Indexing Queries
Dec 14, 2005
Hi folks!
I'm a new user and need a hand. I'm running a query with two tables joined. I have 4 columns: Name, Day of Week, Date, Start Time. I want to create a 5th column that will number each record: 1,2,3,4,etc. I've tried researching help with indexes and primary keys etc. The main reason that I want to do this is to match up the uniques value with another query. The other query is identical with the exception of stop time versus start time. Bottom line is I want to automate a schedule for people but I'm trying to deal with shifts that go from one day into the next and I need a common denominator.
Any help would be appreciated.
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Jan 2, 2014
I have a complex series of calculations to perform, and I have found the best way to achieve my end is to create new tables by the Make Table queries.
The trouble is I have many tables to create and the downstream tables refer to the previously created tables; I have recently discovered that queries perform much quicker if they are indexed (duplicates OK). I've looked at my tables created by the MakeTable queries, and they all seem not to be indexed.
How do I make them indexed automatically?
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Sep 5, 2005
I was told by an access programmer that since the total number of records that's going to be in the db is around a few thousand tops it would be a good idea to index everything as that would speed things up. Is this true?
thanks,
scratch
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Apr 4, 2007
Could anyone tell me about the pros and cons of Primary Key and Indexing?
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Oct 10, 2006
G'day,
I have a products table which contains products from 4 vendors. The records have the following fields "Vendor", "Vendor Part Number"," Description", "Unit" and "Price"
I have indexed same by Vendor Part Number and Description.
The vendor's describe the same product using different descriptions.
VENDOR ....DESCRIPTION................................... .........PART NUMBER
Acme........TEKS METAL HEX+SEAL 10X16MM 100 (PKT)..123456-01
Banner.......METAL TEKS 10X16 MM..............................93a-1234
If I search by part number the search is extremely fast.
However a search on the DESCRIPTION field looking for individual words say 'Like TEKS*' and 'Like METAL*' are very slow. Obviously the indexing on the description field is probable based on sorting the 1st character of the Description field by A-Z then the second character etc.
I am wondering is there a smart way of indexing the Description field at the point of importing or creation of the Products Table where I could identify all the records with say 'TEKS' or 'METAL' or '10X16' etc. By doing this the search should be a lot faster.
Has anyone done this or do you have a pointer to an article that covers this. (I did try the search function without a suitable result)
Thanks in advance
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Mar 21, 2008
In my table, I have a number field set to Index (dups OK). I have another field that I do not want to index but need "no dups." Any ideas?
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Apr 1, 2008
Indexing fields can dramatically improve efficiency by speeding up sorts and searchs. My database tracks mail sent on various mail dates to multiple customers with insurance policies that are assigned unique policy numbers. I've indexed the policy number.
Question 1: Is there value in indexing a mail date field which has duplicate values even for a given customer that has received multiple mailings?
Question2 : Should one index every field in every database ? Are there scenarios where one would choose not to index a fied ? If so, can someone provide an example ?
Thanks in advance for your assistance.
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Oct 23, 2006
Hello All
I have a field called MEMBERID
I wish to index the following so that all members in 2005 can be idexed A to Z and all members in 2006 can be indexed A to Z:
00125/05
At the moment, the last two digits that indicate the year of joining are ignored when sorted in a query, and they are all jumbled up. I have about two hundred antries for 2005, and 160 for 2006. What am I doing wrong?
Regards
Terence
London
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Dec 30, 2004
I have an Access 2000 customer database with a hidden unbound text field that feeds customer history notes into a Main Notes section. The problem I have is the order of notes after they are given a default time stamp. At the moment the first note in the main field is the oldest but I would like to arrange the notes so that the newest note is placed at the top of the field. Can this happen?
Below is the code I use for the Notes section, where Text_14508 is the unbound hidden text box and Details is the Main Notes section.
