Supermarket Database... Unsure About Relationships
Mar 31, 2006
Is this relationship correct (see attachment)? When i create an orders query with the fields:-
Barcode number (source: orders/products table)
Product name (source: products table)
Quantity (source: orders/products table)
Unit price (source: products table)
Total (calculated - [Unit price]*[Quantity] )
it does not allow data entry for barcode number and quantity (product name and unit price should appear automatically when barcode no. entered) why is that? and how could i resolve this?
attached also is my database to see what i mean... if u have time can u please make the modifications NEEDED and send me the modified one, if not just give me a textual description of what i should do..... (btw it is actually a school canteen system databse, thats why i have customerID field as student administration number or staff initials)
I am unsure about the relationships for this database, which is a big problem. Also, I created a query but some fields do not allow data entry, which in turn had the same effect when I created a form from the query. I think it's because i selected the fields from the wrong table or i donno. You will understand exactly what i mean when u see my database (attached). If u see disabled fields in my form i did that in purpose because i expect them to be displayed automatically when i enter the data. If u have time can u please make the changes needed and send me the modified database attached, if not just give me a textual description of what i should do..
thanks a lot, please reply soon...... i need urgent help
I want a good describe about how to create database for supermarket specially how to build a form for selling item, what is a structure of tables ........
I am making a database for a somebody who sends some of his work to subcontractors. He needs to be able to pull a monthly report on the work that his subcontractors have done along with the amount of money owed to them and I don't know how to do this. I know I should make a query but how do I make it so it figures the amount owed for each individual subcontractor?
I would like to create a small HR database that holds:
* Employee details (Name, Date of birth, Entry Date, Exit Date, Function,Department, Shift) * Departments * Departments and capabilities needed * Employee, departments and capability achieved (1=yes, 0=no)
The idea would be to have a link between the employee the departments capabilities I can tick fields of the capabilities they have or have achieved.
When I have this I could run a report that shows a score per employee For example:
Name: Department: Orderpicking: Packing: Cutting:
John Warehouse 1 1 0
As the tasks / capabilities required are different per department you would see something different if you would have user Jane that works in accounting
Is there anyone that can give me some hints so that I can get any further??
For the moment I have 3 tables:
1. Employee information - John, Jane 2. Departments - Warehouse, Accounting 3. Department tasks - Department, Cap1, Cap2, Cap3, Cap4
My name is Paul and I am new to this Forum, so I firstly wanted to say hello to all and glad to be here.
I need some assistance with a work related database. I am currently developing it as a project but have run into a wall with the design being my first time.
I have to create a customer service and invoicing database. I currently have the following tables:
Client (Customer No, User Profile, Password, Customer Name, Acc No, Policyholder, 100% Indemnity)
Contact (Acc No, Date Signed On, Company Name, Contact Name, Address 1, Address 2, Address 3, Address 4, Address 5, Post Code, Telephone No, Fax No, Email)
I have managed to link Client and contact no problems at all. I have also managed to link Client to Product using the table Client / Price. I have tested this with queries and can get all of the data I need extracted out.
However the problem occurrs when I try and link the Usage table to something or other. The Usage table is data that I need to import on a monthly basis from Excel. Once I get it, I need to load it into Access and then generate usage statements for each of the clients to show what products they have ordered and how much each report has cost them.
To make matters worse, each client has 14 different products to choose from, and all clients have different prices for each of the different products.
Getting this to connect properly is an absolute nightmare.
Can anyone assist me in how I might link the Usage (imported table) to the rest of the database? I have attached a copy of the relationships on a word document and wonder if anyone can put a finger on what I might be doing wrong.
I want to design a database for an educational instution environment. My problem is knowing what tables to create and how to link them. I know for example that an instructor can teach more than 1 course and a course can be taught by more than 1 Instructor. This makes it a many to many relationship which is not remommended. I know that there has to be another table to bridge these 2 tables. I want to know what is a suitable name for this 3rd table and what example fields it should contain besides the the Keys form table 1 and 2?
Now here is the over all problem:some instructors teaches more than 1 subjectsome subjects are taught by more than 1 Instructorsome Classes are taught by more than 1 instructorsome instructors teach more than1 classSome classes do more than 1 subjectSome subjects are done by more than 1 ClassSome classes are done at more than 1 locationThis is what is needed:
To be able to enter student grades and attendances by classThe marks sheet should be entered in a subform displaying the full student names list for a particular class at a time.
