create barcode using vb.net COURSE -----ERM PRO XML RSD OAU SQL XML JAV SQL PLS OAU SQL JAV in Java

Drawer Data Matrix in Java COURSE -----ERM PRO XML RSD OAU SQL XML JAV SQL PLS OAU SQL JAV

COURSE -----ERM PRO XML RSD OAU SQL XML JAV SQL PLS OAU SQL JAV
Data Matrix 2d Barcode Maker In Java
Using Barcode encoder for Android Control to generate, create DataMatrix image in Android applications.
www.OnBarcode.com
UCC.EAN - 128 Generation In Java
Using Barcode generator for Android Control to generate, create USS-128 image in Android applications.
www.OnBarcode.com
13 rows selected. SQL> 9. Who attended (at least) the same courses as employee 7788 Solution 9-9. SQL> 2 3 4 5 6 7 8 select from where and e.ename, e.init employees e e.empno <> 7788 not exists (select r1.course from registrations r1 where r1.attendee = 7788 MINUS
Generate QR Code JIS X 0510 In Java
Using Barcode encoder for Android Control to generate, create Denso QR Bar Code image in Android applications.
www.OnBarcode.com
Barcode Creation In Java
Using Barcode generation for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
APPENDIX B
Barcode Drawer In Java
Using Barcode maker for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Code 39 Creation In Java
Using Barcode encoder for Android Control to generate, create Code-39 image in Android applications.
www.OnBarcode.com
ANSWERS TO THE EXERCISES
Drawing EAN-13 Supplement 5 In Java
Using Barcode drawer for Android Control to generate, create EAN13 image in Android applications.
www.OnBarcode.com
Printing Delivery Point Barcode (DPBC) In Java
Using Barcode generation for Android Control to generate, create Postnet image in Android applications.
www.OnBarcode.com
9 10 11 ENAME -------ALLEN BLAKE KING ADAMS SQL>
Data Matrix Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Make Data Matrix In .NET Framework
Using Barcode drawer for Reporting Service Control to generate, create Data Matrix ECC200 image in Reporting Service applications.
www.OnBarcode.com
select r2.course from registrations r2 where r2.attendee = e.empno); INIT ----JAM R CC AA
Recognizing Code 3/9 In Visual C#.NET
Using Barcode decoder for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Code 39 Extended Drawer In Objective-C
Using Barcode printer for iPhone Control to generate, create ANSI/AIM Code 39 image in iPhone applications.
www.OnBarcode.com
This is not an easy exercise. The elegant solution shown here uses the MINUS set operator and a correlated subquery. Note the correct position of the negation on the fourth line. You can read the solution as follows: List all employees (except employee 7788 himself/herself) for which you cannot find a course attended by employee 7788 and not attended by those employees. The first subquery (see lines 5 through 7) is not correlated, and it results in all courses attended by employee 7788. The second subquery (see lines 9 through 11) is correlated, and it produces all courses attended by employee e.
Print Matrix Barcode In Java
Using Barcode encoder for Java Control to generate, create 2D image in Java applications.
www.OnBarcode.com
Barcode Maker In .NET Framework
Using Barcode maker for VS .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
Note This exercise is similar to exercise 4 in this chapter. Both exercises belong to the same category of subset problems. This means that the solutions of 9 s exercises 4 and 9 are interchangeable (not verbatim, of course, because the exercises are different; however, they can be solved with the same approach).
