I want to build a small event-registration tool.
Users should be able to book multiple events at different times.
Example
Event1
Time1 09:00 - 10:00 | Max Participants 12
Time2 11:00 - 12:00 | Max Participants 9
Event2
Time1 09:00 - 10:00 | Max Participants 6
Time2 11:00 - 12:00 | Max Participants 9
I think I need the tables "events", "reservation" and "reservation-in-progress".
But I'm not sure how to structure these.
My Idea:
events
event_id | host_id | date_of_event | title | description | time_1 | max_participants_1 | time_2 | max_participants_2
reservation
reservation_id | user_id | date_of_reservation | event_1 | time_1 | event_2| time_2
reservation-in-progress
reservation-in-progress_id | user_id | date_of_reservation | event_1 | time_1 | event_2| time_2 | time_end_of_blocked_reservation
your idea is right but no need to take second table reservation-in-progress you can simply add status field in the events or reservation table so you can mark status as in progress.
Thanks
Related
I'm working on an event system and would like to know how to get the range of time available to schedule. I have the following tables
Table1 (To record the availability of creating events)
| Date | Start Time | Final Time |
| ------------- |: -------------: | ----------- |
| 2019-02-01 | 09:00:00 | 12:00:00 |
| 2019-02-01 | 13:00:00 | 17:00:00 |
and then I have Table2 to properly record the events, taking into account the availability in Table1. Table2 and Table1 have the same fields. An example of the records in Table 2 would be the following:
Table2
| Date | Start Time | Final Time |
| ------------- |: -------------: | ----------- |
| 2019-02-01 | 08:00:00 | 11:00:00 |
| 2019-02-01 | 13:00:00 | 14:30:00 |
The specific question is: What would be the SQL query to be able to determine what are the remaining time ranges, available from Table1 with respect to those that have already been taken or set out in Table2.
I'm using Laravel but I can not get the exact SQL query that works for me in this case.
I would like to get this result:
| Date | Start Time | Final Time |
| ------------- |: -------------: | ----------- |
| 2019-02-01 | 08:00:00 | 09:00:00 |
| 2019-02-01 | 11:00:00 | 12:00:00 |
| 2019-02-01 | 14:30:00 | 17:00:00 |
I hope I was clear. Thanks in advance.
I am creating a processing system in PHP, I read tons of tutorials over the internet but nothing
seems to satisfy what I need for my system.
I have table SCHEDULE in SQL..
+----+------+---------------------+
| ID | Name | Description |
+----+------+---------------------+
| | | |
| 1 | D | Daily |
| 2 | W | Weekends |
| 3 | EOM | End Of the month |
| 4 | 11d | 11 day of the month |
| 5 | M | Monday |
+----+------+---------------------+
And Table PROCESS..
+----+---------------+-----------+
| ID | Schedule_id | Name |
+----+---------------+-----------+
| 1 | 1 | Process 1 |
| 2 | 2 | Process 2 |
| 3 | 3 | Process 3 |
+----+---------------+-----------+
What I want is to automatically show the process on each days base on their schedule.
Meaning:
if Process1 = D RUN Process1 everyday
if Process2 = W RUN ONLY Process2 on weekends
if Process3 = 11d RUN ONLY Process3 on the 11th day of the month
I also want them to store on my calendar and also how about holidays?
All answers will be appreciated thanks.
I understand that activities don't have an associated schedule, so you can be at any given time. Taking that as a starting point, you can run a cronjob, every day, through a script in PHP which being entrusted to compare the tasks that the day should be made and there using shell_exec() php function to run the process in bash or in what you have defined.
That is:
For each record in "sheduled" you compare the date (If today, tomorrow or the weekend) and if there is a match, run the associated process.
The system is as such. Tutors provide their availability (Monday - Sunday) and the time frame they are available on that day (0700 - 1400) (ie: 7am - 2pm).
I am trying to figure out the best way to store and search through this information to find available tutors. Searching only needs to be done on a daily system (ie: day of the week - mon, tues, wed, etc).
My planned infrastructure:
//Tutor Availability
---------------------------------------------------------------------------
tutorID | monday | tuesday | wednesday | thursday | friday |
---------------------------------------------------------------------------
27 | 0700-1200 | NULL | 1400-1800 | NULL | NULL |
---------------------------------------------------------------------------
35 | NULL | 1400-1600 | NULL | NULL | 1100-1900 |
//Scheduled tutor sessions
------------------------------------
tutorID | day | time |
------------------------------------
27 | monday | 0700-0900 |
------------------------------------
35 | friday | 1300-1500 |
Query: SELECT tutorid FROM tutoravailability WHERE 'monday'=... is available between 0900-1100 and is not in scheduled tutor session.
