1. CS 3630 Database Design and Implementation

2. SQL-Plus Prompt
Prompt Prompt Assignment 8 Prompt Name: Qi Yang Prompt 1. Prompt List all rooms sorted by price in descending order. Select * From Room Order by Price desc; pause

3. Oracle Date Formats Default Date Format SQL> set pagesize 20
dd-Mon-yy
-- 30-Mar-15
Select *
From Booking;
SQL> set pagesize 20
-- initial size: 11

4. Oracle Date Formats Other Date Format Day ddd: day of the year
d : day of the week: Sun (1), Mon (2), ...
dy : mon, tue, (all lower case)
Dy : Mon, Tue (Init cap)
DY : MON, TUE (all caps)

5. Oracle Date Formats Other Date Format Month
Month: name of month (char(9))
Mon : Three chars
mm :
Year
Year: Year spelled out: Two Thousand Fifteen
yyyy: 4 digits
yyy: 3 digits
yy: 2 digits
y: 1 digit

6. Oracle Date Formats Other Date Format Hour HH (HH12): 01 - 12
HH AM : with AM/PM
Minute
MI :
Second
SS :
Time is included in date
Default values: 00:00:00 (HH24)

7. Oracle Function To_Date
Insert into booking
Values ('H01', 'G01003',
To_date(' ', 'mm-dd-yyyy'),
'9-Apr-16', 'R001');
-- Not needed if in standard format

8. Oracle Function To_Char
-- Will display Apr
Select guest_no, To_Char(Date_from, 'Mon-dd-yyyy')
From booking;
-- Will display
select to_char(date_from, 'mm/dd/yyyy'),
to_char(date_to, 'mm/dd/yyyy')
from booking;
-- Will display Apr
Select guest_no, To_Char(Date_from, 'Mon dd yyyy')

9. Formatting
col "Guest No" format a9 col "Date From" format a15 set pagesize 20 Select guest_no "Guest No", To_Char(Date_from, 'Mon-dd-yyyy') "Date From" From booking; pause select to_char(date_from, 'mm-dd-yyyy') "Date From", to_char(date_to, 'mm-dd-yyyy') "Date To" from booking; Select guest_no "Guest No", To_Char(Date_from, 'Mon dd yyyy') "Date From"

10. Comparing Dates Select guest_no "Guest No",
To_Char(Date_from, 'Mon-dd-yyyy') "Date From"
From booking
Where Date_From >= To_Date('05-May-2005');
pause
Where Date_From >= '05-May-2005';
Where Date_From between To_Date('12-Apr-2005')
and To_Date('30-Apr-2005');
Do we need to_date for standard format?

11. Table Dual SQL> Desc Dual Name Null? Type
DUMMY VARCHAR2(1)
SQL> Select * from dual;
DUMMY X

12. Function SysDate How to display date/time in SQLPlus? Select SysDate
From Dual;
Select to_char(SysDate, 'Mon-dd-yyyy hh:mi:ss')

13. Select Clause Select SysDate From Booking;
Select 'The system date function', SysDate
From Booking
Where Hotel_No = 'H01';

14. Date Functions -- next day Select sysdate + 1 from dual;
-- previous month
select add_months(sysdate, -1)
-- last_day: last day of the month
select last_day(sysdate)
-- next_day: the next Wednesday
select next_day(sysDate, 'Wednesday')
From dual;
-- Months_Between
select months_between(sysdate, add_months(sysdate, 3))

15. Date Functions -- last month of the year
select add_months(sysdate, 12 - to_char(sysdate, 'mm'))
from dual;
-- to_number
select add_months(sysdate, 12 - to_Number(to_char(sysdate, 'mm')))
-- last day of the year
select last_day( add_months(sysdate, 12 - to_char(sysdate, 'mm')) )
From dual;
-- first month of the year
Select add_months(sysdate, 1 - to_char(sysdate, 'mm'))
-- first day of the year
-- need to be on the same line
Select add_months(sysdate, 1 - to_char(sysdate, 'mm')) -
to_char(add_months(sysdate, 1 - to_char(sysdate, 'mm')), 'dd') + 1

