How Do I Structure My Tables?
Apr 21, 2005
I don’t understand how to structure tables and relationships.
I want to build a form that allows the user to search for a postal service from a group of carriers.
User must be able to input into a form:
Weight in g, Kg or lbs
Insurance level required
Whether signature is required (Yes/No from drop down list)
Collection/drop-off options (tick boxes)
Each service has a different insurance level, some need signature; some services collect, and all have different rates.
I just want to know how to structure the database.
The main part of my question is what would be my main table be and what fields would be contained in it, and what foreign keys would be introduced to pull in info.
Would you have a different table for each service?
View Replies
ADVERTISEMENT
Jul 8, 2013
I need to combine two tables that have identical structure to one table. Different people have used them to insert data from different parts of our project. I have tried to find information about how to do this but so far with little luck.
View 13 Replies
View Related
May 8, 2006
If i make minor changes in the backend db structure (eg add a feild, change properties of a feild in a table,). These changes are not reflected in the frontend. how can thses changes be reflected in the frontend usig the simpest method.
View 2 Replies
View Related
Feb 9, 2005
I am creating a database where the user can import data from a number of spreadsheets (one spreadsheet for each company). Currently I have one table for each company with the year being the primary key. Each year when a rolled over spreadsheet needs to be generated for a certain company I have Access import the data to a blank template in excel which will display the prior 4 years of data (for informational purposes) and leave a column blank for the end user to fill in the current year data. When returned the current year data is imported into the database.
My problem is that I cannot see a way to do this without having a seperate table for each company. If I have one table with all company data I cannot use the year as the primary key. Any suggestions on how I can reduce the amount of tables I need. Setting up the rest of the tables wont be a problem, but future users of the database will have to go through the process of creating tables for new companies and creating all the queries and macros associated with that table.
View 2 Replies
View Related
Dec 24, 2013
I have a table where in 286 different fields have to be updated by the users. ( Nature of project And i have 10 fields which are coming as a input from another table, so i use Append and Update query to add the new datas and update the datas in case of any changes in the input from another table. ( to avoid manual corrections)
Now coming to my real problem, all the 286 fields have to be updated by the user's are check box type, now what is the solution since access will not accept more than 255 fields?
View 4 Replies
View Related
Aug 2, 2005
How can I add an additional field to a table based on the output of a query? For example, I have table A with 2 types of records and table B with only 1 type of record. Based on this, I can determine which records in table A are the same type as those in table B. I would however like to be able to flag within table A, those records in table A that are the same as those in table B.
View 1 Replies
View Related
Oct 31, 2005
Firstly, I want to admit that my knowledge about data base construction is fairly basic.
I am trying to build a data base for humanitarian projects that do not at all resemple of the usual examples including customers, invoices, suppliers and what have you. My problem in constructing the DB is that most of the projects will address more than one subject and also include more than one target group and even operate in more than one country.
In my first attempt I filled the relevant fields (subjects, target groups and country) with more than one value using a form with multi select lists. The problem was that it was very difficult to query these multi-value fields and kind people in this forum strongly advised my to reconstruct the DB avoiding such fields.
What I need is to be able to view/print various selections based on precise criteria that include a region (or country), a subject and a target group in all kind of combinations.
The problem is to decide on what tables to establish and their interrelation. I guess that when entering a project record (using a form) I will have to store somewhere what subjects (could be more than five) and target groups the project include. It is, of course, not a problem to establish special tables or value lists for the subjects and target groups and countries, but where/how do I store the basic project information for a project and the multi-values that are related to the individual project?
I hope that this is not too confusing and I would appreciate any suggestion for a simple table structure and the interrelation between the tables.
Many thanks in advance.
Niels
View 1 Replies
View Related
Oct 1, 2006
I want to add 3 new fields to the structure of around 80 tables (all with identical structures). Is there a way to automate this process?
Paul.
View 8 Replies
View Related
Apr 2, 2015
I have been working on a a table design, but I am failing to create the correct relationships.My main table is the tblIncident with the three remaining tables being linked via a one to many relationship. I am using an auto number as my primary key, then linking that number to a FK in each table.
The end goal is to create one form with a varying sample of combo boxes, check boxes and data entry fields from each table. I did not plan to create a subform for each table, but maybe that is required?
View 3 Replies
View Related
Nov 8, 2014
I am starting out creating a training database to track training needs and expiring training etc.I'm just looking for some tips as to how to structure the tables and relationships..I have an employee table, department table and training type table.However im wondering how i can set up requirments and then match these to check if the person is trained up to date on all required skills?
