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sql server programming : booking db design help
I am trying to create a web app that uses an SQL db to handle employee scheduling. I can design a table to hold the appointments with no problems but I need to be able to search for free time for the employees. all bookings are based on 30 minutes blocks. So far I managed to create all tables and this is what I have concerning the booking tables "after seeing this post on http://www.webservertalk.com/archive289-2005-9-1206387.html due to my lack of DB design I am having a hard time understanding the solution. eventually I need to be able to achieve the search using similar statement to this select min(starttime) from schedule where usedflag='free' and duration >= :desired_duration but I am having a problem with tables structure. would someone explain the structure posted please? thanks in advance
Thanks for the response Uri,
what I am thinking of best way to to describe the data is like this. I will create a table to hold sku's refering to the services to be booked the skutable should be something like this SKuID --PK Description --- char Durration -->30 minutes blocks number field where 1 = 30 and 2=60 and so on The employee table should be like this EmpID --->PK Fname Lname location ScheduleID -->FK the scheduletable should be like this SID --->PK sundayStart ---> ie 12/06/2006 9:30 AM SundayEnd ---> 12/06/2006 6:00 PM MondayStart MondayEnd TuesdayStart TuesdayEnd WedStart WedEnd ThurStart ThursEnd FridayStart FridayEnd SaturedayStart SatureDayEnd what I am trying to achieve can be described best as calenday with all employees, the workdays, starttime, endtime and the times they are available to take calls "calls are based on 30 minutes blocks incremening by 30 minutes. I hope that explains the issue better [quoted text, click to view] "Uri Dimant" <urid@iscar.co.il> wrote in message news:uij3ouzbGHA.536@TK2MSFTNGP02.phx.gbl... > sammy > It ishard to suggest soemthing without seeing the actual data and some DDL > Take a look at Itzik Ben-Gan's example showing the intreval connections to > the internet and resturns the connections was made less than 5 minutes > > create table tblConnection > ( > StartTimeCon datetime not null, > EndTimeCon datetime not null > > ) > > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 10:00','20000610 10:10') > > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 10:20','20000610 10:22') > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 10:23','20000610 10:25') > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 10:27','20000610 10:45') > > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 11:57','20000610 12:00') > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 12:01','20000610 12:04') > insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 > 12:04','20000610 12:40') > select * from tblConnection > > SELECT > StartTimeCon, > ISNULL( > (SELECT MIN(EndTimeCon) > FROM tblConnection AS S3 > WHERE S3.StartTimeCon >= S1.StartTimeCon > AND ISNULL( > DATEDIFF( > minute, > S3.EndTimeCon, > (SELECT MIN(StartTimeCon) > FROM tblConnection AS S4 > WHERE S4.StartTimeCon > S3.EndTimeCon)), 5) >= 5), > EndTimeCon) AS EndTimeCon > FROM tblConnection AS S1 > WHERE ISNULL( > DATEDIFF( > minute, > (SELECT MAX(EndTimeCon) > FROM tblConnection AS S2 > WHERE S2.EndTimeCon < S1.StartTimeCon),S1.StartTimeCon),5) >= 5 > > > > > "sammy" <sammy1971@hotmail.com> wrote in message > news:ejgXXazbGHA.4672@TK2MSFTNGP04.phx.gbl... >> Hey Guys, >> I am trying to create a web app that uses an SQL db to handle employee >> scheduling. I can design a table to hold the appointments with no >> problems but I need to be able to search for free time for the employees. >> all bookings are based on 30 minutes blocks. >> So far I managed to create all tables and this is what I have concerning >> the booking tables "after seeing this post on >> http://www.webservertalk.com/archive289-2005-9-1206387.html due to my >> lack of DB design I am having a hard time understanding the solution. >> >> eventually I need to be able to achieve the search using similar >> statement to this >> select min(starttime) >> from schedule >> where usedflag='free' >> and duration >= :desired_duration >> >> but I am having a problem with tables structure. >> would someone explain the structure posted please? >> thanks in advance >> >> >> > >
sammy
It ishard to suggest soemthing without seeing the actual data and some DDL Take a look at Itzik Ben-Gan's example showing the intreval connections to the internet and resturns the connections was made less than 5 minutes create table tblConnection ( StartTimeCon datetime not null, EndTimeCon datetime not null ) insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 10:00','20000610 10:10') insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 10:20','20000610 10:22') insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 10:23','20000610 10:25') insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 10:27','20000610 10:45') insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 11:57','20000610 12:00') insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 12:01','20000610 12:04') insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 12:04','20000610 12:40') select * from tblConnection