16. Date and String The latest (largest) Date_To Select Max(Date_To)
From Booking;
Select To_Char(Max(Date_To), 'dd Mon yyyy')
-- Incorrect!
Select Max(To_char(Date_To, 'dd Mon yyyy'))

17. Comparing Dates Bookings for April 2005 Select hotel_no, guest_no,
to_char(date_from, 'dd-mon-yyyy'),
to_char(date_to, 'dd-mon-yyyy'), room_no
From Booking
Where Date_from between '1-Apr-05' and '30-Apr-05'
Or Date_to between '1-Apr-05' and '30-Apr-05';
-- Correct?

18. Comparing Dates Bookings during April 2005 Select * From Booking
Where Date_from between '1-Apr-05' and '30-Apr-05'
Or Date_to between '1-Apr-05' and '30-Apr-05'
Or Date_from < '1-Apr-05' and
Date_To > '30-Apr-05';
-- bookings started before apr 2005 and
ended after apr 2005

19. Comparing Dates Bookings during April 2005 (better solution!) Select *
From Booking
Where not Date_from > '30-Apr-05'
and not Date_to < '1-Apr-05';

20. Comparing Dates Bookings for April 2005 Select * From Booking
Where Date_from <= '30-Apr-05'
and Date_to >= '1-Apr-05'
-- Same as
-- Where not Date_from > '30-Apr-05'
-- and not Date_to < '1-Apr-05';

21. Comparing Dates Bookings for April 2005 Select * From Booking
Where not (Date_from > '30-Apr-05' Or
Date_to < '1-Apr-05')
-- DeMorgan’s Law
Where not Date_from > '30-Apr-05'
and not Date_to < '1-Apr-05';

22. Comparing Dates Bookings this year Select * From Booking
Where To_char(Date_from, 'yyyy') = To_Char(SysDate, 'yyyy')
Or To_Char(Date_to, 'yyyy') = To_Char(SysDate, 'yyyy');
-- Assuming no bookings are more than one year
-- Assuming bookings could be longer than one year
Or To_Char(Date_to, 'yyyy') = To_Char(SysDate, 'yyyy')
or to_number(To_char(Date_from, 'yyyy')) < to_number(To_Char(SysDate, 'yyyy'))
and to_number(To_Char(Date_to, 'yyyy')) > to_number(To_Char(SysDate, 'yyyy'))

23. Bookings of the current month (of the current year)
-- Bookings could be longer than one month
Select *
From Booking
Where Date_From <= Last_Day(SysDate)
and Date_To >= (SysDate - To_Number(To_Char(SysDate, 'dd')) + 1);
No First_Day

24. Bookings of the current month (of the current year)
-- Bookings could be longer than one month
Select *
From Booking
Where Date_From <= Last_Day(SysDate)
and Date_To > Last_Day(Add_Months(SysDate, -1));
No First_Day

25. Bookings of the previous/next month
-- Bookings could be more than one month
Select *
From Booking
Where Date_From <= Last_Day(Add_Months(SysDate, -1))
and Date_To >= ((Add_Months(SysDate, -1)) -
To_Number(To_Char(Add_Months(SysDate, -1), 'dd')) + 1);

26. Bookings of the previous/next month
-- Bookings could be more than one month
Select *
From Booking
Where Date_From <= Last_Day(Add_Months(SysDate, -1))
and Date_To > Last_Day(Add_Months(SysDate, -2));

27. Schedule
Project Phase II Friday, April 7 Assignment 8 Due Friday, April 1, by 5 PM

28. Sample SQL Script File No Commit in the query SQL file!
Style
Sample SQL Script File No Commit in the query SQL file!