View 2 Replies
View Related
Apr 12, 2013
I'm creating a timesheet/check in system (log in when the person starts work so it logs it and when they log out it logs that also for the manager or someone with high power to see.) for a fictitious scenario for an IT major project but I'm not sure where to start!
At the moment I have a few tables that are like this.
Table: Employees
Fields: EmployeeID, First Name, Last Name, DOB
Table: PayRates
Fields: RateID, EmployeeID, HourRate, TotalHours
Table:WorkTimes
Fields: EmployeeID, PayPeriod, WorkDate, StartTime, EndTime, TotalHours
I'm not entirely sure if this is all correctly structured, it just doesn't look/sound right to me.
View 1 Replies
View Related
Sep 8, 2011
I have a psychology project where we soon use a questionnaire on a daily basis (maybe 80 variables per day per subject). Currently, there is no data in the database.
I've managed to create a table called day1 (with 80 day1 variables) and a form that looks like the questionnaire we want to use (and linked apropriately to the variables in the table for day1).
What is an easy way of duplicating the table and form for successive days? That is, i want the structure of the day1 table copied to another table (call it day2). It has exactly the same variables except they are slightly different to differentiate them from day1. I would like the form for day2 to have exactly the same layout as the form for day1, but link to the variables in table 2.
I know i could just couple the day1 table, change the variable names slightly, and then copy the form for day1 and change the links to point to table2, but there are many assessments (18 days).
View 3 Replies
View Related
Mar 4, 2014
I haven't been on Access for a while so im still in the process of getting the cogs turning....... i am trying to design a database structure for controllers and heating.
each controller can have many heating units
each heating unit can use many controllers
rather than code everything, how could i set this up?
Example:
Controller01 can be used with Boiler01, Boiler04, Boiler12, Boiler 20
Controller02 can be used with Boiler01, Boiler05, Boiler15
Controller03 can be used with Boiler02, Boiler03, Boiler04, Boiler20
I have a table with a ControllerID and a table with a BoilerID. In the boiler table, i have the ControllerID and a one to many relationship.
How would I set this up?
View 1 Replies
View Related
Jul 19, 2014
I need a table structure that will allow me to have a repair log data entry form with 3 cascading combo boxes on the repair log data entry form. There can be many repairs for a specific job but most of the time there will be one repair per job and 1% of the time two or more repairs for a specific job.
I am pulling a report based on a query that will show the repaired location, facility type, repaired item, repaired component on that item and other details related to the repair.I uploaded an empty database with the structure.
Cascade levels
I. Facility Type
II. Item by [I]
III. Component by [II]
View 14 Replies
View Related
Jan 8, 2013
I need to modify my customer table to cater for multiple names at one address.
Should I move all the addresses into their own separate table or leave them as is (name-Address-postcode- email etc in one table) and put the additional addressees into a separate table or is there a better way I have not thought of.
View 6 Replies
View Related
Aug 17, 2015
Looking for efficient table structure for this. Let's say I have a list of contractors who will get paid a certain amount of money each week. The amount of money changes each week by measuring the amount of work done, giving it a price and calculating it. The fields are these:
[pk]WeeklyWorkID
WorkID
Quantity
UnitPrice
Total=Qty*UnitPrice (not stored in this table)
EmployeeID
WeekID
So far, it's all good, but we wish to pay the contractors in an unusual way. Let's say he makes $16,000 of work this week, and we want to pay him using cash AND/OR either one or multiple debit cards. For example:
Cash: $1,500
Debit card 45: $7,500
Debit card 71: $4,000
Debit card 13: $3,000
Total = $ 16,000
We can only deposit $7,500 max in each card. But it's even worse... two or more contractors can SHARE the card and it's not always the same card. Sounds pretty funky, but it's what the company wants to do. So, what would you recommend me in this case?
I'm guessing I'm gonna need these tables: tbWeeks to hold the week number, tbCards to store the cards' info, and an extra table to make a many to many relationship between the cards and the employees.
View 2 Replies
View Related
Feb 28, 2013
I am developing a claim tracking database that tracks dates of events that occur in the course of processing a claim; such as, Loss Date, Report Date, Estimate Date, Payment Date, etc.
I currently have the following tables set up:
tblClaim
ClaimID
ClaimNumber
tblEvents
EventID
EventName
tblClaimEvents
ClaimEventID
fkClaimID
fkEventID
EventDate
With this table structure there is a many-to-many relationship between Claims and Events, but, there will only be one of each event per claim. Is there a better way to set up the tables to enforce a 1-to-1 relationship?
