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
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NOT NULL - Indicates that a column cannot store NULL value UNIQUE - Ensures that each rows for a column must have a unique value PRIMARY KEY - A combination of a NOT NULL and UNIQUE. Ensures that a column (or combination of two or more columns) have an unique identity which helps to find a particular record in a table more easily and quickly FOREIGN KEY - Ensure the referential integrity of the data in one table to match values in another table CHECK - Ensures that the value in a column meets
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INTRODUCTION Background of the Study Tourism is one business sector of our country that really helps in providing jobs and incomes to our country as a whole. Tourism consists of service industries including transportation services‚ such as airlines‚ cruise ships‚ and taxicabs; hospitality services‚ such as accommodations‚ Including hotels and resorts; and entertainment venues‚ such as amusement parks‚ casinos‚ shopping malls‚ music venues and theatres. A hotel which is the focus of our
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possible between entities? a. one b. two c. three d. an infinite number e. an odd number 1 points Question 4 The primary key for many-to-many tables consists of a. a single attribute unique for that relationship. b. two primary keys from each entity linked in the relationship. c. a series of foreign keys. d. a linked primary key and a foreign key from both entities. e. a and b only 1 points Question 5 Using the REA data model‚ promises to engage in future economic exchanges
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DATABASE FOR SCHEDULING Joshua Crisp Prof. Raman Marwah CIS210 11/25/2012 There are many advantages of creating a database for scheduling purposes. Having a database will allow trainers to see what courses they have coming up and their supervisors will also see what their workload is. Being part of a corporation that is expanding needs to be able to adapt to changes and having a database for scheduling will help. First we will have to look at what is needed to create a scheduling database
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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 data from an Excel worksheet Create a one-to-many relationship Project overview Yuka Koyama uses the Pinehill database to maintain information about the students‚ teachers‚ and contracts for her music school. Yuka asks you to help her build
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types that would be appropriate for the data that will need to be stored in each attribute. Enforce primary key and foreign key constraints as indicated by the ERD. CREATE TABLE PRICE ( PRICE_CODE INTEGER NOT NULL UNIQUE‚ PRICE_DESCRIPTION CHAR(15) NOT NULL‚ PRICE_RENTFEE VARCHAR(3) NOT NULL‚ PRICE_DAILYLATEFEE VARCHAR(3) NOT NULL‚ PRIMARY KEY (PRICE_CODE)); CREATE TABLE MOVIE ( MOVIE_NUM INTEGER NOT NULL UNIQUE‚ MOVIE_TITLE VARCHAR(35)
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1.0 Overview of the case study Background of the Study Sweeney Tours is a holiday tour operator offering package holidays to a number of resorts in the Mediterranean. The holidays fly from a number of airports in the UK and have a fairly complicated pricing Structure. There is a great deal of information in the brochures that Sweeney Tours produce along with an Accompanying price guide. Some of the information is on computer but this is somewhat cumbersome as it is in separate systems that are
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Potential constraints on my logical data model Budget The budget can really alter the way the database ends up like‚ if the budget is really low then the database will not turn as good as if more money were spent on it. This can really change the database greatly and a knowledgeable amount of money needs to be put into any database for it to return satisfaction. Timescale If the client sets a time that the database needs to be finished by then the database may or may not need to be created fast
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primary key specified? A primary key is specified by the selecting the column‚ right-clicking‚ then selecting Set Primary Key. 8. How is a relationship created in SQL server? In the table design view‚ right click the column name of the entity you want to create a relationship with and then select "Relationships" which opens the Properties window with the Relationships tab selected. Click on "New" and then verify the "Primary key table" and "Foreign key table". Select the primary key from the
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