Multi-field Index
Dec 29, 2005
I am trying to set a multiple field index on a table. I would like to use 3 fields. One is a text field, the other two are date fields. The text field and one date field will always have a value. The other date field can either have a value or no value. The index will work if I only use the text field and date field that always have values. If I try to add the third field, it will not find a duplicate record. Can I not include a field that may have a null value?
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Sep 24, 2014
I have a couple of tables which only have a single field. Is it worth adding a second field in order to hold an ID number (is this commonly termed an index number?) for each entry.
My other tables with multiple fields include a field for an ID number and these tables are linked via these fields.
At this stage I cannot see any reason why, in the future, I would want to add additional fields to the tables which I am currently planning to make single field.
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Aug 5, 2012
Add and Index named Location to the tblGuest table that consists of the StateProv and City fields and uses the default property settings, Delete the PostalCode Index, save then close the table.
I have looked up all info in the text reffering to Indexing and cant seem to come to a conclusion of the way to complete the underlined area area. For the class they provide you with the files and in this particular file the primekey is Guest ID with a field value of GuestID. There are two other Indexes PostalCode with field value PostalCode and GuestID with field value of GuestID.
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Mar 5, 2013
To prevent duplicate records, I use multiple fields indexes, which worked fine until now. I learned that each "empty" fields are consider unique by Access, so not the best in an index to prevent duplicate records. I managed to have it worked using the default value property to give each "empty" records the same value.
Now my problem is that I have a date field which is optional, but I need to use it as a unique identifier in an index. I could again use a default value, but since it has to be a date, I find it confusing. I would rather have a default value of "No date specified" or "-" or even better, "". Unfortunately none of those works with date fields.
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Apr 4, 2014
I have a situation where I have a report which I will generate to print our companies pricebook. I need an index/table of contents for customers to go to the page where a product is to look up prices. The problem is that we add and subtract products on a consistent basis.
So a new product will get added, but of course, to run alphabetically, there's no way to insert it, then renumber the pages for it to be easily found.to use a maketable query, which sorts all of the products alphabetically. Each time it is run, it will delete the previous table. I then need to have an autonumber field created to create my "page numbers". Yes, each time the pricebook is run, products can and will oftentimes get new page numbers.
So my thought is to have a macro run which creates the autonumber field to the table. This will then be the basis for the form, which will in turn utilize the "page number"/autonumber field to both serve as page numbers in the report. And of course, the table which is created each time will be the "table of contents".
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Apr 12, 2013
I am trying a to build a slot booking database in which users will be able to book slots (ranging from 1-30) on a particular day for a specific site (location).
When trying to build the relationship between slot in tbl_available and slot in tbl_appointment i get the following error "No unique index found for the referenced field of the primary table" the same error pops up when trying to build a relationship between site in tbl_available and site in tbl_appointment.
I need both relationships to be 1 to many.
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Oct 8, 2013
I am trying to create a one-to-many relationship between these two tables. I want to be able to access the 3 fields on the [Processors] table within reports based on [AllItems]. [AllItems] is a listing of account activity where the [AccountNumber] repeats. I have every field set as the "Primary Key" on [AllItems] as that is the only way to avoid importing duplicate data. I am getting the error: "no unique index found for the referenced field of the primary table"
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May 25, 2005
Found some great code, else where that perhaps someone else can use.
Each required fields tag property - change to required
Dim blnContinue As Boolean
Dim ctl As Control
blnContinue = True
For Each ctl In Me.Controls
If ctl.Tag = "Required" Then
If IsNull(ctl) Then
MsgBox "Required Information Missing", vbCritical + vbOKOnly + vbDefaultButton1, "You must fill in the x xx xxx xxxx fields"
Cancel = True
ctl.SetFocus
Exit For
End If
End If
Next ctl
Set ctl = Nothing
End Sub
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Aug 12, 2014
I have created a multivalue field based off of URL... I am getting my values from a different table from within the database. My issue is that I tried to create a default value for the lookup field but it made another selection within the lookup field.
Example:
Reference Table Values are:
Name 1
Name 2
Field referencing table with my defined default value:
Name 1
Name 2
Name 1
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Sep 7, 2007
I have spent the last couple of days trying to figure out how to make this work.
I have three tables.
tblIntakeMain
[IntakeMainID]
tblIncidentDetails
[IncidentdeatailsID]
tblPersonnel
[PersonnelID]
On the main form I use subforms to link tblIncidentDetails and tblPersonnel to tblIntakeMain. Both subforms can, and do, have many entries. This all works fine. What is not working is the search form I am using.
I am using Gromits most excellent Search Form. The problem is when I create a query, qSearch, to bring together the three tables I get a multiple records which makes the searches very confusing and near useless. Is there anyway around this? Is there something I am missing? Is there another search method I could use that would work in a similar way as Gromits? Please help before the Prozac runs out and I lose my mind--what little it left.
