When To Split Into Multiple Tables?
Aug 31, 2007
How do I know when I should split a db into multiple tables? Right now- everything is in one table. Is there a rule of thumb or method to determine when I should split it up?
For example- MY DB is running queries on properties for sale. Would I split all the Active, Sold, Expired, Off Market listings into separate tables, since I will be frequently queriing based off of the status of the property? ie- I'll be running avg prices of homes that are in each of these status. If that's the case, how do I know what relationship to give it/how to set it up (use the MLS # as the primary key in each, or do I need a foreign key or something else?)
Is there a general rule of thumb, or guide to use when designing a db?
THANKS!
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Jan 15, 2014
I have a CSV file that the system is producing; it is one file with multiple sections in it eg...
Quote:
[Names]
001,"John Doe"
002,"Jane Doe"
003,"An Other"
[Address]
001,"63 Huntly Street","CRANMORE","BA4 7HA"
002,"52 Southern Way","NORTH QUEENSFERRY","KY11 3YZ"
003,"20 Scrimshire Lane","ASKETT","HP27 2AS"
[Orders]
001,"0001A","Screwdiver",1,8.99
001,"0001A","hammer",1,15
001,"0001A","no 3 screws",1,5
001,"0001A","drill",1,49.99
etc etc etc
The file is huge with many sections (eg Names, Address) in it. What I need to do is load it into Access for some analysis.Is there a way I can split the file one loading to the system into multiple tables?
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Oct 12, 2005
I have created an Access 2000 Db, and have gone through the motions of splitting the Db via the Splitting Tool. Since I have done this split, I have added forms, queries, and reports to the Front End. I have left the Back end table structures alone.
This is where my problem comes into play. To enter data into the Db, I use the forms. After splitting the Db, I assumed that the data would be stored in the tables in the BE. An issue had just presented itself and I went into the BE table structure to add a field to a couple of the tables, and when I opened the BE table in the datasheet view, I noticed that there were no records. I then became curious because when I run my reports and queries, the information is present. So I opened the FE tables and what do you know, all the data I have input since the split is housed in the FE tables.
I already attempted to Update the Table Links, but that did not solve the problem, and the data is still in the FE.
Can someone, anyone please help or offer some suggestions on how to resolve this dilemna.
Thank you in advance,
DtF
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Nov 28, 2012
I have access that is required to be accessed by multiple users and register their activities which is reflected with the tables in the background and form sends also the time that they are putting their activities.
So i split the tables and put them in a share folder in one of the PCs. however, the problem is about the timing and dates is not correct usually, and i found out some of the PCs their dates are not on sync. I asked and found out sometimes it is required to change the timing in their PCs.
Therefore, i was wondering instead of fetching the timing from their PCs why not to put the timing of share PC (i.e. timing/Date of the share PC which has the splitted tables)
so can i do like this:
User PC: (Form1) & user activity => Share PC: (Split table) & take time of the share
How can i do that?!
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Mar 14, 2013
I have a client who has data like this in an access table:
itemID
itemName
itemQuantity
1
Corvette
1
2
Mustang
2
3
Camaro
5
He wants to append the data to another table so it looks like this:
itemID
itemName
itemQuantity
1
Corvette
1
2
Mustang
1
2
Mustang
1
3
Camaro
1
[code]....
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Mar 10, 2013
I have an access form that is used for cash-ups. The cash-ups are not done on a regular basis and the owner requested that the database look at the last cash-up date, current cash-up date and calculate the difference in days and then calculate the average take per day by dividing the total take for the period by the number of days from the last cash-up date to the current cash-up date. This was simple and is done however, what he now wants is to export this data to another table and have it split the total amount per record by the average number of days and reflect the average amount per day over as many lines.
Eg: R5,000.00 / 20 days = R250.00 per day.
This data needs to be displayed in TWENTY lines each with a value of R250.00.
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Oct 27, 2014
My boss made a satisfaction database that tracks satisfaction in 2 ways, so we have:
Table
ID
SatisfactionAType
SatisfactionAScore
SatisfactionBType
SatisfactionBScore
I'd like to make a query that would split these into two lines, one for A, one for B and then export it to excel.
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Apr 30, 2014
I have a split form with 10-15 fields. Each of these fields is a combo box. The trouble I am having is sorting the data in the datasheet of the split for. I want to sort ascending by "ProductTypeName", then ascending by "Parent SKU" and then ascending by "ProductSizeID".