Thanx in advance
Private Sub Text_14508_AfterUpdate()
Me.Details = Me.Details & vbCrLf & Now() & vbCrLf & Me.Text_14508 & vbCrLf
Me.Text_14508 = ""
End Sub
Private Sub Open_Notes_Click()
Text_14508.Visible = True
End Sub
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Sep 20, 2007
I need an advice by indexing fields with low entropy.
I have some large tables with some columns that i use in selects, but they store only few vaues like (0 or 1) or ("R" or "N" or "F").
Somewhere i read, that fileds like these (with lov variety of values) do not need (or should not) to be indexed.
http://www.dbpd.com/vault/9801xtra.htm
Is this true also for access databases accessed via ODBC, or not?
Please give me an advice.
Marcel
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Mar 19, 2013
I would like to Create a database for indexing / organizing PDF documents. My Company currently use a 3rd party accounts program and we raise sales and purchases using numerical numbers ( but we can Jump to a new range of numbers within the program) for example if the purchase order numbers become simliar to the sales order numbers. But this 3rd party software does not let us scan documents into it hence the need for an alternative database.
For the data base I was thinking if only creating a index of the sales order numbers to start with. the first few question I have are.
1.) Should I Use the Autonumber as my first index column or should I replace it with our own sales order numbers in that column.
2.) is there a way to autopopulate the sales order numbers in a table for historical sales numbers.
3.) can you scan directly into Access
How to start planning the design off the database as I know this is almost the most important aspect of a database.
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Jan 1, 2014
Im trying to work on an db in Access 2007 that was migrated from Access 2003 (in fact its been migrated several times starting from Access 97). It executes and runs with no problems in both versions.
The problem is when trying to open some queries (not all) - Access is unable to open the query in design mode and gives me this error :
" is not a valid name. Make sure that it does not include invalid characters or punctuation and that it is not too long.
However, as I cant open it - I cant check it. Im pretty sure none of the fields have invalid characters (they do have spaces) and Im not sure how long is too long....
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Jul 18, 2013
I'm using Access 2003 and excel 2003.
We currently manually run 5 different queries then copy and paste this data into 5 separate tabs on 1 workbook, I'm trying to automate some of this process if possible.
I am trying to use the 'transferspreadsheet' action within a macro to run a query and post it into a template excel file, using this code:
Trasfer Type Export
Spreadsheet Type Excel 8-10
Table Name (query Name)
FIle Name (FIle location)
Has field names No
Range Blank
----
This does seem to work and puts the data on a new tab on the specified workbook.
However I have a few questions:
1. Can you specify which query gets put onto which tab in excel? The tabs have different fixed names.
2. Can you specify which Cell the data gets pasted into to? As each tab has a set of headers and titles which need to remain.i.e would need to get query 1 to start in cell A4.
3. How would you expand the above out so that it runs all 5 queries, would you just add in multiple transfer spreadsheet actions in the same macro?
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Dec 2, 2014
I have 3 cross tab queries that are completely identical with the exception of the field that they pivot. Each field is searching for the same values just in different columns, with the end goal being to get the sum of the values for each pivoted column. I'm wondering rather than having 3 almost identical queries is there a way to use a crosstab to sum the values from each of the three fields rather that having 3 queries which then have to be aggregated in a fourth?
QUERY1
Code:
TRANSFORM
IIf(Count(PT_LEVEL.UNIT) Is Null,0,Count(PT_LEVEL.UNIT)) AS CountOfUNIT
SELECT
PT_LEVEL.INF_YEAR,
PT_LEVEL.INF_MONTH,
PT_LEVEL.UNIT
[code]...
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Feb 24, 2015
I have a crosstab queries which uses the date query parameters. However, when I go to my Export command (code is below), it ask me to enter the date parameters (start date and end date) twice. What do I have to do so that the system will ask me to enter once only?
Code:
On Error GoTo Err_cmdTest_Click
'Must 1st set a Reference to the Microsoft Office XX.X Object Library
Dim dlgOpen As FileDialog
Dim strExportPath As String
Const conOBJECT_TO_EXPORT As String = "qryEXPORT"
[Code] .....