2. To be able to display the marks and attendance of students as a class list.
The case table is the centre of the database and links to all the other information. I require: multiple clients per case, multiple invoices per case, multiple casecostings per invoice, and multiple expenses per case.
I have set up the tables to what i think is correct, but now find that when trying to link tblCase and tblExpenses, I am getting the error "Invalid field definition "ExpenseID" in definition of index or relationship". I think this may be something to do with my keys, but can't seem to figure out a way around.
I've attached my DB, if anybody could take a quick look at it and tell me where i'm going wrong i would be eternally grateful. Thanks guys.
Hi, I would like to get your advice on my table setup and relationships for this payroll project. The company is an engineering company with Projects (or construction sites) around the world.
The 'Candidates' are current or potential employees and contractors. There are three main pay categories:
1.Shift-workers All shift workers doing a particular job on a particular project are paid the same rates e.g. all welders on a particular project or site in England are paid the same as each other. For that reason I want to link the pay rates with the job description for these workers. This avoides creating 50 records for 50 welders on the site in England to say that they make £10 an hour normal time (or whatever it is) etc.
2. Contract Contract workers usually get paid a flat rate per hour. As these are negociated on an individual basis I would need to have this information linked to each individuals job (M_CandidateJobDetails).
3. Salary Again this information needs to be input for each individuals job.
For the contract and salary people the pay frequency can vary (weekly, bi-weekly or monthly). So can the currency they are paid in. I haven't got as far as the currency issue yet.
The reason for the one-to-many relationship between M_JobClassifaction and M_CandidateJobDetails is that many candidates can have the same type of job e.g. there can be many employees that in the job classifaction of 'Electrician'. For many of the jobs at managerial level e.g. 'site manager' there will only be one.
I will have a table with the hours worked by each person per week. I can use this for those on shift work or contract to calculate what they will be paid.
One of the main reasons for this database is so that the company can print reports to see what is paid out in payroll for each site and in total (in euros). These will be gross figures and I don't need to take expenses, vacations, bonuses or taxes into account. They other thing we will need to be able to do is assign candidates to vacant positions and change them from one position to another - possibly between different projects.
So basically does anyone have any comments on the relationships, normalisation or anything else. Is this the best way to do it?
Hi, I am new to this post. I am a physician with interest in database designing. I have been trying to design a database for my clinic for few months but am unable to make one. I have been searching/ reading alot of info and came across this thread. Maybe someone can help me. Actually, I want to make a database regarding ultrsound scan examinations of patients. I have five tables. 1. Patients. (patinetid*, patientname, age, sex, address, contact no) 2. Physicians. (physicianid*, physicianname, speciality, address, contact no) 3. Scans. (Scanid*, scanname, charges) 4. Scan orders.(scanorderid*, patientid*, physicianid, scanordernumber, scandiscount, totalcharges) 5. Scanorder details.(scanorderdetailid*, scanorderid, scanid, charges, discount)
I want to have primary key for scanordernumber which wil be the patient number and should this be placed in patient table?? All the ids have been linked with one to many reltionships. Actually I am unable to set proper relationship. So when the patient arrives he is registered with a unique number, a physian name with date added and scan ordered is entered. Sum calculated. I have done the later part with the form all designed but the relationships and primary key are all messed up.
I can post an image of relationships or blank database.
My db is split into front-end and back-end. In the f-e's Relationships schematic, I can see the relationships as they were defined at the time when the db was split, complete with the one-to-many symbology.
I can add a new table to the b-e and set its relationship as one-to-many, enforcing referential integrity and cascading as I wish - and the schematic (in the b-e) reflects that.
In the f-e, I can then use the <Get External Data - Access Database> function to link to the new table, and I can add the new table to the relationships diagram in the f-e. I can also drag and drop to link primary and foreign keys (within the f-e), but cannot select one-to-many. I'm OK with that, as I understand that the relationship is within the b-e, and this is just a diagrammatic representation.
But I can see the one-to-many relationships between the tables which existed when the db was split, and I would like to be able to see the new table's relationships in a consistent fashion. Updating the linked tables via the Linked Table Manager does not do the trick.