I have been searching forever about how I can search through (and store) these time intervals in MySQL. Is this the best way to store the time intervals of a 24 hours day? Will it even be possible to search between these intervals? Am I approaching this from the wrong way? Any insight is appreciated.
Updated Infrastructure
//Tutor Availability
-----------------------------------------------------
tutorID | day | start_time | end_time | PK |
-----------------------------------------------------
27 | mon | 0700 | 1200 | 1 |
-----------------------------------------------------
27 | fri | 1400 | 1800 | 2 |
-----------------------------------------------------
35 | tue | 1100 | 1600 | 3 |
//Scheduled tutor sessions
--------------------------------------------------------
tutorID | day | start_time | end_time | PK |
--------------------------------------------------------
27 | mon | 0800 | 1000 | 1 |
--------------------------------------------------------
27 | fri | 1600 | 1800 | 2 |
So with this system it will be much simpler to search for available times. However I am still at a loss as to how to compare the availability against the scheduled lessons to ensure no overlap.
SELECT tutorID
FROM tutoravailability WHERE day = 'fri'
AND start_time <= '1400'
AND end_time >= '1530'
Now I don't understand how I would compare this query against the Scheduled tutor sessions table to avoid duplicate bookings.
Final Update
To ensure their are no overlapping of the Scheduled Tutors sessions I will use the MySQL BETWEEN clause to search for the start and end time.
If you store the time interval using two columns it will be much easier for you to perform a search using sql query.
i.e. tutorID, day, startTime, endTime
You can use a bit flag to indicate the availability (24 bit) and scheduled time (24 bit). Then you can use 24 bit to represent the available hours and scheduled hours for each day.
In the Tutor Availability table, let's say '1' stands for Available in and '0' stands for unavailable. In the Scheduled table, '0' stands for Scheduled, '1' stands for Unscheduled.
So the available interval 0900-1100 can be stored as POW(2,9) | POW(2,10) | POW(2,11); the scheduled 1000-1200 can be stored as ^(POW(2,10) | POW(2,12))
Then the following query can give your the availability of on tutor - available on Monday between 09 am to 11 am:
SELECT ta.tutorid FROM tutoravailability ta, tutorscheduled ts
WHERE ta.tutorid = ts.tutorid AND ts.day = 'monday'
AND (ta.monday & ts.time & (POW(2,9) | POW(2,10) | POW(2,11))) = (POW(2,9) | POW(2,10) | POW(2,11))
I'm working on a (what I was intending to be) simple PHP/MySQL app. As part of it I'd like to be able to model repeating events, however I need to be able to query all the events that happened between two dates (including repeated events). The events only have a date, the time of day doesn't matter.
I've been researching this and have looked in to various approaches including Calendar Recurring/Repeating Events - Best Storage Method and Repeating calendar events and some final maths.
However, any example of a database schema supporting this that I find online, only seems to support querying for events that happened on a certain day. There is no support for events that happened between a range of dates.
As an abstract example
Events table (with some sort of repeat representation):
Event | Start Date | Repeats
-------------------------------------
Meeting | 10/Dec/2012 | Every 7 days
Lunch | 10/Dec/2012 | Every 1 days
Target result of abstract query SELECT Events BETWEEN 09/Dec/2012 AND 20/Dec/2012
Event | Date | Repeats
-------------------------------------
Meeting | 10/Dec/2012 | Every 7 days
Meeting | 17/Dec/2012 | Every 7 days
Lunch | 10/Dec/2012 | Every 1 days
Lunch | 11/Dec/2012 | Every 1 days
Lunch | 12/Dec/2012 | Every 1 days
Lunch | 13/Dec/2012 | Every 1 days
etc...
Lunch | 20/Dec/2012 | Every 1 days
Is there a database schema that will support these kind of queries? How would I go around making a query on that schema for any event (including repeating events) that happened between two days?
Or perhaps a design pattern that is used for repeating events?
I would create a tally table with just one col called id and fill that table with numbers from 0 to 500. Now we easily use that to make selections instead of using a while loop.
Id
-------------------------------------
0
1
2
etc...