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Jul 31, 2013
I have 3 queries named Mech Final Equipment 3 Mth, Mech Final Equipment 6 Mth, and Mech Historical Final Equipment.They all have two fields-Final equipment and Sum of Sum of Down (calculating the number of minutes each piece of equipment was down in the time period selected).
My ultimate goal is to join the three queries to display a pivot chart that uses the Final Equipment as the category field and 3 Mth, 6Mth, and Historical as seperate data fields.What I have is a join query (Which I have named Mech Final Equipment H63 Joined)
Using this SQL:
Code:
SELECT DISTINCTROW [Mech Final Equipment 3 Mth].[Final Equipment], Sum([Mech Final Equipment 3 Mth].[Sum Of Down]) AS Duration
FROM [Mech Final Equipment 3 Mth]
GROUP BY [Mech Final Equipment 3 Mth].[Final Equipment]
UNION
[code]...
Which returns a table that looks like this:
Final Equipment, Duration
Ancillary Equipment, 225
Ancillary Equipment, 401
Ancillary Equipment, 1787
Brush Unit , 1252
Brush Unit , 2519
Brush Unit , 8004
And so on.What I need the table to look like is this
Final Equipment, 3 Mth, 6 Mth, Historical
Ancillary Equipment, 225, 401, 1787
Brush Unit, 1252, 2519, 8004
And so on, like a cross tab.I tried to do a crosstab query but I don't have enough fields.
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Jul 16, 2013
I have three Queries and I need to export three queries into one workbook but different worksheet,
Currently I am using ExportWithFormatting , but the result came out is three different workbook .
Is there any way I can export to one workbook ?
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Feb 18, 2014
I am trying to add calculations to queries based on columns in the query... it seems to randomly expect 'Expression' or 'Group by' as column types, and Im having to create 3 sets of queries following on from each other to de-dupe data and allow filters on calculated values.
Also I've got a function which turns a date into a quarterly cohort, e.g. Oct 2013 -> 20134. I use ot on a lot of dates. I created a VBA function, CohortQ used as follows in queries:
Cohort: IIf Year([InputDate]) < 1990 or Year([InputDate]) > 2020, 0 CohortQ([InputDate]))
In the VBA, InputDate is defined as a date
Code:
Function CohortQ(InputDate As Date) As Integer
If InputDate = 0 Then
CohortQ = 0
Exit Function
End If
[Code] .....
But when I run it on a date field, it gives me a data mismatch error. I can't step through as it's working on 600K rows.
If I put the function into the query,
Cohort: IIf Year([InputDate]) < 1990 or Year([InputDate]) > 2020, 0 Year([InputDate])*10+DatePart("q",[InputDate]))
it works.
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Jan 24, 2014
I have two queries, one base upon the other. I would like to combine them (If Possible) into one query so I can embed them into a form or report. I have tried without success at finding the answer on the forum as well as searching the web.
The table lists employee numbers and dates they worked. I need a count of how many employees worked each year, based upon the paycheck date, not the actual date worked. Pay check dates are two weeks apart. An extreme example, is the first pay check date of 2010 was on 1/1/2010, but all the days worked were in 2009, this would have to be included in 2010 not 2009(See the query for further date calculation understanding). Anyway, the date calculations are not the issue here.
I only have one table, so if I am not mistaken, I can't use the WHERE (SELECT... JOIN) feature. I also was unsuccessful at using SQL DISTINCT.
I am running ACCESS 2010 Tables are ACCESS 2007.
OS is Windows 7 Ultimate.
I have included a same database with the queries. qryEmployeesAnually2 is the results I am trying to achieve.
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Sep 24, 2013
I have a query which returns a calculated percent. I have ordered that in descending order, and now want to see the top 50. So (In Access 2010) I entered 50 into 'Return'. But it returns all of the records!
Is this because pct is a calculated field? How can I correct this? The SQL seems to be correct.
