Foreign key

fact record only come from the source system once? * Is there a possibility that a row will become associated with a dummy dimension record because of edits? * Can changes or fixes to related dimensions result in the reassignment of dummy foreign keys to correct values? If the answer to all three of these questions is yes, then reprocessing may be required. The final test is to balance the cost of development versus the benefits of implementation. Is this type of error likely to occur, and

The primary key for the Store file would be the store number, or code. Some of the foreign keys would be; delivery dates, order dates, sales, and customer complaints. The Employee files primary key would be an employee number. The foreign keys for the Employee files would be; start date, wage, shift, employee address, paid time off, and absences. The Product file would have a primary key of product name, for example, Cherry Garcia. The foreign keys would be product type (ice cream/frozen

1. If I were to design Ben & Jerry's data warehouse I would use several dimensions of information. The first dimension would consist of the company's products; ice cream, frozen yogurt or merchandise. The marketing department has to know which products are selling, if Ben & Jerry's didn't know that their T-shirts are selling out as soon as they hit the stores, then they wouldn't be able to take advantage of the opportunity to sell the shirts. The second dimension would consist of the different areas

Unit 18 Task 1 - What are the benefits of a relational database? A benefit of a relational database would be that the data is only stored once. This means you don’t have to change multiple records and it doesn’t take up much storage space. For the veterinary practise this is ideal for them, as this is the main reason to why they’re changing from paper to Microsoft Access. Having everything on Access and not on paper means they can search for information quicker through the search bar and also it

Confidentiality. Confidentiality means to limit the access to information and access to only authorized users. This also means preventing accessing to unauthorized users. Protecting valuable information is very major part of the information security. A key component of confidentiality is encryption. Encryption makes sure that only the authorized person can have access to information. To implement confidentiality in your company most things to do is classification into different levels. Each security level

1. Create the TopLevelCust view described in Review Question 2. Display the data in the view. CREATE VIEW TopLevelCust AS SELECT CustomerNum,CustomerName, Street, City, State, Zip, CreditLimit FROM Customer 2. Create the PartOrder view described in Review Question 3. Display the data in the view. CREATE VIEW PartOrder AS SELECT Part.PartNum, Part.Description, Part.Price, OrderLine.OrderNum, OrderLine.NumOrdered, OrderLine.QuotedPrice, Orders.OrderDate FROM Orders INNER JOIN (Part

By filling the database with test data, we can begin to determine if the tables are normalized correctly, need changes to the keys and foreign keys, or new bridge tables are needed to correctly output the data. It is also at this point that we test to ensure that data types match and all entities are of the proper format. Although Change Request No. 3 seems fairly simple, it will bring

table Import the structure of a table in an Access database Add fields using the Data Type gallery Delete a field Reorder fields Enter a record in Table Datasheet view Import data from a text file Create a table in Design view Set the primary key Import

Primary keys: The main feature of a relation database would be the primary key. It is a unique identifier set to each and every record that travels across different tables in relationships. An example of a primary key is a Social Security number. The primary keys job is to make each record unique and it lets data to be kept in more than one table. Each table within a relational database will have a field for the primary key. Foreign keys: A foreign

17) A surrogate key is a random or arbitrary key often just numbers incremented. 18) A composite key refers to an entity that has multiple keys. 19) Domain entities are entities that represent the core business elements of the database. 20) A lookup entity can help ensure consistency in data entries. Unit 3 Assignment