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Cyber Transit Ltd keeps up-to-date information on the processing and current position of each dispatched item. Dispatched items are the main concern of the Cyber Transit product tracking information system. Dispatched items can be characterized by item number (unique), weight, size, destination, and final date of delivery. Dispatched items are received into the Cyber Transit system at a single retail center. Retail centers are characterized by their type, unique ID and address. Dispatched items make their way to their destination via one or more Cyber Transit transportation medium (i.e. flights, truck deliveries). These transportation medium are characterized by a unique schedule number, a type (e.g. flight, truck) and a delivery route.
Create an Entity Relationship diagram that captures this information about Cyber Transit Ltd.
Convert the ER diagram in figure above into its corresponding relational schema diagram.
An employee record has the following structure struct employee { int eno; char name[22]; float salary; char dept[10];}; (i) Calculate the record size R in bytes.
job scheduling for different cubes
Unrepeatable reads : Assume T7 reads X twice during its implementation. If it did not update X itself it could be very disturbing to see a dissimilar value of X in its next read. B
You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup
Distributed query and transaction processing a. Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4
There are a number of possible solutions to the open ended brief. One of the simple ones is shown here without the PKs and FKs. It is important to think of how a number of tasks
With the help of an example display how records can be deleted and updated in QBE. (i) Increase Pay_Rate of employees along with the skill of ‘cook' by 10%. (ii) Delete employee
Explain the difference between optimistic locking and pessimistic locking. Optimistic locking supposes no transaction conflict will occur and deals with the consequences if it
Differance between DDL and SDL? DDL and SDL - The data definition language (DDL) is used through DBA and database designers to describe internal schema, conceptual schema, and
ADVANCE OBJECT DESIGN Introduction Analysis is the initial step of the OMT methodology. It is apprehensive with devising a precise, concise, correct and understandable mo
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