Queries :: Return Entire Rows With Min Date Only
Apr 15, 2015
I am looking to return one row from groups of the same EpisodeID whereby the row with the minimum date is selected each time. This includes returning all other fields in the row such as EventID below and ideally others as well if that will be possible.
To illustrate I include the following. What Access 2003 query would I need to return all the rows with the earliest dates? EventID will be unique in the intial table.
Code:
EventsTable
```````````
EpisodeID | EventID | EventDate
-------------+---------------+-------------
1 | 001 | 01/02/2010
1 | 023 | 05/10/2009
1 | 103 | 12/02/2010
2 | 004 | 02/03/2013
2 | 102 | 12/10/2014
3 | 546 | 04/05/2012
3 | 100 | 08/08/2013
3 | 034 | 10/10/2012
3 | 066 | 02/03/2013
4 | 777 | 05/07/2014
4 | 233 | 01/11/2012
5 | 087 | 10/03/2011
Code:
ExpectedOutput
``````````````
EpisodeID | EventID | EventDate
-------------+-------------------+---------------
1 | 023 | 05/10/2009
2 | 004 | 02/03/2013
3 | 546 | 04/05/2012
4 | 233 | 01/11/2012
5 | 087 | 10/03/2011
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Jul 16, 2014
For each record in my database, there are observation periods which are recorded in the format dd/mm/yyyy hh:mm:ss, titles as follows
1st Obs Start
1st Obs End
2nd Obs Start
2nd Obs End
3rd Obs Start
3rd Obs End.
I have been asked to create a query that will quickly show how many obervation periods commenced in a particular month. What I am trying to do is create a column that will be named Obs Start, and another, Obs End. For each record ID, this would then show as follows:
ID......Obs Start.............Obs End........
1....[1st Obs Start].....[1st Obs End]....
1....[2nd Obs Start]....[2nd Obs End]....
2....[1st Obs Start].....[1st Obs End]....
2....[2nd Obs Start]....[2nd Obs End]....
2....[3rd Obs Start].....[3rd Obs End]....
3....[1st Obs Start].....[1st Obs End]....
4....[1st Obs Start].....[1st Obs End]....
etc.
I could then quickly count how many obs periods started within the desired month.
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May 20, 2014
In a query I'm trying to return a list of rows sorted by Service Type Ascending and then the last item in the list should be a row called "Add Edit Value".If I 'ORDER BY 2' then the "Add/Edit" row appears at the top which is not what i want.
My SQL:
SELECT '' As ServiceTypeID, 'ADD/EDIT VALUES' As ServiceType FROM ServiceTypes UNION SELECT ServiceTypes.ServiceTypeID, ServiceTypes.ServiceType FROM ServiceTypes
ORDER BY 1 DESC;
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Sep 16, 2014
I have a simple UDF that takes a string and returns a variant, which is an array of strings Example Input "Brick Wall" Return value would be a variant array with first element "Brick" and and second element "Wall" Now I have a table with a field of strings, and I want to make a query that returns all the results from the function, one per line.
So if my input table looks like this
[strField]
"kick the ball"
"return the pass"
my query result should looks like this
[Orig] [new]
"kick the ball" "kick"
"kick the ball" "the"
"kick the ball" "ball"
"return the pass" "return"
"return the pass" "the"
"return the pass" "pass"
Last time I had to do something like this I used VBA exclusively, with ADO objects, but I thought a query based solution would be easier.
With my current data the largest return array size my function returns is 27 elements but I wouldn't want to rely on that number being fixed.
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Aug 19, 2015
I have a table that has entries recorded with date and time in one field, and I want to have a query that returns all records of a specified date or date range, regardless of the time in the field.
I have tried
Code:
Between [StartDate:] And [EndDate:]
And
Code:
Between [StartDate:] & "00:00" And [EndDate:] & "23:59"
Neither of which work ....