Surely I don't have to split the database again in order to achieve a consistent diagram - do I ?
I need to redesign a database to include more complex relationships between 3 variables non of which are mutually exclusive.These are my 3 tables/fields. Each field is unique in its table.
There is no clear relationship between the variables - ie they can all be 1 to 1 or 1 to many or do not have to exist at all. So I realise now (after 14 years of working with this data), that I need to have what I would think of as holding tables between the primary tables that hold combinations of the variables. Do I do this in one table that holds all 3 variables in non-repeating combinations (although this would need to allow nulls) or do I do it in 3 separate holding tables?
Hi all. I really need help with this. Does anyone see a problem with my relationships , i have attached a copy. Any help will be greatly appreciated ClaireB
I am new to database design and curious about relationships. In a hypothetical situation, if I have four tables: tblProducts, tblOrders, tblEmployees, and tblCustomers, how could the relationship be set up?
The Products are stored to keep track of the quantity on hand and the employees will also need to be tracked as to how many products they sell. Customers are recorded and Orders wrap up all three tables with the fields: OrderID, ProductID, EmployeeID, and CustomerID.
Would it make sense to say that many products can be bought by many customers and/or many employees can place many orders.
I've selected a number of tables to the relationship window. When I drag the primary key on one table to the corresponding foreign key on another table, the link created is one-to-one. I want one-to-many. Why did it create one-to-one? How do I change this to one-to-many?
Hi all. I am new to the use of access and have been told that I need to create a one-to-many relationship to be able to have several records from a drop down list saved to one unique number (my primary key).
Is this correct and if so how do I do this? If it is not correct what is the best way to do what I require?
I have created two tables which are linked with a one-to-many relationship
Using a form the user enters a date. Then in VB I add a value to the date and store this in the second table.
I have simplified this to try to find out what was going wrong and found that when the database adds a value to the second table which only has two fields it first of all adds it to the begining of the record set and the id field does not update to that of the first table where the relationship is joined.
Do I just captutre the value of the id field and add this to the recordset. How to I get the database to look foir the end of record set before I appent the new generated record.
I have looked for this on the help section; however, it does not seem to be covered. How would you change a one-to-many relationship to one-to-one? Access seems to automatically guess that the many side is where the foreign key.
Can it be changed from Access or is entirely on how you design your tables?
Hi !! I am doing a school project on a school database. In my DB I have a table with all students records (eg. Student ID, Name, Surname, DOB, class etc) and I have another table where the student fees payment slips will be printed. The fee table will only have the ID, name, surname and class fields and fee will be input for every student for every term.
I want the fee table to get all the info except the fee from the first table automatically when I give a student ID.
I have created a one to many with only Student ID fields linked, NOTHING.
Then I tried to link many fields on each side (eg Name to Name, Surname to Surname etc) but I got a msg "No unique index found for the referenced field in the primary table"
would having a db with several tables and NOT setting any relationships up in the relationships window affect the db in any way?
i have such a db, which originally had all the relationships set etc. however, as i encountered errors and had to replace tables and delete entries, i must have at some point deleted all the relationships.
i just relaised that the db now has no relatioships set up (all the primary keys are still in the tables) so i'm wondering if this matters?
If I have a table "tblContinents" with just two fields ContinentID and Continent and I have another table called "tblCountries" with three fields CountryID, Country and Continent.
After reading several articles, i decided not to make the Continent field in the tblCountries as a lookup field but rather I will do that at form level via a combo box. In such situation, since i am not creating a lookup field at table level, do you think that it is necessary to create the relationship between the two tables in the "relationship window", or shall i just leave it as it is, and if the need arises i will create such "relationships" in queries?
hi, im new here and i dont really know much about databases with access. im currently doing an assignment at school requiring me to do a entity relationship diagram for all my tables, which i do not know how to do. Can anyone please assist me asap? thank you very much in advance
below is the link where i uploaded it because it was too big to be uploaded onto this post. :)
I want the one-to-many relationship to be based on my own generated quote reference rather than the PK/FK.
My quote reference looks something like this IN123/10
Does the character '/' cause a problem with creating the relationship as I get the error message "No unique index found" even though I know that they exist?
