Preventing Duplicate Records Being Entered (Double Bookings)
Oct 24, 2006
I have a form which allows the user to book rooms.
On this form, there are the following fields:
BookingID: (Autonumber)
RoomID: Text box
Time:Text Box
Date: Text Box
Class: Text Box
Teacher: Text Box
The form adds this information to the Booking table.
What I'm looking to do is prevent the user from double booking a room,like being able to check if the Room is already booked at that time and date, before the new information is added to the table and the room becomes double booked.
Basically this would be checking the RoomID, Time and Date fields, as everything else is irrelevant. What would be the best way to do this?
I am new to Access and have made a database for a shuttle company that keeps track of their bookings. I need to prevent from the same booking being entered twice. I have a "Booking Form" that was made from a table "Master List". I was wondering if there was a way to compare three of the fields and if they match then a error would pop up.
I think if the "client's name", "booking date", and "pick up time" matched then a "booking already exists"... and also there are four different people can enter data and they have a log in form how can I get their "username" to be put into a field on the "Master List" automatically...
I have two different fields in a table. Month/Year and Location.When a user is entering data in a form, I want a message to be displayed if the location AND month/year are the same to tell the user that they are entering a duplicate record. I can't put unique keys on either of these fields because there is going to have to be duplicates in each field.
I have a table called tblCompanies in which I have a field called CompanyName that is indexed set to "no duplicates". However, I want access to be able to pick out probable duplicates instead of only exact duplicates.
So, for example, if "Butter Fingers" is entered and "Butterfingers" is already in the database, I want access to prevent the new record from being created.
The code I found on MS Developer's reference only prevents exact duplicates which seems pointless since this can be done just as effectively on the table level using an index.
Anyway, here is the code:
Private Sub CompanyName_BeforeUpdate(Cancel As Integer) If (Not IsNull(DLookup("[CompanyName]", _ "tblCompanies", "[CompanyName] ='" _ & Me!CompanyName & "'"))) Then MsgBox "Company has already been entered in the database." Cancel = True Me!CompanyName.Undo End If End Sub
Can it somehow be modified to do what I want it to do?
I have a table with a multi-field unique index: PatientID TestId TestDate Examiner
The problem is, date and/or examiner can be blank until that information is updated. I want those null values to be understood as actual values so that multiple instances of that "waiting to be updated" record do not occur. Is it possible for Access to understand my indexes in the following way?
I work across a number of small venues which have art cases that can be booked for displays. I am trying to build a simple data base to report what space is available and also what art is currently being displayed. The art is usually booked by month, but sometime it can be booked for a week etc.
I have set up 3 tables
Art Inventory
Art Cases by Venue
Art Case Bookings
In the art case booking form, I have set up the start and end date but I cannot figure out how to avoid double bookings of a case? Once I have that worked out I believe I know how to build the required reports for my needs.
I am supposed to make a database for a hotel system, how I could prevent double bookings.
My Reservation Table has the following fields:
Reservation No. (PK) Room No. (FK) Customer ID (FK) Payment ID(FK) Reservation In Date Reservation Out Date
Together with preventing double bookings is there a way automatically that can mark in the Room Table, the status as "available" or "booked" automatically by looking at the date today?
1. I'm in need of some way of preventing a user from opening form B unless he has entered information in form A.
Right now it is possible to open form B without entering data in form A (form A being the date/time info and form B being the case technical info) due to which a record is created for clientnr 0 (which should be a non existing client). Querying for clientnr 0 from time to time and deleting those records is easy enough, but who knows what kind of relevant data could be stored accidentally in a record that doesn't belong there.
This happens by the way, even though referential integrity is enforced throughout the dbase. Maybe I should say, because of that. I want to keep it that way of course to prevent orphans roaming around. But having orphans for clientnr. 0 is also not a good idea.
2. What is the wiser thing to do: keep all information concerning one case for one client (date/time info per case, techinfo per case, maybe even products sold info per case, payment info per case) in one table and have the data needed for each thing entered in seperate forms, or have all data split up into seperate tables like I have now. One for clients, one for dates and times, one for the technical info for that case etc.... ?
It is starting to seem a bit ehrm... useless to have all that data for one case floating around seperate tables. I don't know... it seems so much more complex (having to create multiple relations, multiple PK's per table etc.).
