SQL Question
- From: deen dayal <deen.dayal@xxxxxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Mon, 03 May 2004 15:14:58 -0400
Hi,
I need somebody help with a SQL; I have a course_schedule table which has
id number,
course varchar2(20),
start_time date,
end_time date
Here is some data
NUMB COURSE START_NEW END_NEW
==== ==== ======= =================== ===================
1 1191 EDU*140 2004-05-01 09:00:00 2004-05-01 12:00:00
2 1192 EDU*210 2004-05-01 08:00:00 2004-05-01 09:35:00
3 1194 EDU*213 2004-05-01 18:00:00 2004-05-01 21:00:00
4 1195 EDU*225 2004-05-01 09:35:00 2004-05-01 11:00:00
5 1196 EDU*225 2004-05-01 11:10:00 2004-05-01 12:35:00
6 1198 EDU*226 2004-05-01 14:20:00 2004-05-01 17:35:00
7 1199 EDU*226 2004-05-01 19:00:00 2004-05-01 22:15:00
8 1201 EDU*228 2004-05-01 19:00:00 2004-05-01 22:15:00
9 1204 EDU*233 2004-05-01 19:00:00 2004-05-01 22:15:00
10 1205 EDU*250 2004-05-01 09:00:00 2004-05-01 12:00:00
11 1211 ENG*010 2004-05-01 08:00:00 2004-05-01 08:55:00
12 1212 ENG*010 2004-05-01 12:45:00 2004-05-01 14:10:00
13 1213 ENG*010 2004-05-01 19:00:00 2004-05-01 22:15:00
14 1216 ENG*011 2004-05-01 08:00:00 2004-05-01 08:55:00
15 1217 ENG*011 2004-05-01 09:05:00 2004-05-01 10:00:00
16 1218 ENG*011 2004-05-01 09:05:00 2004-05-01 10:00:00
17 1219 ENG*011 2004-05-01 10:10:00 2004-05-01 11:05:00
18 1220 ENG*011 2004-05-01 10:10:00 2004-05-01 11:05:00
19 1221 ENG*011 2004-05-01 11:15:00 2004-05-01 12:10:00
what I need is a SQL which can give me non overlapping course schedules
for a given set of courses, giving alphabetical priority to courses.
For example for a given set of courses EDU*140, ENG*010, ENG*011
ENG*010 2004-05-01 08:00:00 2004-05-01 08:55:00
EDU*140 2004-05-01 09:00:00 2004-05-01 12:00:00
ENG*010 2004-05-01 12:45:00 2004-05-01 14:10:00
ENG*010 2004-05-01 19:00:00 2004-05-01 22:15:00
I can not come up with any ideas, can some body please help?
Thanks for any ideas/help
Deen
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