SELECT StartTimeCon, ISNULL( (SELECT MIN(EndTimeCon) FROM tblConnection AS S3 WHERE S3.StartTimeCon >= S1.StartTimeCon AND ISNULL( DATEDIFF( minute, S3.EndTimeCon, (SELECT MIN(StartTimeCon) FROM tblConnection AS S4 WHERE S4.StartTimeCon > S3.EndTimeCon)), 5) >= 5), EndTimeCon) AS EndTimeCon FROM tblConnection AS S1 WHERE ISNULL( DATEDIFF( minute, (SELECT MAX(EndTimeCon) FROM tblConnection AS S2 WHERE S2.EndTimeCon < S1.StartTimeCon),S1.StartTimeCon),5) >= 5 [quoted text, click to view] "sammy" <sammy1971@hotmail.com> wrote in message news:ejgXXazbGHA.4672@TK2MSFTNGP04.phx.gbl... > Hey Guys, > I am trying to create a web app that uses an SQL db to handle employee > scheduling. I can design a table to hold the appointments with no problems > but I need to be able to search for free time for the employees. > all bookings are based on 30 minutes blocks. > So far I managed to create all tables and this is what I have concerning > the booking tables "after seeing this post on > http://www.webservertalk.com/archive289-2005-9-1206387.html due to my lack > of DB design I am having a hard time understanding the solution. > > eventually I need to be able to achieve the search using similar statement > to this > select min(starttime) > from schedule > where usedflag='free' > and duration >= :desired_duration > > but I am having a problem with tables structure. > would someone explain the structure posted please? > thanks in advance > > >
sammy
Take a look at http://www.aspfaq.com/show.asp?id=2519 [quoted text, click to view] "sammy" <sammy1971@hotmail.com> wrote in message news:OdtVFi0bGHA.1208@TK2MSFTNGP04.phx.gbl... > Thanks for the response Uri, > what I am thinking of best way to to describe the data is like this. I > will create a table to hold sku's refering to the services to be booked > the skutable should be something like this > SKuID --PK > Description --- char > Durration -->30 minutes blocks number field where 1 = 30 and 2=60 and so > on > The employee table should be like this > EmpID --->PK > Fname > Lname > location > ScheduleID -->FK > the scheduletable should be like this > SID --->PK > sundayStart ---> ie 12/06/2006 9:30 AM > SundayEnd ---> 12/06/2006 6:00 PM > MondayStart > MondayEnd > TuesdayStart > TuesdayEnd > WedStart > WedEnd > ThurStart > ThursEnd > FridayStart > FridayEnd > SaturedayStart > SatureDayEnd > > what I am trying to achieve can be described best as calenday with all > employees, the workdays, starttime, endtime and the times they are > available to take calls "calls are based on 30 minutes blocks incremening > by 30 minutes. > I hope that explains the issue better > > "Uri Dimant" <urid@iscar.co.il> wrote in message > news:uij3ouzbGHA.536@TK2MSFTNGP02.phx.gbl... >> sammy >> It ishard to suggest soemthing without seeing the actual data and some >> DDL >> Take a look at Itzik Ben-Gan's example showing the intreval connections >> to the internet and resturns the connections was made less than 5 minutes >> >> create table tblConnection >> ( >> StartTimeCon datetime not null, >> EndTimeCon datetime not null >> >> ) >> >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 10:00','20000610 10:10') >> >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 10:20','20000610 10:22') >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 10:23','20000610 10:25') >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 10:27','20000610 10:45') >> >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 11:57','20000610 12:00') >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 12:01','20000610 12:04') >> insert into tblConnection(StartTimeCon,EndTimeCon)values ('20000610 >> 12:04','20000610 12:40') >> select * from tblConnection >> >> SELECT >> StartTimeCon, >> ISNULL( >> (SELECT MIN(EndTimeCon) >> FROM tblConnection AS S3 >> WHERE S3.StartTimeCon >= S1.StartTimeCon >> AND ISNULL( >> DATEDIFF( >> minute, >> S3.EndTimeCon, >> (SELECT MIN(StartTimeCon) >> FROM tblConnection AS S4 >> WHERE S4.StartTimeCon > S3.EndTimeCon)), 5) >= 5), >> EndTimeCon) AS EndTimeCon >> FROM tblConnection AS S1 >> WHERE ISNULL( >> DATEDIFF( >> minute, >> (SELECT MAX(EndTimeCon) >> FROM tblConnection AS S2 >> WHERE S2.EndTimeCon < S1.StartTimeCon),S1.StartTimeCon),5) >= 5 >> >> >> >> >> "sammy" <sammy1971@hotmail.com> wrote in message >> news:ejgXXazbGHA.4672@TK2MSFTNGP04.phx.gbl... >>> Hey Guys, >>> I am trying to create a web app that uses an SQL db to handle employee >>> scheduling. I can design a table to hold the appointments with no >>> problems but I need to be able to search for free time for the >>> employees. >>> all bookings are based on 30 minutes blocks. >>> So far I managed to create all tables and this is what I have concerning >>> the booking tables "after seeing this post on >>> http://www.webservertalk.com/archive289-2005-9-1206387.html due to my >>> lack of DB design I am having a hard time understanding the solution. >>> >>> eventually I need to be able to achieve the search using similar >>> statement to this >>> select min(starttime) >>> from schedule >>> where usedflag='free' >>> and duration >= :desired_duration >>> >>> but I am having a problem with tables structure. >>> would someone explain the structure posted please? >>> thanks in advance >>> >>> >>> >> >> > >
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