Where do I draw the line? For example the image attached (relationship2.jpg): now I have one PK in the table holding the clients (clientnr), two PK's in the table holding the case date/time info (clientnr and casenumberdatetimeinfo), three PK's in the table holding the techinfo (clientnr, casenumberdatetimeinfo and casetechinfonr). And what's next? Four PK's in the table holding the sold productsinfo? Five PK's in the table holding the invoice info? And what about the relations between those tables? Right now I can still comprehend.... but when I start thinking ahead, I'm starting to get dizzy. So some advice on this would really be highly appreciated.
3. Which build up of the relations between the tables in the dbase is better? The one in relationship.jpg or the one in relationship2.jpg?
I have Table for rooms called Rooms, and the data in the table is roomNumber which is in the format Letter and two Digit number, so A01 would be dorm building A and room building 1, and I then have a seperate row named roomType that is either VIP or Semi Private.
Now I am creating a form where a worker will put in there scheduledCheckin date and scheduledCheckout date and it will be written to the Bookings table. I would like this form however to take the dates they have put in, as well as room type (Semi-Private or VIP, and assign them an available room that isn't booked at all in that range) or list all available rooms for that range of time and they could then just select the room. I would rather it automatically assigns an available room based on room type though because this check in system is going to have about 500 rooms.
I've attached a link for what I have so far. I know how to make a query to list anyone who has booked rooms over that date, but need one for just preventing booking the same room.
Hi all, I am currently using this code in the before Update event of the Surname Textbox on a form. The first Textbox is FirstName. The second one is Surname.
If (Not IsNull(DLookup("[FirstName]", _ "Employee", "[FirstName] ='" _ & Me!FirstName & "'"))) And (Not IsNull(DLookup("[Surname]", _ "Employee", "[Surname] ='" _ & Me!Surname & "'"))) Then MsgBox "Someone already exists with the same name! Please check for duplicates", vbCritical, "IPDMS" Me.Undo End If
However once the user has entered the surname and tries to save the record the MsgBox is coming up. Basically what is happening is the first name is coming up as the duplicate entry only. I need to prevent the whole name (first name and surname together) from being duplicated.
I am attempting to make a system where the lifespan of baskets in a production process can be tracked. In order to do this I am looking to create a form to input when a new basket is introduced.Each basket has a 'disc' associated with a number on (BasketNumber), however these discs are reused once the basket breaks which is making it more difficult.
I have a form (Add_New_Basket) which feeds into a table (Active_Basket); what I am trying to do is make sure that a new basket cannot be introduced with the same disc number as an active basket. The way I am trying to determine which baskets are active is that I have an end date, that is filled in once the basket has been scrapped.
Therefore I am trying to set my Add_New_Basket form to restrict me entering a new record with BasketNumber 999, if there is already a BasketNumber 999 in the table with 'EndDate' null. If there is BasketNumber 999 and EndDate is dd/mm/yyyy then it can create the entry.My form Add_New_Basket has fields ID (which is hidden), BasketNumber, StartDate (=Date()).My table has fields: ID, BasketNumber, StartDate, EndDate
I have a fairly simple database we are using for keeping inventory and new items get added through a form. Is there A way I can prevent a part number and its properties from being entered if that same part number has already been entered at an earlier point in time?
I am working on a database to track IT assets with third parties. I have a table called "Equipment" that includes info like model, serial numbers, purchase price, date, location, and "Asset ID". I have a second, single field table called "asset tag" that is just a list of asset ID tags, XYZ1000, XYZ1001, XYZ1002..
I created a one to one relationship between the two tables on the following fields: "equipment.assetID" and "asset tag.asset ID"
Once an "asset ID" is used, I would like it to either be grayed out or disappear from the list of available ID tags. Basically, I want it so that each "asset tag. Asset ID" can only be used once.
I want to stop duplicate entries from being entered on form. I have read through the thread , however I am totally confused as it seemed to be v high level complex queries. I am looking at:
Preventing duplicate entries to be entered
It should show an error "Saying entry already exists" Do you want to check,edit or add new...
Hi folks, I have this situation: a table with patients information and IDs, and a table with evaluations for those patients (identified by ID). I am trying to make it so that the user can't add the same evaluation twice. I want to do it by checking if there is already an evaluation for that patient with the same date. I know how to show evaluations only for a patient, but I don't know how to check if the value entered by the user in the date field is a duplicate (case in which he shouldn't be allowed to enter it). I assume this is done somehow through the "validation rule" property? But how should the expression be? Thanks a lot!
Hello everyone. It has been many years since I played with this stuff and I probably wouldn't be now, if not for an emergency. I know there is probably an example here that all ready explains what I need, but honestly, I am not real familiar with the terms and wouldn't know where to begin looking for it.
