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a) Distinguish between ‘database' and ‘Database Management Systems (DBMS)'.
b) List and briefly describe five potential benefits of the database approach compared to conventional file systems.
c) In MS Access what is a ‘Form? What are the two reasons for using a ‘Form'? State three purposes where you can use a ‘Form'.
d) Describe briefly the three parts of the Relational Model.
A student entity type has the following attributes,name..
What is a foreign key, and what is it used for? A foreign key is used to establish relationships between relations in the relational model. Technically, a foreign key is a colu
Which sorting technique is used to sort databases, whose sizes are very big? Give one such algorithm. Why do sorting techniques like quicksort, insertion sort, etc. not applied
lock and types of lock
Draw an Entity-Relationship model for the relational schema given in the Appendix. Show all the entities, relationships, relationship names, and attributes and also underline the
composite attribute
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
Benefits of using heuristics
The following data are required to be stored by a family physician. Family#, FamilyAddress, Patient#, PatientName, ServiceCode, ServiceFee, ServiceDate A family can have seve
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
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