From: Kathy R. on 27 Mar 2010 16:36 I am having trouble figuring out how to set up tables/fields for the following problem. Can someone please point me in the right direction? I currently have three tables: tblIndividual IndID FirstName LastName tblAttendance (join table between the other two) AttendID AtIndID AtEventID tblEvent EventID EventName other event info I have been asked to include a field which would keep track of options each individual chooses for each event. Currently there are three options (receive newsletter, receive a call, join), but I can envision adding more in the future. An individual can choose none, one, or more than one of those options. I was thinking that I should add another foreign key to tblAttendance, and a new table of event options. But I just can't seem to picture how that is going to work. Do I store all of the options chosen in one field? That doesn't seem right either. As you can see, I am just getting more confused. Once I get the tables set up correctly, how do I set up the form so that I can easily choose the options? I suspect that I will be able to figure this out easily once I see the table set up, but thought I'd ask in advance. I really appreciate any help you can give me. Kathy R.
From: Steve on 27 Mar 2010 17:13 Kathy, The answer is in your sentence, "An individual can choose none, one, or more than one of those options." When there are one or more of something, you have a one-to-many relationship. When you have a one-to-many relationship, you always need a table on the many side. So you need a new table to record the options each individual chooses for each event. Backing up a second, first you need a table to record what the options are: TblOption OptionID Option You can always add more options to TblOption in the future! You record the events each individual attends in TblAttendance. When you look at a record for any AttendID, you know who the individual is and which event he attended. So to record the options each individual chooses for each event, you need a new table and one of the fields needs to be AttendID: TblChosenOption ChosenOptionID AttendID OptionID So for data entry, you could use a main form with a subform that contains a subform. The main form would be based on TblEvent. The subform would be based on TblAttendance. Set the Linkmaster property to EventID and set the Linkchild property to AtEventID. For the subform contained in this subform, base the subform on TblChosenOption. Set the LinkMaster property to AttendID and set the LinkChild property to AttendID. You will need to Google to find how to set this up if you want the subform to be continuous. Steve santus(a)penn.com "Kathy R." <geneseoumc(a)frontiernet.net> wrote in message news:J_trn.115193$K81.4991(a)newsfe18.iad... >I am having trouble figuring out how to set up tables/fields for the >following problem. Can someone please point me in the right direction? > > I currently have three tables: > > tblIndividual > IndID > FirstName > LastName > > tblAttendance (join table between the other two) > AttendID > AtIndID > AtEventID > > tblEvent > EventID > EventName > other event info > > I have been asked to include a field which would keep track of options > each individual chooses for each event. Currently there are three options > (receive newsletter, receive a call, join), but I can envision adding more > in the future. An individual can choose none, one, or more than one of > those options. > > I was thinking that I should add another foreign key to tblAttendance, and > a new table of event options. But I just can't seem to picture how that > is going to work. Do I store all of the options chosen in one field? > That doesn't seem right either. As you can see, I am just getting more > confused. > > Once I get the tables set up correctly, how do I set up the form so that I > can easily choose the options? I suspect that I will be able to figure > this out easily once I see the table set up, but thought I'd ask in > advance. > > I really appreciate any help you can give me. > > Kathy R.
From: Kathy R. on 28 Mar 2010 12:27 Thank you Steve, that was the nudge in the right direction that I needed. Kathy R. Steve wrote: > Kathy, > > The answer is in your sentence, "An individual can choose none, one, or more > than one of those options." > > When there are one or more of something, you have a one-to-many > relationship. When you have a one-to-many relationship, you always need a > table on the many side. So you need a new table to record the options each > individual chooses for each event. Backing up a second, first you need a > table to record what the options are: > TblOption > OptionID > Option > > You can always add more options to TblOption in the future! > > You record the events each individual attends in TblAttendance. When you > look at a record for any AttendID, you know who the individual is and which > event he attended. So to record the options each individual chooses for > each event, you need a new table and one of the fields needs to be AttendID: > TblChosenOption > ChosenOptionID > AttendID > OptionID > > So for data entry, you could use a main form with a subform that contains a > subform. The main form would be based on TblEvent. The subform would be > based on TblAttendance. Set the Linkmaster property to EventID and set the > Linkchild property to AtEventID. For the subform contained in this subform, > base the subform on TblChosenOption. Set the LinkMaster property to AttendID > and set the LinkChild property to AttendID. You will need to Google to find > how to set this up if you want the subform to be continuous. > > Steve > santus(a)penn.com > > > "Kathy R." <geneseoumc(a)frontiernet.net> wrote in message > news:J_trn.115193$K81.4991(a)newsfe18.iad... >> I am having trouble figuring out how to set up tables/fields for the >> following problem. Can someone please point me in the right direction? >> >> I currently have three tables: >> >> tblIndividual >> IndID >> FirstName >> LastName >> >> tblAttendance (join table between the other two) >> AttendID >> AtIndID >> AtEventID >> >> tblEvent >> EventID >> EventName >> other event info >> >> I have been asked to include a field which would keep track of options >> each individual chooses for each event. Currently there are three options >> (receive newsletter, receive a call, join), but I can envision adding more >> in the future. An individual can choose none, one, or more than one of >> those options. >> >> I was thinking that I should add another foreign key to tblAttendance, and >> a new table of event options. But I just can't seem to picture how that >> is going to work. Do I store all of the options chosen in one field? >> That doesn't seem right either. As you can see, I am just getting more >> confused. >> >> Once I get the tables set up correctly, how do I set up the form so that I >> can easily choose the options? I suspect that I will be able to figure >> this out easily once I see the table set up, but thought I'd ask in >> advance. >> >> I really appreciate any help you can give me. >> >> Kathy R. > >
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