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Aug 8, 2013
I have a query where I display the [OPEN DATE] and [CLOSE DATE] of my cases. However, when I run this query sometimes the cases are not closed yet, therefore there are null values. However, I also have a field to calculate the datediff between these two dates. I need the [CLOSE DATE] field to display today's date when it is a null value so that I can still get a count of the days using datediff when I run the query.
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Apr 10, 2013
My issue surrounds retrieving the last (based on most recent date) set of records based on the most recent date. I have query, containing 2 tables as the sources for the query results. Currently, the query yields:
Field A Field B Field C
123456 AAAA 1/8/13
123456 BBBBI 1/8/13
123456 CCCC 1/8/13
123456 DDDD 1/8/13
123456 EEEEEE 3/10/13
123456 FFFFFF 3/10/13
123456 GGGG 3/10/13
123456 HHHH 3/28/13
123456 IIII 3/28/13
123456 JJJJ 3/28/13
The desired results would be to return all records with the last/max date, so yield:
123456 HHHH 3/28/13
123456 IIII 3/28/13
123456 JJJJ 3/28/13
I have tried the max & last functions, yet no success.
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Feb 20, 2014
I have a list of dates on which tasks were performed.
I want to be able to see if there is a pattern, i.e. lots done on a Monday
Can I extract the Day from the date, and return a value Monday, Tuesday, Wednesday etc??
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Jul 28, 2014
How do you return the most recent date of multiple columns.
I have a table (tbl_courses) that has a list of training courses. We want to know when a client completed the course most recently.
The problem is, for one course there has been up to 4/5 different variations of the course with different names over the years. E.g. "Drug awareness" has also been known as "Drug Aware" "Illegal Substances" and "Stoppers". I want to pull through the most recent date for all of the above.
We have a field in the Courses table that links the courses into groups (e.g. All drug aware courses come under "23"). Not sure if that works?
Is there a way to do this? The Tbl_Courses is linked to Tbl_Clients via a ClientID.
I've managed to do it in SQL using GREATEST() but that isn't an option in Access.
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Mar 22, 2015
Ok, so I'm sure this is a pretty simple criteria, but I just can't seem to get the syntax right.
I'm trying to allow my user to select any start date and the query will return that date plus the next three days.
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Jul 30, 2015
Basically, i have a table ("Transaction") with payment date and another table ("Control") with accounting dates and corresponding year/month.
Objective: I need to know which accounting year or month these payment date fall under.
Example: If the payment date is 18 Dec 2013, the accounting year should read as 2013 and the accounting month should read as 12.
In excel, this is very simple using vlookup.
I tried for hours using access dlookup query and i'm still stucked ..
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Apr 20, 2014
I have the below query (A). How do I calculate the Day of Therapy as shown in B
A
MRN Last Name DOA Service startDate INR Dose WarfID VisitID
12001 Smith 6/28/2013 Warfarin 6/29/2013 1.20 6 mg 10 138
12001 Smith 6/28/2013 Warfarin 6/30/2013 1.20 6 mg 11 138
12001 Smith 6/28/2013 Warfarin 7/1/2013 1.3 6 mg 12 138
12001 Smith 6/28/2013 Warfarin 7/2/2013 1.40 6 mg 13 138
12001 Smith 6/28/2013 Warfarin 7/3/2013 1.40 7.5 mg 14 138
12001 Smith 6/28/2013 Warfarin 7/4/2013 1.70 7.5 mg 15 138
12001 Smith 6/28/2013 Warfarin 7/5/2013 2.00 7.5 mg 16 138
11002 Brown 7/1/2013 Warfarin 7/1/2013 1.00 2 mg 17 139
11002 Brown 7/1/2013 Warfarin 7/2/2013 1.3 4 mg 18 139
11002 Brown 7/1/2013 Warfarin 7/3/2013 1.50 2 mg 19 139
11002 Brown 7/1/2013 Warfarin 7/4/2013 1.8 2 mg 20 139
11002 Brown 7/1/2013 Warfarin 7/5/2013 2.20 2 mg 21 139
1205972 Jones 6/28/2013 Warfarin 7/6/2013 1.0 6.5 mg 29 138
[code]....