I am old and don't intend to make a career out of this, I just need to fix a database. We had a bookkeeper at our small business who, for years, maintained our mailing list. It was her own design, though she knew nothing about it and learned as she went along. We never interfered because she did her job flawlessly in her own little, confussing round-a-bout way. She is gone now and we have to make heads or tails of this. We decided the quickest and easiest way was to blow the old db away, use as much of the basic fields that we could sacrifice and start over. It's just a simple mailing list, but it contains over 9000 records.
Her method of entering records was from the table view. Yep, starting a new line at the bottom of the table and then entering the 94 fields of information that applied to the new record. I have created a form today that does this now and simplifies this process. Her method of preventing multiple records, was to scroll down the table and see if she had already entered the record previously. This is my question.
My first approach to resolving this issue in my new form, was to create a ComboBox on the form to do a lookup using Last and FirstName. Due to the fact that this ComboBox will need additional fine tuning that I don't understand, when I use it, it does auto-complete the last name "Anderson" as I type it and it highlights the first "Anderson" record in the db, but It doesn't do any sorts in this same ComboBox to bring the rest of the "Anderson" records to the top so I can then check for a matching FirstName. I'm sure this requires changes in the property of the ComboBox that I don't understand. Or, maybe I shouldn't even be using the ComboBox.
Actually, I would bet there is a way that I can alter my table so that it would not allow me to put in a duplicate record and therefore, eliminating the need to even look anything up.
Any ideas or direction with this would be greatly appreciated. Since I am only the person creating this and not the person(s) that will actually be using it, I should find a method for this that will be simple for anyone adding records. Hopefully, in a day or so, I can be done with this and get back to my real job here as a mechanic, not a programmer. :eek:
I have a query with following sql SELECT tblTrip.PaySlipReference, Sum(tblTrip.NDays) AS TotNDays, Sum(tblTrip.FlyingTime) AS TotFlyingTime, Sum(tblTrip.DutyTime) AS TotDutyTime, Sum(tblTrip.TAFB) AS TotTAFB, Sum(tblTrip!DutyPayRate*tblTrip!TAFB) AS TotDutyPay FROM tblTrip GROUP BY tblTrip.PaySlipReference;
I cannot find a solution for 2 questions: 1 - I need to count the number of records it has grouped as PayslipReference 2 - I need to double click on the field PaySlipReference and obtain list of all the records related to the PaySlipReference wich I have doubleclicked
I'm in desperate need of a (simple I guess) code to allow me to send records from my listbox to a new form. Scenario goes as follows:
I use cascading combo boxes to narrow my available choices and finally end up with a listbox presenting the records filtered through cascading process. Now, I want to double-click on a record and load a new form with all this record's fields.
This is the code used to populate the listbox:
Private Sub FilterTypeList() Dim strRS As String ' Filter the list box appropriately based on the combo box selection(s) strRS = "SELECT qryTaxonomy.Type, qryTaxonomy.Article FROM qryTaxonomy"
[Code] ....
What is the code to open a form with the double-clicked record's fields, as described above?
I am new here and have been using the build features (and not the code as I do not understand this) to build my registration database.
I have several tables of imported data nicely displayed in one form with tabbed sections. When I tried adding new records by entereing them in the form, they are saved in the underlying tables but the new records are not displayed in the form when I go back into the form.
All the tables seem to be linked to the form when I go into the form selector and Edits are allowed in the property box.
Hi People, I am working on a database related application in which the user enters the data from the form and it is stored in 3 related tables in DB.
This is what I want to do,
If IsNull(Me.Q1_2005) = True Or Me.Q1_2005 = "" Then rs!January2005 = Me.Jan_05 rs!February2005 = Me.Feb_05 rs!March2005 = Me.Mar_05 If parametername = "time" then rs!Q12005 = DMax([Me.Jan_05], [Me.Feb_05], [Me.Mar-05]) else rs!Q12005 = DMin([Me.Jan_05], [Me.Feb_05], [Me.Mar-05]) End If
If user enters monthly data of Jan'05, Feb'05 and Mar'05, but he is not entering quarterly data of 2005 Q1. So I need to update Q1 data in that record, that has a condition. If the parameter name is time then I want maximum of the three month data assigned to Q1 record in DB table else I want minimum of those three text box values assigned to Q1 record in DB table.
Please help me with this kind of conditional statement.
I have a database for police officers to enter their daily activity. For example on arrests, Date:_____ Drugs____DUI___
The officers enter the date and the total number arrested for each charge. I want to print a monthly report. How do I make the report print this information for a specific date range? The way I have it now, it asks for the startdate and enddate, but it still totals every record, not just the date range.
