Each of these methods for storing a relational database has two benefits. Each connection should have its own file.
Q: Each of these methods for storing a relational database has two benefits. Keep a separate file for…
A: Introduction: A relational database is used to store and access data items that are related to one…
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Q: Each of these approaches of storing a relational database has two advantages. Maintain a separate…
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A: GIVEN:
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A: Transparency in a distributed database management system should have the following features:…
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A: Answer:
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Q: Discuss the many data request scenarios that may arise in a distributed database system
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Q: In a database system, the allocation of records to blocks has a significant impact on its…
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Q: database logs
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Q: Examine the many data request situations that may occur in a distributed database system.
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- Each of these methods for storing a relational database has two benefits. Keep a separate file for each connection you have.It is important to test a distributed database using all possible data request situations.In a database system, the allocation of records to blocks has a significant impact on its performance.
- All data request scenarios should be tested in a distributed database.A clothing manufacturer produces woollen jumpers in a variety of sizes and colours. These are stored in a warehouse and each location in the warehouse contains jumpers that are all the same colour and all the same size. Each of the different sizes is available in all the different colours, and each combination of size and colour can be found in only one location in the warehouse. The manufacturer uses a relational database to record information about what is stored in each location in the warehouse. There is a table, Warehouse, with three attributes: Size, Colour, Location. Below are listed four possible functional dependencies for the table. Not all of these hold. For each dependency, state whether it holds or not. Justify the reason for your decision in each case by referring to the description at the start of the question. Location → Size, Colour Location, Size → Colour Colour, Size → Location Colour → Size, LocationA clothing manufacturer produces woollen jumpers in a variety of sizes and colours. These are stored in a warehouse and each location in the warehouse contains jumpers that are all the same colour and all the same size. Each of the different sizes is available in all the different colours, and each combination of size and colour can be found in only one location in the warehouse. The manufacturer uses a relational database to record information about what is stored in each location in the warehouse. There is a table, Warehouse, with three attributes: Size, Colour, Location. a)What are the candidate keys for the table? State why they are candidate keys. b)What normal form is the Warehouse table in? Justify your answer by referring to specific dependencies for the table. (c) It is suggested that the Warehouse table be split into two tables. One table is to have attributes Size, Colour and the other to have attributes Location, Size. Explain briefly any advantages or disadvantages of…
- The allocation of entries to blocks has a significant impact on the performance of a database system.There are several potential data-access patterns in a distributed database system.in pharmacies in Turkey, it was decided to use a shared database. You have been assigned to design a database. You are given the following information:Patients are identified by their personal number and you need a record of their first name, last name, address and age. Each patient is assigned a primary doctor (family doctor).Doctors check the patients. They are identified by their registry numbers. You also need their first name, surname, specialty and years of experience. Every doctor has at least one patient. Doctors prescribe medication for patients. A doctor may prescribe one or more medications for several patients, and a patient may receive prescriptions from several doctors. Each prescription has a date and an amount associated with it. If a doctor prescribes a medicine more than once for a patient, all prescriptions must be kept.Each pharmaceutical company is identified by name and has a telephone number. Trade name and formula should be recorded for each drug. Each drug is…
- in pharmacies in Turkey, it was decided to use a shared database. You have been assigned to design a database. You are given the following information:Patients are identified by their personal number and you need a record of their first name, last name, address and age. Each patient is assigned a primary doctor (family doctor).Doctors check the patients. They are identified by their registry numbers. You also need their first name, surname, specialty and years of experience. Every doctor has at least one patient. Doctors prescribe medication for patients. A doctor may prescribe one or more medications for several patients, and a patient may receive prescriptions from several doctors. Each prescription has a date and an amount associated with it. If a doctor prescribes a medicine more than once for a patient, all prescriptions must be kept.Each pharmaceutical company is identified by name and has a telephone number. Trade name and formula should be recorded for each drug. Each drug is…in pharmacies in Turkey, it was decided to use a shared database. You have been assigned to design a database. You are given the following information:Patients are identified by their personal number and you need a record of their first name, last name, address and age. Each patient is assigned a primary doctor (family doctor).Doctors check the patients. They are identified by their registry numbers. You also need their first name, surname, specialty and years of experience. Every doctor has at least one patient. Doctors prescribe medication for patients. A doctor may prescribe one or more medications for several patients, and a patient may receive prescriptions from several doctors. Each prescription has a date and an amount associated with it. If a doctor prescribes a medicine more than once for a patient, all prescriptions must be kept.Each pharmaceutical company is identified by name and has a telephone number. Trade name and formula should be recorded for each drug. Each drug is…in pharmacies in Turkey, it was decided to use a shared database. You have been assigned to design a database. You are given the following information:Patients are identified by their personal number and you need a record of their first name, last name, address and age. Each patient is assigned a primary doctor (family doctor).Doctors check the patients. They are identified by their registry numbers. You also need their first name, surname, specialty and years of experience. Every doctor has at least one patient. Doctors prescribe medication for patients. A doctor may prescribe one or more medications for several patients, and a patient may receive prescriptions from several doctors. Each prescription has a date and an amount associated with it. If a doctor prescribes a medicine more than once for a patient, all prescriptions must be kept.Each pharmaceutical company is identified by name and has a telephone number. Trade name and formula should be recorded for each drug. Each drug is…