What I really want is to calculate the time (# day) it takes to reach a target goal INR (2-3) I have tried DateDiff between DOA (date of admission) and Start date but this obvious won’t work because some patient won’t start on warfarin until later.
Another possibility is to calculate date difference between two rows in same column but I don’t know how For example Pt 1 = It take 7 days to reach an INR of 2, Patient #2 = it takes 5 days to reach an INR 2.2 and Patient #3 takes 6 days to reach an INR of 2.1. Average = 6 days.
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Jan 23, 2014
I've been trying to create a query that will take a date and return the week number of the date.
My original date is formatted m/d/yyyy
I need my weeks to start on Monday and I would like the week containing Jan 1st to be the first week of the year
I have tried using the following function:
DatePart("ww",#12/31/2001#,2,1)
but the I get a result of 53 in this query, when I expected/need it to be 1.
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May 13, 2014
Today is 13 May and this code is supposed to return the date of next Monday (19 May)
IIf(Weekday(Date())=1,Date()+1,Date()-(Weekday(Date())+9))
but it returns 1/5/2014 (Thursday May 1), when "Date" = 13/5/2014 (Tuesday May 13)
My begin week is Sunday (1) ,
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Nov 14, 2014
Trying to import some data from a linked Excel spreadsheet into a local table. One of the fields is a Date/Time type and is recorded in EST (Eastern Standard Time). I want to keep this field for posterity but also add a separate field with the corresponding time as per BST
For clarity, daylight savings time comes into effect this year on 26th Oct in the UK and 2nd Nov in the US. So generally, there is a 5 hour difference between the two time zones, apart from the period between these two dates, when it is only 4 hours.Here is my query - I am using a SWITCH function to create the BST field
Code:
INSERT INTO tblTransactions
SELECT ltbPayments.ID AS Reference, ltbPayments.VALUEDATE AS ValueDate, ltbPayments.LOCALAMOUNT AS Amount, ltbPayments.USDAMOUNT AS AmountUSD, tblAccounts.AccountID AS AccountID, ltbPayments.TRANSACTIONTIME AS TransactionTimeEST,
SWITCH(DateValue(ltbPayments.TRANSACTIONTIME) < DateSerial(2014,10,26) Or DateValue(ltbPayments.TRANSACTIONTIME) >= DateSerial(2014,11,2),
[code]....
So - how do I explicitly specify the output of the SWITCH function to be in Date/Time format (I presume, by default, it's returning Text, which contradicts the table properties of tblTransactions & the TransactionTimeBST field?...)
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Aug 16, 2006
I hope this is a simple query becuase my brain has drawn a blank on it.
I have a query with a parameter which a form textbox. If the text box has X value I want to use one list of parameters and if has Y I want to list all rows in the query.
Any help appreciated!
Dave
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Apr 24, 2013
I have a table which includes a start date field and completion date field for housebuilding.
I am trying to extract all records that have either a started date or a completed date between 2 dates supplied by the user. I have tried to use Between on both fields but that doesn't return results between the fields.
It workd if I just do it on EITHER the start date field OR the completion date field so that implies to me that I need to break it into 2 queries, one returning start date recrods and the other returning completion date records but then I would need to have somthing that removes records that appear in both the start date and the completion date results.
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Aug 15, 2013
I have a single table with customer information, one of the fields is a date field "LastContacted".
I'm creating a search form with 2 date fields (txtDate1 & txtDate2) to search a date range of the LastContacted field, and I need to write this into the query that the search form uses.
I have written this using Nz so that it can still return results if the search boxes are left blank:
Between Nz([Forms]![frm_AdvancedSearch]![txtDate1],#01/01/1989#) And Nz([Forms]![frm_AdvancedSearch]![txtDate2],#01/01/2999#)
This seems to work and it returns lines from the table where there is a date entered. However some of the fields in the table have no entry in the LastContacted field. How to code this query so that it also returns lines where the LastContacted field is blank in the table?