How can I do this when each of my combo boxes have an ID and then a name? Example below:
ProductTypeID
ProductTypeName
1
Apron - Bib
2
Apron - Waist
3
Bag - Backpack
4
Chef Coat
[Code] ......
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Feb 20, 2015
I had a list of 1800 full addresses including Postcode on excel, I added 2 columns for Co-ordinates then one column that I use to input data when a call needs removing. I then imported to access table and started to use queries to sort our sales into territories of hopefully no more than 26 calls each, I used the spare column to input a R for removed then only list null entries in queries then I keep adding postcodes in the postcode criteria column until I get around 26 per Query.
My Ultimate goal is to Build multiple Tables of no more than 26 calls that I can geocode onto maps, to make it easier and more cost effective for our sales team.
My Problems are. How do I Prevent Duplicates when entering addresses if new address are entered, I Currently have access creating its own KeyI need to be able to track & prevent duplicate postcodes being assigned to more than one query/Territory table.I need either Access to either Produce a Table Report (As in excel) or might be easier if I just import my data back to excel table.
I kind of think I need new tables for Maps with relationships created between Map table and Territory table. but not sure if this is the best way to go or not.
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Sep 20, 2013
I have a split database with the backend on our server. When I go to my server and look at all the open files on the network everyone who is in the backend shows up twice. One has zero locks and the other has multiple locks.
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Mar 8, 2015
how to split this , I am new Access DB, I worked in Sql Server but access new to me
I have the below data
Appid Names
100 John,Bob,Kondya, Lima
200 Shor,James,Kim
300 Cinem
I want to convert to
Appid Names Name1 Name2 Name3 Name4
100 John Bob Kondya Lima NULL
200 Shor James Kim NULL NULL
300 Cinem NULL NULL NULL Null
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Jul 22, 2013
I am trying to split a number sequence (Ex. 25372-400-E10-0000-D0021) Where the third number in the sequence can be either 2 or 3 numbers/letters.
The idea is to have a query that will split this number into its individual parts. I have seen several forums about splitting two numbers and such but I can't seem to make that work when I need to create 5 columns from this one field.
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Sep 3, 2013
I have an access table that looks like the below:
"field1", "field2, field3, field4, field5, field6, field7"
"field1~field2~field3~field4~field5~field6~fie ld7"
"field1~field2~field3~field4~field5~field6~fie ld7"
"field1~field2~field3~field4~field5~field6~fie ld7"
"field1", "field2, field3, field4, field5, field6, field7"
"field1~field2~field3~field4~field5~field6~fie ld7"
I've got a module which loads the data into a table, but it can't handle the records that are ~ delimited, so spits them out as a single field.
I know there is some VBA code that can be used to split comma delimited records, and I've seen bits of it floating around online and tried to alter it to work for the ~, but I get the feeling that what I've seen is only a part of the required code, how to put it all together to make something that actually works.
So, what I need to do is;
- Split some records in a table out into multiple fields where there is a ~ present
- Place these newly split fields into a table (I don't mind if it ends up in a new table or not)
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Jun 21, 2014
I'm working on a database with a form input to record my time on projects at work. How to split End Time - Start Time among all brands that I've chosen for a line item?
[URL] .....
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Jul 1, 2013
I have an Access Database and I want to split up one column into multiple columns. The one column has multiple rows that relate to one person, so for instance I have the following:I am taking information from both tables and I want to create a query but I need to separate out the mother, father, and guardian with the names attached
So from the Child table :
Joe Smith Address Phone
The query that I created is from two tables, the child table and the family table: ( I used the dashes just for it to be easier to read)
------Child Table/PrimaryKey --------Family Table---------------------
First Name--- Last Name--- First Name--- Last Name--- Relationship
Joe ----------------Smith ----------Jane --------Doe-------------Mother
Joe ----------------Smith ----------John---------Smith---------- Father
So in this scenario I need to get the name of the second parent in another column....meaning have all the parents appear on the same line for this child, and each child there after..