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Apr 10, 2008
Hi everyone. Apologies if this has come up before, but the search terms I've tried here and on google keep turning up the wrong information.
At work I manage a large database with many tables. It stores data for participants in a research study. Each table stores the data for a different test, so one participant may have multiple records. Primary keys for these tables are defined by a combination of the participant and date of test fields. (Everything is dependent upon a table that stores the static info for participants, so the database is normalized.)
I want to be able to make a table that lists target participants and dates, and then create a query that looks at this table and pulls all the available data from various tables for those individuals that was recorded within one year of the target dates.
I've successfully made queries that meet these criteria while pulling data from only one table. The problem I'm having is that when I try to pull from multiple tables, each with it's own date field that needs to be used as a criterion, I end up excluding almost all the data, because most of the target participants do not have all the requested data within the target dates.
I've tried being inclusive with my criteria (using ORs), but then I end up with tons of data that I don't want and I need to filter through it, which defeats the purpose of the query.
Any advice on handling this issue, or do I basically just need to create a separate query for each table?
I'm sorry if this is too vague, but it's illegal for me to upload any of my own dataset. I could probably come up with an example if it's helpful, though.
Thanks!
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Sep 7, 2006
I have a database... 1 table...40 fields..
I currently have a query set up as a basic a LIKE search for each field and I have to do 40 each time..
Is there a way of being able to do 1 query and have it search all 40 fields?
So my field headings are
Part No
Description
barcode..
Album name
Singer/Group
and so on...
I since some of the albums are compliations I require to search all the fields...
Any ideas?
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Feb 8, 2015
I have 4 fields in a table that when combined must be unique.I know you can setup multiple fields as a combined key, but I don't really need these to be the key (I will auto number a unique key). I just need to make sure the same combination of codes is not entered twice.Do I set this up as multiple key fields anyway?
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Jul 1, 2013
Every time I mentioned multi-value fields I get the same input, don't use them. So I am trying to replace this field with a junction table. This will have multiple records for each record in the original subform. The only problem is that the original subform is set to continuous view and now I get the error that "you can't view a form as a continuous form if it contains a subform".
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May 14, 2013
I have got a db and that has 10+ ref tables, and i need to show everything from those tables in one, and these tables includes Attachment field. I have tried union but did not work.
How can i achieve this?
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Oct 14, 2014
I created a field in access 2010 called OptionalSubjects . It is a multi value field where a user can select multiple values from the combo box, the selection are ID from a query. Now i want to limit the user to only two selection from the multiple values available and not less than two. So the field is either NULL or two selection only. How can I achieve this in validation rule or vba.
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Sep 2, 2014
I know many are opposed to multi-valued fields, but in this case it works out nicely for my purposes.. I pick a couple things from a table to put into a field in a separate table via multi-value lookup, and when I hit ok, nothing happens. Literally. Tried the enter button, tried a mess of different keyboard mashing, and nothing. URL....
Row Source:
SELECT [Cage Codes].[CageCode], [Cage Codes].[Company], [Cage Codes].[Division] FROM [Cage Codes] ORDER BY [CageCode];
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Mar 11, 2014
I'm having a big struggle with adding a multi-value lookup field to a table. I need to provide a long pick list of items (from a source table) but these items must not be output (in forms or reports) in alphabetical order, they need to remain in the order that they are in the source table.
Access wants to alphabetize the output even if a I add a number field to the source table and sort by that.
Is there any way I can persuade access to just give the selected items back in the same order as in the source table ?
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Sep 17, 2007
Morning all,
Quick question... I figured out how to make all the searching items work... individually. The problem is is that I want to be able to search with two fields at a time. For example, say i have mo, date, job, pay and i want to seach for the MO and JOB and query the results accordingly. I can't get it to do that. Would I have to make a large If statement? I'm not entirely sure. Also now my problem is that it won't execute my first if statement or I should say it ignores it all togeather. I know it executes the code in the order it is written. If someone could shed some light I would be much apprecative. As always here is the code and attached is the program. What I'm working on is in the query table.
I also would like to be able for it to say if the fields MO and JOB do not comeup witha result for a messege to display there is no result. Or if the field is null not to do anything. I tried doing that in some of my code to no success perhaps I did somthing wrong.
Have a great day!
