on the back end – because they have to be executed before action is requested.

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Assignment Brief 7: Demonstrate the basic techniques of concurrency control and ACID

There are three techniques of concurrency control to maintain integrity, availability, and consistency for database transactions. They are read committed, snapshot isolation in Oracle, and serializable in SQL Server. With read committed isolation in databases like MySQL or PostgreSQL, two concurrent transactions can affect the same data that may lead into errors when one succeeds while the other fails. Snapshot isolation in databases like Oracle can take a “snapshot” before executing any updates to make sure all are applied atomically. Serialization in databases like SQL Server ensures an update is taking place without making progress on another transaction before it commits both serve as major points for consideration when choosing between them for your company’s needs.

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