Code:
SELECT TOP 50 HeciFail1.POHECI, HeciFail1.POQTY, HeciFail1.FAILQTY, IIf(Nz([FAILQTY])>0,Round(100/([POQTY]/[FAILQTY]),0),0) AS PCT
FROM HeciFail1
ORDER BY IIf(Nz([FAILQTY])>0,Round(100/([POQTY]/[FAILQTY]),0),0) DESC;
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Feb 23, 2015
How can you export cross tab queries by using date parameters (for example: Jan 1, 2014 to December 31, 2014)...
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Apr 30, 2015
I was wondering how to do a crosstab query and have to column headings
I need the Organization Number and the Org name..so something like this
4005 4010
Office of HQ Office of Accounting
Is this possible?
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Sep 30, 2014
I am working on a report that has some special characteristics.
Let's say I have a list of groups of Vendors in a table, complete with VendorID. I have 3 other tables that use the VendorID: Complaints, Complements, and Terminations.
Each of these tables has a date that the Complaint, Complement, and Termination notice was received.
Every Fiscal Quarter, a report is pulled that looks back over the 4 preceding quarters to determine if a 5% threshold has been crossed by any of the vendor-groups in regards to the amount of Complaints they received.
The equation used for that is : (complaints/vendors_in_group)*100
It is imperative that the information has the current fiscal year and fiscal month (which I am tracking with functions from MS website), and I need to be able to store the information attached to the fiscal year and month.So when a user goes to the form and inputs the desired Fiscal Year and Fiscal Month, the database can display the 4 previous quarters of information...split into Q1, Q2, Q3, and Q4.
What I would like to have happen is to be able to have one table where the information is stored, quarterly, so that it can be retrieved for the report.
Questions:
1. Is it possible to have one line, per VendorID, that has the total number of Complements, Complaints, and Terminations, as well as the threshold percent stored in a table? Right now, I am getting LOTS of duplicates and blank lines when I try to put them all together. It has the right data, but takes about 10 rows per VendorID.
2. It is very important that the total number of Vendors in a group be captured on that quarterly report, so maintaining that number, in the same table, is essential and must be tied to the VendorID.
3. I have looked at Union Queries and Crosstabs, but I just dont know enough about them to make it work.
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Jan 14, 2014
Using Access 2010. Have been using a simple query to count similar items. All of a sudden I cannot get the sum of the count. I don't know if I have done something wrong or my program won't work correctly.
The DB is attached. The only query shown is an example of what I want to total, but I cannot get any total.
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Mar 15, 2014
i I have two queries.. What i'm hoping is to combine the result into one query but not in one column only but instead the result of the second query should be beside the first query.. The result of the second query should be added as a new column.
First Query
SELECT tbl_uSers.UserName, Count(tbl_rEceived_eMail.EntryID) AS eMailReceived
FROM tbl_rEceived_eMail INNER JOIN tbl_uSers ON tbl_rEceived_eMail.UseriD = tbl_uSers.UseriD
GROUP BY tbl_uSers.UserName;
Second Query
SELECT tbl_uSers.UserName, Count(tbl_rEceived_eMail.EntryID) AS eMailProcessed
FROM tbl_rEceived_eMail INNER JOIN tbl_uSers ON tbl_rEceived_eMail.UseriD = tbl_uSers.UseriD
GROUP BY tbl_uSers.UserName, tbl_rEceived_eMail.ProcessedYN
HAVING (((tbl_rEceived_eMail.ProcessedYN)="Y"));
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Jun 23, 2015
I have 3 select queries which Im trying to output to a combo - Ive tried a UNION query but I get an error
ODBC-- call failed ODBC Driver SQLBase.....
Firstly is do the results need to match within a union query? I mean they have no relationship what so ever Im just trying to populate this combo with the same results.
Secondly is there a better way to do it? 2 of the select queries query a linked SQL table and the third is a local table. All of the select queries work on their own.
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