I was planning on creating a form for the Claim table with a subform for the Events joined on ClaimID and fkClaimID, but that would allow users to create more than one set of Events per claim, if that makes sense.
View 4 Replies
View Related
Jun 1, 2005
Hope the thread title wasn't too confusing.
I have a database that tracks emissions from painting. Bear with me since this is going to be a long post.
:o
Some background info.
- a paint can consists of many parts mixed in a specific ratio.
- a part cosists of many chemicals
- a part may be used is many different paints
Here is how I have the existing database structured now. I’ve simplified it somewhat.
tblPaint
PaintID (PK)
PaintName - String
PaintDensity - Double
PaintVOCContent - Double
tblPart
PartID (PK)
PartName - String
PartDensity - Double
PartVOCContent - Double
tblRatio
RatioID (PK)
PaintID (FK)
PartID (FK)
Ratio - Integer
tblChemicalWt
ChemicalWtID (PK)
PartID (FK)
ChemicalID (FK)
WeightPercent - Double (Percent)
tblChemical
ChemicalID (PK)
strChemicalNumber - Long
strChemicalName - String
tblUsage
UsageID (PK)
PaintID (FK)
UsageDate - Date
UsageAmount - Double
PK = Primary Key (Autonumber)
FK = Foreign Key (Autonumber)
The Density or VOC Content (VOC = Volatile Organic Compound) for a paint can either be given OR it can be calculated by the mix ratio of parts and their respective Density or VOC Content values. One or the other must be complete.
What I did not account for was that there may be changes due to the paint manufacturer revising their paint composition, such as;
the parts that make up a paint may change
chemical make-up of a part changes (can be a change in Weight Percentages or the addition or deletion of a chemical).
ratio in which parts are mixed for a paint changes
Density/VOC Content values may change for a Paint or Part
The problem is that I cannot simply change the existing records as the emissions are calculated using all the data from each table and emissions need to be calculated using the paint/part/ratio/chemical weight percent info that was valid at the time of usage.
Another thing is that the Paint Name will not change, it’ll always be something like “BrandX Acrylic Blue”.
The person entering usage data only knows how much of what paint was used for a given day.
The person who enters paint usage has nothing to with entering the chemical make-up for parts and information for the paints and vice versa.
At any rate, my new draft table design is as follows. Two of the tables (tblChemical & tblUsage) will remain the same.
tblPaint
PaintID (PK)
PaintName - String
tblPaintVersion
PaintVersionID (PK)
PaintID (FK)
PaintDensity - Double
PaintVOCContent - Double
PaintVersionDateIN - Date
PaintVersionDateOUT - Date
tblPart
PartID (PK)
PartName - String
tblPartVersion
PartVersionID (PK)
PartID (FK)
PartDensity - Double
PartVOCContent - Double
PartVersionDateIN - Date
PartVersionDateOUT - Date
tblChemicalWt
ChemicalWtID (PK)
PartVersionID (FK)
ChemicalID (FK)
WeightPercent - Double (Percent)
I might be able to do away with tblRatioVersion and just have one table to store the mix ratios. It should be the case that a change in mix ratios (either a change in mix ratios and/or what parts make up a paint) means a change in the Paint Density & VOC Content. But I am presenting both versions of the Ratio tables here for completeness.
Version 1
tblRatioVersion
RatioVersionID (PK)
PaintVersionID (FK)
RatioVersionDateIN - Date
RatioVersionDateOUT - Date
tblRatio
RatioID (PK)
RatioVersionID (FK)
PartVersionID (FK)
Ratio - Integer
Version 2
tblRatio
RatioID (PK)
PaintVersionID (FK)
PartVersionID (FK)
RatioVersionDateIN - Date
RatioVersionDateOUT - Date
Ratio - Integer
I plan on having the DateOUT fields be populated automatically to match the DateIN for the new version. That way I can use “BETWEEN DateIN and DateOUT” to select the appropriate info for calculating emissions. The idea came from an old thread I started (http://www.access-programmers.co.uk/forums/showthread.php?t=31677&highlight=historical+data). I think this is the way to go, but with all the relationships going on, I'm having a hard time wrapping my head around it all. Am hoping someone here can help me with this.
Anyone see any problems with the new table design?
Anyone know a better way?
:confused:
Some potential issues that I see
If only the Density/VOC Content changes for a Paint, then the old set of records in tblRatio must be duplicated.