Linear Barcode Creation In Visual Studio .NET
Using Barcode creator for ASP.NET Control to generate, create Linear image in ASP.NET applications.
www.OnBarcode.com
Matrix 2D Barcode Generator In .NET
Using Barcode creation for ASP.NET Control to generate, create Matrix image in ASP.NET applications.
www.OnBarcode.com
10. Give the name and initials of all employees at the bottom of the management hierarchy, with a third column showing the number of management levels above them. Solution 9-10. SQL> 2 3 4 5 6 select , from where start with connect by ename, init (level - 1) as levels_above employees connect_by_isleaf = 1 mgr is null prior empno = mgr;
Generate DataMatrix In Objective-C
Using Barcode maker for iPhone Control to generate, create Data Matrix 2d barcode image in iPhone applications.
www.OnBarcode.com
QR Code Printer In Java
Using Barcode generator for Java Control to generate, create Denso QR Bar Code image in Java applications.
www.OnBarcode.com
ENAME -------ADAMS SMITH ALLEN WARD MARTIN TURNER
Making 1D Barcode In VB.NET
Using Barcode creator for .NET Control to generate, create Linear image in Visual Studio .NET applications.
www.OnBarcode.com
Encoding Code-128 In None
Using Barcode drawer for Font Control to generate, create USS Code 128 image in Font applications.
www.OnBarcode.com
INIT LEVELS_ABOVE ----- -----------AA 3 N 3 JAM 2 TF 2 P 2 JJ 2
APPENDIX B
ANSWERS TO THE EXERCISES
JONES MILLER
R TJA
8 rows selected. SQL>
10 Exercises
1. Look at the example discussed in Listings 10-7, 10-8, and 10-9. Rewrite the query in Listing 10-9 without using a view, by using the WITH operator. Solution 10-1. Listing 10-9 Rewritten to Use the WITH Operator SQL> 2 3 4 5 6 7 8 9 10 11 12 13 with course_days as (select e.empno, e.ename , sum(c.duration) as days from registrations r , courses c , employees e where e.empno = r.attendee and c.code = r.course group by e.empno, e.ename) select * from course_days where days > (select avg(days) from course_days); ENAME DAYS -------- -------ALLEN 11 BLAKE 12 SCOTT 12 KING 8 ADAMS 9 FORD 9
EMPNO -------7499 7698 7788 7839 7876 7902 SQL>
2. Look at Listing 10-12. How is it possible that you can delete employee 7654 via this EMP view There are rows in the HISTORY table, referring to that employee via a foreign key constraint. Answer: You can delete that employee because you created the foreign key constraint with the CASCADE DELETE option, so all corresponding HISTORY rows are deleted implicitly. 3. Look at the view definition in Listing 10-18. Does this view implement the foreign key constraints from the REGISTRATIONS table to the EMPLOYEES and COURSES tables Explain your answer. Answer: No, it doesn t. The view checks insertions and updates, but it doesn t prevent you from deleting any rows from the EMPLOYEES and COURSES tables; that is, the view implements only one side of those foreign key constraints.
APPENDIX B
ANSWERS TO THE EXERCISES
Tip Don t try to program your own referential integrity constraint checking. Your solution will probably overlook something, and it will always be less efficient than the declarative constraints of the Oracle DBMS.
4. Create a SAL_HISTORY view providing the following overview for all employees, based on the HISTORY table: For each employee, show the hire date, the review dates, and the salary changes as a consequence of those reviews. Solution 10-4. The SAL_HISTORY View SQL> 2 3 4 5 6 7 8 9 10 11 create or replace view sal_history as select empno , min(begindate) over (partition by empno) as hiredate , begindate as reviewdate , msal - lag(msal) over (partition by empno order by empno, begindate) as salary_raise from history;
View created. SQL> break on empno on hiredate SQL> select * from sal_history; EMPNO HIREDATE REVIEWDATE SALARY_RAISE ----- ----------- ----------- -----------7369 01-JAN-2000 01-JAN-2000 01-FEB-2000 -150 7499 01-JUN-1988 01-JUN-1988 01-JUL-1989 300 01-DEC-1993 200 01-OCT-1995 200 01-NOV-1999 -100 7521 01-OCT-1986 01-OCT-1986 ... 7934 01-FEB-1998 01-FEB-1998 01-MAY-1998 5 01-FEB-1999 10 01-JAN-2000 10 79 rows selected. SQL>
Copyright © OnBarcode.com . All rights reserved.