Dim strSQL As String
Dim sqlStringWHERE As String
Dim strhead As String
Dim strJOIN As String
' strSQL = "SELECT * from Panel WHERE MO like " & Chr$(39) & "*" & Me.qMO & "*" & Chr$(39)
strJOIN = " AND "
strhead = "SELECT * from Panel "
If Len(Me.qMO & vbNullString) Then
sqlStringWHERE = "WHERE [MO] like " & Chr$(39) & "*" & Me.qMO & "*" & Chr$(39)
Else
sqlStringWHERE = "WHERE [MO] = " & Chr$(39) & Me.qMO & Chr$(39)
sqlStringWHERE = sqlStringWHERE & strJOIN
End If
If Len(Me.qCode & vbNullString) Then
If Len(sqlStringWHERE) = 0 Then
sqlStringWHERE = "WHERE "
End If
sqlStringWHERE = "WHERE [CODE] like " & Chr$(39) & "*" & Me.qCode & "*" & Chr$(39)
Else
sqlStringWHERE = "WHERE [CODE] = " & Chr$(39) & Me.qCode & Chr$(39)
sqlStringWHERE = sqlStringWHERE & strJOIN
End If
strSQL = strhead & sqlStringWHERE
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May 2, 2006
Hi.
I am using Access 97.
I have a problem with multi-conditional field showing or not.
Specifically:
I have 2 fields which can either be null, 0, or have a numeric value. These need to stay invisible to staff.
There are 2 other fields, also invisble in their properties setting, which need to become visible if both of the previous fields do not conain a value greater than or equal to 1.
Because these 4 fields are invisible by default, I put the following code in the settings for the 1st visible field in the form. I also tried it with when the form opens.
But it doesn't work or I get debug problems.
If (TOTAL___WAGE_RECORDS_E = 0) And (TOTAL___WAGE_RECORDS_E Is Null) And (TOTAL___WAGE_RECORDS_E_OS = 0) And (TOTAL___WAGE_RECORDS_E_OS Is Null) Then
Me!EMP_QUART_AFTER_EXIT_QUART.Visible = True
Me!EMP_QUART_AFTER_EXIT_QUART.Dropdown
End If
Please help.
Thanks!
Russ
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Jan 5, 2005
(I know I posted this question before, but I fear it may have gotten lost in a thread so I am starting a new one)
I have created a multi-field pkey with the ModelDescription and VersionNumber fields. I did it the way that didn't require code as I could not find any online and am not versed enough in VB to do it on my own. I just highlighted both the fields and pressed the "Key" button.
My question is linking the tables. Should I just join them via the ModelDescription field? It won't let me join on both fields. Is it going to matter which field (ModelDescription vs. VersionNumber) I use to join the tables? I've never run into the need to have a multi-field pkey before.
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Oct 20, 2013
So I have an event table with a muti value field with all the people on that event. This people field is look up column from my people table (so shows the name but stores the key).Anyhow what I now need to to do is record logs from the event for each person (from that muti value people field). I want ideally be prompted to enter the log data for each person, and show it related to the event it is for.
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Aug 21, 2013
I have a main form with multiple sub-forms (each a separate tab). Having imported the fields from the equivalent tables, none of the multi-value combo box fields on the sub-forms work as they do not show anything. I tried implementing one on the main form (to test) and it worked fine. What am I doing wrong with the sub-forms fields?
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Oct 7, 2013
How do you create a Multi-Value Field using a Combo Box on a form?
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Aug 16, 2014
I have a Job Plan form containing a selector that chooses a system number from another table. I want to (inside the same form) look in a third table that ties system numbers to equipment items (one system has multiple items of equipment) and generate a list box displaying those equipment items. I think I know how to do that bit.
I then want the user to be able to multi-select from the list and somehow to save those selections against the Job Plan number.Is the best way to do this to create a multi-value field in the Job Plan table and store them in there?
From what I read, the best way is to create a join table between Job Plans and Equipment Items, but I'm not quite sure how to connect the selected items in a list box to that - is there some sort of obvious way to do that?
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May 16, 2014
My Db has a master table with a two-field primary key.
I have a main form, based on a query that primarily grabs data from that table.
The form has a subform based on a table which is the "many" side of a one-to-many relationship with the master table. I'm having a problem adding individual records to the subform.
The subform is linked via Master/child fields to the main form, but only on one of the two fields comprising the PK. When I add a new record in the sub it does not pull the PK data to the FK fields in the sub table and I suspect it is because of only having one of them properly linked.
The subform relates to an annual certification process that we track with vendors. The sub-table is populated each year with the two FK values for all qualifying vendors in one go. If I then need to add a single certification record for a single vendor I want to have a button on the subform that will pull the values from the main form fields, and ask the user for the cert year.
I tried adding a new record in vba via
Code:
Private Sub btnAddSingleRec_Click()
Forms!frmMainForm!subfrmCurrentProcess.SetFocus
DoCmd.GoToRecord , , acNewRec
DoCmd.OpenQuery "qryAddSingleCert"
with the query being an Update query with the following in the Update To line and "Is Null" in criteria:
Forms!Mainform!PKField1
Forms!Mainform!PKField2
[Enter Cert Year]
This doesn't throw an error, but the Access warnings say I'm updating 0 Rows.
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