If only the Density/VOC Content changes for a Part, then the old set of records in tblRatio & tblChemicalWt must be duplicated.
Thanks for reading this post all the way to the end!
:D
EDIT: Thought about it some more.
A new version of a Part, should trigger a new version of Mix Ratios which in turn should trigger a new version of a paint.
Part --> Ratio --> Paint
Ratio --> Paint
Also, a change in a Part must trigger a New Paint version for ALL Paints that currently use it!
:eek:
View 3 Replies
View Related
Dec 7, 2005
I have a database to record documents received on a project. 2 main tables, documents and revisions, each document can have many revisions. I have now been asked to add a section in for actions against each revisions, that is each revision can have many actions. Am having problems understanding how to add this table. The current database has several hundred records already and I do not really want to re-enter. Can someone help.
TableDocument: counter(primarykey,autonumber), DocNumber, DocTitle
TableRevision: counter, revision, DateRec'd
View 2 Replies
View Related
Oct 27, 2005
Hi all,
I am on my way to building my first relational DB. Is anyone able to look at the attached sample and tell me if I am on the right track?
The DB is being desined to record Repair information carried out on a machine. (TblRepair)
The DB will also eventually record refurbished machines (TblRefurb) and also many other situations like stock control, etc.(yet to be designed). Before I go on I just want to check:
> Is this roughly correct so far?
> If I create a new record in the existing form, why can I not enter both UnitID and EmployeeID? Relationship conflict?
> Should I be building forms on a query? (I think the answer is Yes, just need confirmation).
> Is it because of a problem with the query I cannot enter details correctly? (as per the above question).
Any pointers would be very welcome. PS Sorry its v.old A97!
View 2 Replies
View Related
Dec 16, 2005
Hi all!
I have created a database with auto-archiving features. I have "working tables" that are populated when the product is moved to the correct process, in this case when it reaches the test department. When the product is moved out of the relevant process, the database runs several queries which archive the relevant data and deletes the records from the working table.
There are two working tables in the test department, one for test failures and one for rework activities. The question at hand is WHEN should I populate the working table for rework activities:
Option 1: Populate the table when the product moves to the relevant process. This will create and delete thousands of records from the working table every day. Using this method will cause my table to bloat to 50,000+ records that are constantly updated, appended, and deleted.
Option 2: Populate the table when (and IF) the product fails a test. This will keep the table to a much smaller size (around 2500 records) but requires the database to run several queries in the middle of the data entry process, significantly slowing my program.
So which is the faster/better process: Filtering a table of 50,000+ records or appending the working table when you need the data?
View 1 Replies
View Related
Feb 14, 2006
Is there any way to keep track of a database structure in access? For instance, which query relates to which report? Sometimes I create queries that are no longer needed but if there are a lot (which there are!) it can be easy to delete one that's needed.
View 5 Replies
View Related
Mar 5, 2006
I created a database to track tardies and absences of my employees. I would like to be able to sum the number of absences and tardies for each person per month and graph it.
Per our attendance policy, 6 tardies = 1 absence. I need to take the total number of tardies that month/6 and add to the total absences that month to equal the total attendance for the month.
I need help. Can you please view my database and give me some ideas?
Thanks,
Jason
View 1 Replies
View Related
Nov 6, 2006
Hi everyone
I would appreciate some help redesigning a database structure.
Currently the database has a table holding students personal details. Linked to this table with a one-to-many link is a table holding subject reports.
Also linked to the student table are two other tables holding prior attainment and mentoring details. These table are linked one-to-one.
Personally I believe the two tables linked with one-to-one links should be merged with the students table to become one single table holding student data.
Is this right?
View 3 Replies
View Related
Mar 22, 2007
I'm trying to find a way to export the structure of a table in my Access database.
I created a new table and I want to put it in the database on my website. However, my site is constantly being used so I have no way of downloading the database, modifying it, and then uploading it again without losing some data.
I do have a database editor on my website that allows me to run queries. So If I can get a query with all of the CREATE TABLE information (all the fields, whether they are Allow Zero Length, etc.) then I can just use that.
I can't seem to find a way in Access 2000 to export the structure of the table.
View 3 Replies
View Related
Jun 11, 2007
I have 2 tables.
1 tables cointains field_name
2 tables contains data
I want to create a query that I could use the field_name from table 1 (loop thru table1 )to see if the field_name exist in table 2
thanks
View 2 Replies
View Related