Then i'd store the events in a table with Name as varchar, startdate as datetime and repeats as int
Name | StartDate | Repeats
-------------------------------------
Meeting | 2012-12-10 00:00:00 | 7
Lunch | 2012-12-10 00:00:00 | 1
Now we can use the tally table to select all dates between two dates by using:
SELECT DATE_ADD('2012-12-09 00:00:00',INTERVAL Id DAY) as showdate
FROM `tally`
WHERE (DATE_ADD('2012-12-09 00:00:00',INTERVAL Id DAY)<='2012-12-20 00:00:00')
ORDER BY Id ASC
ShowDate
-------------------------------------
2012-12-09 00:00:00
2012-12-10 00:00:00
2012-12-11 00:00:00
2012-12-12 00:00:00
2012-12-13 00:00:00
2012-12-14 00:00:00
2012-12-15 00:00:00
2012-12-16 00:00:00
2012-12-17 00:00:00
2012-12-18 00:00:00
2012-12-19 00:00:00
2012-12-20 00:00:00
Then we join this on the events table to calculate the difference between the startdate and the showdate. We devided the results of this by the repeats column and if the remainder is 0, we have match.
All combined becomes:
SELECT E.Id, E.Name, E.StartDate, E.Repeats, A.ShowDate, DATEDIFF(E.StartDate, A.ShowDate) AS diff
FROM events AS E, (
SELECT DATE_ADD('2012-12-09 00:00:00',INTERVAL Id DAY) as showdate
FROM `tally`
WHERE (DATE_ADD('2012-12-09 00:00:00',INTERVAL Id DAY)<='2012-12-20 00:00:00')
ORDER BY Id ASC
) a
WHERE MOD(DATEDIFF(E.StartDate, A.ShowDate), E.Repeats)=0
AND A.ShowDate>=E.StartDate
Which results in
Id | Name |StartDate | Repeats | ShowDate | diff
---------------------------------------------------------------------------------
1 | Meeting | 2012-12-10 00:00:00 | 7 | 2012-12-10 00:00:00 | 0
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-10 00:00:00 | 0
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-11 00:00:00 | -1
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-12 00:00:00 | -2
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-13 00:00:00 | -3
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-14 00:00:00 | -4
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-15 00:00:00 | -5
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-16 00:00:00 | -6
1 | Meeting | 2012-12-10 00:00:00 | 7 | 2012-12-17 00:00:00 | -7
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-17 00:00:00 | -7
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-18 00:00:00 | -8
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-19 00:00:00 | -9
2 | Lunch | 2012-12-10 00:00:00 | 1 | 2012-12-20 00:00:00 | -10
Now you could (and should!) speed things up. For instance by directly storing dates in a table so you can just select all dates directly instead of using a tally table with dateadd. Every thing you can cache and dont have to calculate again is good.
I didn't quite understand your goal... Maybe you were looking for UNIQUE function in SQL?
Project: I am working on a project which is about some rooms and equipments using in the rooms. The software is about scheduling the equipments in the rooms. In other words, it is a reservation software that reserves selected equipments in separate rooms for needed dates and times ranges. I have many tables in MYsSQL database working with Php but I will mention the tables my question is about. The tables I will relate my questions are equipment table (Table A), schedule table (Table B) and equipments using in the related schedule (Table C).
Table A: equipment list table
eqid | eqName | available|
1 | book | 90 |
2 | pen | 82 |
3 | computer | 25 |
In table A; eqid represents unique id of an equipment, eqName represents name of an equipment, available represents total available equipments existing.
Table B: schedule table
scheduleid | startDate | endDate | startTime | endTime | office |
1 | 2012-08-27 | 2012-08-27 | 08:30:00 | 10:00:00 | room1 |
2 | 2012-08-27 | 2012-08-27 | 09:30:00 | 11:00:00 | room3 |
3 | 2012-08-28 | 2012-08-30 | 08:30:00 | 12:00:00 | room2 |
4 | 2012-08-29 | 2012-08-31 | 11:30:00 | 14:00:00 | room1 |
5 | 2012-08-28 | 2012-08-28 | 10:30:00 | 14:00:00 | room3 |
6 | 2012-08-27 | 2012-08-30 | 08:30:00 | 10:00:00 | room4 |
7 | 2012-08-27 | 2012-08-27 | 10:30:00 | 12:00:00 | room4 |
8 | 2012-08-27 | 2012-08-30 | 08:30:00 | 11:00:00 | room6 |
9 | 2012-08-27 | 2012-08-27 | 10:30:00 | 12:00:00 | room5 |
In table B; scheduleid represents unique id for a schedule, startDate and endDate are date range for a schedule, startTime and endTime time range for a schedule, office means that where the schedule will take place. Let me give an example here. Scheduleid 1 means there is a reservation on 27th of august 2012, Monday and it is from 08.30 to 10:00. As it start and end on same day this is just one day reservation in room1. However, Scheduleid 3 means there is a reservation starts on 28th of august 2012, Tuesday and goes on until 30th of august 2012, Thursday at 08:30-12:00... in other words, it lasts for 3 days and everyday from 08:30 to 12:00... So there is a reservation from Tuesday to Thursday at 08:30 to 12:00 in room2... I hope this is clear.
