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1. What are the differences between the characteristics of an operational database and a dimensional database?
2. What is XML, and why is it useful?
3. What is an XML Schema document?
4. How can XML be used with a DBMS?
As DBA, your manager called a meeting and asked why there are so many orders for customers that don't exist in the customer table. Write query which would shows which customers were missing for existing orders. Use a join or a subquery.
/*Using the STUDENT table in the MISLab1 database in Omnymbus, perform the following tasks: Note the first SELECT is there to label the output, DUAL is a "dummy" table. The second SELECT is the solution.
1) Add 10 customers to the database using the Customers table. Show the table, including the SQL Code.2) Using SQL query, update more than one element in a customer record. Show before and after data, including the SQL code.
Write your queries so that the final answers will never include duplicates, but add the keyword DISTINCT only in cases where duplicates would otherwise be produced.
Describe the vulnerability that the attack exploits, including how or why the vulnerability exists; what versions of software are vulnerable.
How to select the primary key from the candidate keys? How do foreign keys relate to candidate keys? provide examples from either your workplace or class assignments
Write a command that will remove the Jones that lives in Orange from the Customer table .Write the SQL DDL to create the database that contains each of the relations shown in the above ERD.
Using the Oracle Developer Data Modeler tool, draw an Entity Relationship Model for the Galle Face Elephants case study above. Explain any assumptions you have made.
Write PL/SQL procedures and functions to populate and query that database
Write a query to display the starting salary for each employee. The starting salary would be the entry in the salary history with the oldest salary start date for each employee. Sort the output by employee number.
Explain the function of each of the clauses in the SELECT statement. What restrictions are imposed on these clauses. What are the two major components of SQL and what function do they serve
Discuss some possible solutions and strategies for improving the performance of SQL queries and their ability to provide data to users and identify the performance or usability issues that need to be addressed.
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