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Server Control
It is usual to control access to the data via the front end application, for example by displaying data as ‘read only'. This part of the assignment illustrates how programmers can create reusable (and therefore shareable) code, you will be creating simple components to reuse and call from elsewhere in your code.
For the case study:
a) Identify and create a user defined function.
b) Identify a useful persistent package variable for the system.
c) Identify suitable package for the system that implements constraints. Create the package program.
d) Implement a DML type program unit (e.g. a procedure that updates data in a table) that calls the package you created in task c).
e) Implement a trigger that calls the program unit you created in task d).
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
1) Information about a bank is about customers and their account. Customer has a name, address which consists of house number, area and city, and one or more phone numbers. Ac
Illustrate how you can use QBE to perform logical AND and OR operation
Which database object does not physically exist? A view database object does not physically exist.
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
using the invoice table shown below,write the relational schema,draw a dependencies,inclunding all partial and transitive dependencies.assume that the table does not contain repeat
Express the following queries in SQL: (a) Write the SQL code that will create ALL the four tables given in the appendix. Your answer should not contain the primary key and
Every School has many teachers and many students. Each student is assigned to one school and each teacher works for one school only. Each teacher teaches more than one subject but
What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
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