Table C: equipments using in the related schedule
Autoid | scheduleid | eqid | amountInSch|
1 | 1 | 1 | 2 |
2 | 1 | 2 | 3 |
3 | 1 | 3 | 1 |
4 | 2 | 1 | 1 |
5 | 2 | 2 | 1 |
6 | 2 | 3 | 2 |
7 | 3 | 2 | 1 |
8 | 3 | 3 | 3 |
9 | 4 | 2 | 1 |
10 | 4 | 3 | 1 |
11 | 5 | 1 | 1 |
12 | 6 | 1 | 1 |
13 | 6 | 3 | 2 |
14 | 6 | 2 | 4 |
15 | 7 | 1 | 5 |
16 | 7 | 2 | 6 |
17 | 8 | 2 | 1 |
18 | 9 | 1 | 8 |
19 | 9 | 2 | 5 |
20 | 9 | 3 | 6 |
In table C: Autoid represents unique automatic id generated by auto-increment, scheduleid comes from Table B, eqid comes from Table A, amountInSch represents how many (amount) equipment will use in the related schedule. I want to give an example here. Scheduleid 1 in Table C, there are 3 rows. This means that scheduleid 1 related in TAble B will use 2 books (eqid 1), 3 pens (eqid 2) and 1 computer (eqid 3) in room1 specified dates and times in table B . Another example is that scheduleid 3 in Table C is related 2 rows. It means that 1 pen (eqId 2) and 3 computers (eqId 3) will be using in room2 from 27th to 30th of august 2012 everyday from 08:30 to 12:00.
The above is the explanation and give some information about the project. The table rows are not permanent. When you make a reservation, there will be a new row in Table B and if it is selected an equipment, there will be new rows in table C...
The Question:
I want to calculate left amount of a specific equipment when I supply eqId, startDate, endDate, startTime and endTime...
An example:
eqId: 1 (book)
startDate: 2012-08-27
endDate: 2012-08-27
startTime: 08:30:00
endTime: 12:00:00
Result should be: 14 books used in schedule and 76 left available books
Because: if you look scheduleIds and related eqIds, you will only see 1, 2, 6, 7, 9 scheduleIds related to my query(dates and eqId). If you sum the all amount of related in Table C, you will get the wrong result. In other words, related amounts for eqId(1-book) and for 1, 2, 6, 7, 9 scheduleIds are 2, 1, 1, 5, 8 respectively. So if you sum them you will get 17 which is wrong. Because, 1 and 9 schedule don't intersect each other in terms of start and end Times, and 6 and 7 don't intersect each other either. as a result of them 2 stays lonely and can be count separately. We must consider 1 and 9 as summed 8 because 8 is bigger than 2. it is same for 6 and 7, considered as 5 because of 5 is bigger than 1...
So folks! I am not sure how I can sum/ this in programming algorithm. Is there a way to do in SQL or do I have to use PHP and Mysql together? and How?
Cheers!
SQLFiddle Records
I started with the following SQL to gather all date ranges that intersect with the given range:
SELECT MAX(available) - IFNULL(SUM(amountInSch), 0)
FROM Table1
LEFT JOIN Table3 USING (eqid)
LEFT JOIN Table2 USING (scheduleid)
WHERE DATE(startDate) <= '2012-08-27' AND DATE(endDate) >= '2012-08-27'
AND endTime > '08:30' AND startTime < '12:00'
AND eqid = 1
Fiddle
This is only the first part. Next up you have to work out the possible overlaps; this wouldn't be practical to do with SQL, so I would suggest to do this in PHP.
The generic algorithm I would pick is unfortunately O(n**2), it goes like this:
create a timeline (demarcated by each day) with time as the horizontal axis
iterate over every date/time range and mark the time of its left and right edge to create time segments of every possible permutation.
using the segments, you sum vertically for overlaps and you take the daily maximum across.
Hope that helps.