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Why, generally does an object-oriented system use the relational DBMS?
The reasons for using relational DBMS for OO systems could be any combination of following:
a. Many organizations have existing relational databases including existing business data.
b. Most commercial RDBMS come with "Object-Relational" extension which implements object database on top of a RDBMS.
c. Purely object databases are too complex to use, and lack standards like SQL.
The clause in SQL which specifies that the query result should be sorted in ascending or descending order based upon the values of one or much more columns is Ans : Order by
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In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
Natural Join : It is the similar like Equi join except one of the duplicate columns is removed in the result table. The natural join is the most usually used form of join operation
Step 1 . Using Oracle, create the tables identified in the preferred solution for Assignment 2. Technicians (ZipCode, TechnicianID, FirstName, LastName, Street, City, State, Home
1. Identify the comparisons and exchanges made to sort the following array using the selection exchange sort technique. Note: you may not need all columns. Ori
Dirty Reads: T10 reads a value which is updated by T9. This update has not been committed and T9 aborts. T9 T10 Value of x old value = 200
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Problem: (a) Given the following relation: Stats(Name,Sex,Children, Occupation, Salary, Tax, Audits) Write SQL code to define the following security constraints: (i) User
what are the topics in data management
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