So I need it to look like this:
------Child Table/PrimaryKey --------Family Table---------------------
First Name------ Last Name------ First Name------ Last Name------ Relationship------ 2First Name------2Last Name------2Relationship
Joe----------------Smith------------ Jane-------------- Doe------------- Mother-----------John---------------- Smith------------ Father
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May 7, 2014
I'm a new to Access, SQL. I need the following output:
Input:
PHP Code:
PO Vendor State
a, b 1,2 IL
c, d, e 3 TX
f 5 CA
Output:
PHP Code:
PO Vendor State
a 1,2 IL
b 1,2 IL
c 3 TX
d 3 TX
e 3 TX
f 5 CA
I found the following SQL code from another forum, which splits entries in a cell separated by commas into 2 rows, output being:
PHP Code:
PO Vendor State
a 1,2 IL
b 1,2 IL
c 3 TX
d,e 3 TX
f 5 CA
SELECT * INTO ImportedData
FROM (
SELECT PO, Vendor, State
FROM SourceData
[Code] ....
How to run a loop so that if a cell has n entries separated by commas, I want them to be split into 'n' number of rows.
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Dec 17, 2012
I have two separate database files, a front end with all my forms and a back end with all my tables. The backend is stored on a network drive, is there any way of being able to store the frontend on the drive with the backend? Users do not use the actual computer to store information or access files, everything is usually saved on the network drive. I have created a shortcut that launches the front end database in the read only kiosk mode.
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Jan 30, 2015
How to correct the issue below. I created a split form and I have 2 combo boxes that allow multiple selections. The one combo box for LOB (line of business) works perfect and does not create duplicate records in the datasheet view of the split form. The 2nd combo box with multiple selections creates duplicate records in the datasheet depending on how many selections are made.
I have checked this in the underlying table and there are no duplicate records, it is only in the split form datasheet. I have checked settings and configuration between the 2 combo boxes that are reacting differently and they appear to be identical...
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Oct 11, 2005
Im trying to add 2 new tables to a split and linked database... but no matter which side i add the table to (BE or FE), it wont show up in the linked table manager.. so my question is 1.) is there some trick to getting it to show up in the link manager? or 2.) is there some way to re-merge the database, add the new tables.. and then split it again?
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Oct 12, 2004
This has to be a common problem.
I have an environment where I have two databases. One holding tables (The Data) and one holding everything else "The Programs" (Forms, Queries etc)
When the application gets enhanced I currently have no problem updating "The Programs" since I can just copy the new MDB on top of the old MDB.
This is not the case with "The Data", if I need to change any of the tables (since they contain live data, that is modified all the time) I have to physically connect to the machine holding the Data.MDB and modify the tables. The problem is there are getting to be many locations where these changes need to be made.
Is there any way to update the tables from a script (I used to use SQL to update remote tables in a mainframe world)
Thanks
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Apr 8, 2015
I'm working on recreating my church's records in access and was originally wanting to take people from the Visitors table and automatically move the to the Members Table (and same with Deceased & Moved), but after some searching found that's not really do able. So now my question is, can I have a master table that has everybody (visitors/members/deceased/moved) and then split that into different tables while keeping the main table (that way I can go into the main table and reassign the person)?
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Aug 18, 2014
So i split my database into a front and back end, now i wanted to add a table to the database. I created the table in the backend but im not sure how to make it appear in the front end. Im using access 2010. I tried the link table manager but the table i created dosent appear there.
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Nov 29, 2007
Can a Append Query move all my data stored in multiple tables to another database with a identical table structure?
Because as I try to work the query, I keep getting prompted to "Select a table" I want to append to, and I don't want to append to just one table...
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May 6, 2014
I have split the database I have created via the splitter-wizard and found that all tables with auto-numbers have re-set back to 1.
How do I get around this problem - I have tried running an append query but it flags up an error message. For certain functions to work in the database I need to set autonumbers at different amounts .
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Nov 21, 2013
I have an Access 2007 file that is 'split' so the tables are centrally stored on the server.
How do I update one the linked tables stored in the back-end file with a table from another Access file?
If I import the 'new' table it is not 'linked' - it is embedded with the Access file I am working on.
What is the correct way of doing this without corrupting the data?
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Jul 3, 2014
I have a column that's called "Date" which stores values for begining to end date as 'Text' like: 070314-073114 So I need to split it to 2 columns that has the Start Date as 070314 and End Date as 073114?
This database is still in Microsoft Access, and eventually after cleaning it up, we will move it to SQL Server.
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