COB 204 Databases Test with Complete Solutions
What is a database management system (DBMS)? - Answer-Software program to create, process, administer a database
Licensed from vendors
- IBM, Microsoft, Oracle, & others
DB2, Access, SQL Server, Oracle Database
Open Source
MySQL: License-free f...
COB 204 Databases Test with
Complete Solutions
What is a database management system (DBMS)? - Answer-Software program to
create, process, administer a database
Licensed from vendors
- IBM, Microsoft, Oracle, & others
DB2, Access, SQL Server, Oracle Database
Open Source
MySQL: License-free for most applications
what does Database administration do? - Answer-- Set up security system, user
accounts, passwords, permissions, limits for processing
- Limit user permissions
- Backup database, improve performance of database application, remove unwanted
data
This statement will return a row for every row in the Customer table, and also
associated information from the CustomerDetail table is there is any
A.) SELECT * FROM CustomerDetail RIGHT JOIN CustomerDetail ON Customer.Id =
CustomerDetail.CustomerId;
B.) SELECT * FROM Customer LEFT JOIN CustomerDetail ON Customer.Id =
CustomerDetail.CustomerId;
C.) SELECT * FROM Customer WHERE CustomerDetail.CustomerId = Customer.Id;
D.) SELECT * FROM Customer; - Answer-B.) SELECT * FROM Customer LEFT JOIN
CustomerDetail ON Customer.Id = CustomerDetail.CustomerId;
Which SQL clause will you add to this query in order to associate the "Phone" field with
the "Number1" field in the "Contacts" table?
SELECT * FROM Customers
A.) JOIN Contacts
ON Phone=Number1
B.) JOIN ON Customers.Phone = Contacts.Number1
C.) JOIN Contacts
ON Customers.Phone = Contacts.Number1
D.) CONNECT Customers.Phone = Contacts.Number1 - Answer-C.) JOIN Contacts
ON Customers.Phone = Contacts.Number1
Which type of join returns only the matches for items that are in both tables?
, A. outer join
B. right join
C. left join
D. inner join - Answer-D. inner join
Is it possible to group by two fields, and if so what would be the correct syntax?
A. Yes, using this syntax:
GROUP BY Field1
GROUP BY Field2
B. No, applying multiple grouping in the same statement is not allowed
C. Yes, using this syntax:
GROUP BY Field1, Field2
D. Yes, multiple grouping is allowed, but only if the grouped fields have the same data
type - Answer-C. Yes, using this syntax:
GROUP BY Field1, Field2
Which statement is true regarding the DB Browser tool?
A. The tool must connect to a database server
B. This tool must be purchased
C. This tool works consistently across all major platforms
D. This tool does not offer a log of historical commands - Answer-C. This tool works
consistently across all major platforms
What does a record represent in a database?
A. a kind of information
B. a set of information
C. a type of field
D. a table of values - Answer-B. a set of information
How many clauses are defined in this statement?
*SELECT Height, Weight FROM Shapes
WHERE Material='Wood'
ORDER BY Height;*
A. one
B. four
C. three
D. five - Answer-B. four
Bryan is 13 years old, Lisa is 15, and Mike is 21. Their ages would most likely be stored
in a:
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