Examples of the UNION operator, the use the DISTINCT operator. TOPIC : DATABASE
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Examples of the UNION operator, the use the DISTINCT operator.
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- Database course: (Please tell me the answer then I will put it in each box)Instruction: Identify if the following is UNIQUE IDENTIFIER or NOT. Joining Date End of Membership Date Membership IDHoliday Travel Vehicles sells new recreational vehicles and travel trailers. When new vehicles arrive at Holiday Travel Vehicles, a new vehicle record is created. Included in the new vehicle record are a vehicle serial number, name, model, year, manufacturer, and base cost. When a customer arrives at Holiday Travel Vehicles, he or she works with a salesperson to negotiate a vehicle purchase. When a purchase has been agreed upon, a sales invoice is completed by the salesperson. The invoice summarizes the purchase, including full customer information, information on the trade-in vehicle (if any), the trade-in allowance, and information on the purchased vehicle. If the customer requests dealer-installed options, they are listed on the invoice as well. Th e invoice also summarizes the final negotiated price, plus any applicable taxes and license fees. The transaction concludes with a customer signature on the sales invoice. Identify the classes described in the preceding scenario (you…
- Employee Management system: This system allows the employees to apply for leaves, upload certificates etc. online. The HR Manager can also use the system for administrative purpose. Create your own case study (problem statement) for the above application and Draw a DFD-0 for this applicationThe Music Database The music database stores details of a personal music library, and could be used to manage your MP3, CD, or vinyl collection. Because this database is for a personal collection, it’s relatively simple and stores only the relationships between artists, albums, and tracks. The following is a list of requirements: i) The collection consists of albums; ii) An album is made by exactly one artist. There must be an artist and album; iii) An artist makes one or more albums (identifying relations); iv) An album contains one or more tracks; v) Artists, albums, and tracks each have a name; vi) Each track is on exactly one album. Vii) Each track has a time length, measured in seconds. The track may or may not be played and can be played as many times as required (non-identifying relations). When a track is played, the date and time the playback began (to the nearest second) should be recorded; this is used for reporting when a track was last played, as well as the number of…The Music Database The music database stores details of a personal music library, and could be used to manage your MP3, CD, or vinyl collection. Because this database is for a personal collection, it’s relatively simple and stores only the relationships between artists, albums, and tracks. The following is a list of requirements: i) The collection consists of albums; ii) An album is made by exactly one artist. There must be an artist and album; iii) An artist makes one or more albums (identifying relations); iv) An album contains one or more tracks; v) Artists, albums, and tracks each have a name; vi) Each track is on exactly one album. Vii) Each track has a time length, measured in seconds. The track may or may not be played and can be played as many times as required (non-identifying relations). When a track is played, the date and time the playback began (to the nearest second) should be recorded; this is used for reporting when a track was last played, as well as the number of…
- The Music Database The music database stores details of a personal music library, and could be used to manage your MP3, CD, or vinyl collection. Because this database is for a personal collection, it’s relatively simple and stores only the relationships between artists, albums, and tracks. The following is a list of requirements: i) The collection consists of albums; ii) An album is made by exactly one artist. There must be an artist and album; iii) An artist makes one or more albums (identifying relations); iv) An album contains one or more tracks; v) Artists, albums, and tracks each have a name; vi) Each track is on exactly one album. Vii) Each track has a time length, measured in seconds. The track may or may not be played and can be played as many times as required (non-identifying relations). When a track is played, the date and time the playback began (to the nearest second) should be recorded; this is used for reporting when a track was last played, as well as the number of…In Senior Project Website, the user requests the website to search for previous senior projects, the website displays the search web form, the user inputs the keywords to be used for the search process, the user submits the search criteria to the website, and the website requests a remote database to search for senior projects that fulfill the requested criteria (keywords). The remote database returns back a Boolean value (indicating if the search is successful or not) and a list of found senior projects (the list is empty if not successful), If the search is successful, the website displays the list of received senior projects, else, the website displays error dialog box indicating that no projects were found. Q2. For Senior Project Website System described above, students are required to conduct the following task: a) Design the Sequence Diagram of Senior Project Website System described above.Please explain both correct and incorrect answer with explanation otherwise will dislike
- The scheme that controls the interaction between executing transactions is called as _____There is a wide variety of constraints.Systems Analysis and Design Use any suitable tool, represent, using the proper symbols, the following action: A young inventors club has decided to implement a website to motivate its members. The website has the following data. Members are requested to fill the application forms. Member details are stored in member file. Accounts department gets the details from member file and decides the membership fees. And it sends the receipt to the member.