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Create a table according to given data:
Course(Course_Number#, CourseName, Pre_Req_Course_Number)
1. Manufacturer(Manufacturer_Number#, Name)
2. Bed(Bed_Number#, BrandName, Size, Length, Width)
3. Category(Category_Number#, Name)
4. Mattress (Mattress_Number#, BrandName)
5. MattressAndBed(Mattress_Number#,Bed_Number#, Comfort_Rating ): Mattress and Bed has many to many relationships, so this extra entity will be created.
Create centralized relational database using Top down method- Construction of Logical Model: Translation EERD into Relational Schema: Use the 8 steps algorithm of converting EERD
Draw an EER diagram that captures the "is-a" hierarchy of students in another simple database. The database captures both the "basic" information (say, student ID and student name)
Define NULL value NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which
State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
Define instance and schema? Instance: Collection of data kept in the data base at a particular moment is known as an Instance of the database. Schema: The o
What are the advantages and disadvantages of merging an association into a class? Advantages: i) Less number of tables ii) Faster performance due to the fewer tables
What are the uses of the information in the Data dictionary? The following information is directly taken from the Data dictionary: Information on fields displayed with
We define a view in SQL through using the create view command. To describe a view, we must provide the view a name and must state the query in which computers the view. The form of
Describe domain constraints. Domain constraints contain entity integrity and referential integrity. The domain is a set of values that might be assigned to an attribute. The en
what is cascading rollback
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