I have tried:
like "*" & (Between Nz([Forms]![frm_AdvancedSearch]![txtDate1],#01/01/1989#) And Nz([Forms]![frm_AdvancedSearch]![txtDate2],#01/01/2999#)) & "*"
but this returns errors when I try to run it.
I'm using Access 2010.
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Dec 31, 2012
I have a Query of dates and I need to have those dates return onto a from horizontally?
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May 19, 2015
I am trying to find the latest date in a table where the dates are in 2 separate columns and multiple rows. (there are business reasons why there are 2 dates per row they represent different but comparable activities)
I have a table "Assessment tracker" with the following structure
Name Type
Candidate short text
Unit short text
EV1 Date Date
EV2 Date Date
My Data:
Candidate Unit EV1Date EV2 Date
TH1 10 07/05/2015 25/05/15
TH1 10 07/05/2015 07/06/15
I have a query "Candidate AC Dates" that compares the 2 dates EV1 and EV2 and outputs a 3rd column with the latest date.
Query:
PARAMETERS [Candidate Name] Value;
SELECT [Assessment Tracker].Candidate, [Assessment Tracker].Unit, [Assessment Tracker].[EV1 Date], [Assessment Tracker].[EV2 Date], Max(MaxDate([Assessment Tracker]![EV1 Date],[Assessment Tracker]![EV2 Date])) AS Achdate
FROM UnitData INNER JOIN [Assessment Tracker] ON UnitData.Unit = [Assessment Tracker].Unit
[Code]....
Output:
CandidateUnitEV1 DateEV2 DateAchdate
TH11007/05/2015 25/05/201525/05/2015
TH11007/05/2015 07/06/201507/06/2015
It does this by using a function shamelessly copied from the web somewhere...
Function Maxdate(ParamArray FieldArray() As Variant)
' Declare the two local variables.
Dim I As Integer
Dim currentVal As Date' Set the variable currentVal equal to the array of values.
currentVal = FieldArray(0)
' Cycle through each value from the row to find the largest.
[Code]....
This is working well (I think)
I then want to find the latest date for the 2 records i.e. the Max value for the Achdate.
Query:
SELECT [Candidate AC Dates].Candidate AS Expr1, [Candidate AC Dates].Unit AS Expr2, Max([Candidate AC Dates].Achdate) AS MaxOfAchdate
FROM [Candidate AC Dates]
GROUP BY [Candidate AC Dates].Candidate, [Candidate AC Dates].Unit
ORDER BY [Candidate AC Dates].Candidate, [Candidate AC Dates].Unit, Max([Candidate AC Dates].Achdate) DESC;
But this is returning
Candidate Unit MaxOfAchdate
TH1 1025/05/2015
I expect it to return
Candidate UnitMaxOfAchdate
TH1 10 07/06/2015
It looks to me like MAX is considering only the day value rather than the whole date. I suspect this is because it is considering the results of the function in the first query as a short text rather than a date field. (I've tried to force this through declaring the variables as dates but don't know where else to force this. (I am UK based hence the DD/MM/YYYY format)
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Dec 16, 2013
I am building a report that has a header with several details followed by a detail section.
What I need to do is make the entire entry not visible on the report if one of the dates is null.
So it looks like this
last first title id memb # date a date b
1. smith , john fng 8521 2356224
5/12/2012 6/20/2013
10/2/2013 (is null)
2. neckbone, jim dude 2548 85858412
6/20/2013 5/5/2014
8/5/2013 2/31/2013
On the report i want the 1st entry (smith john) not to be visible due to the null (B) Date.... but i want it to be visible once the date is entered...
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Dec 8, 2013
I'm trying to make a search form that makes use of queries that search a table based on what fields I have. How would I go about having the query display all the fields for the record(s) that match the search criteria? This is for Access 2010.
As far as the query is set up, I have several fields with a search criteria, and the others are for displaying the relevant information about the results (since they're not search criteria, I used "Like '*'"). When I ran the query, it doesn't come up with anything - even if the record actually exists in the table with specified criteria.
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Feb 27, 2015
I have a local table that I am trying to append to a linked table. The fields are exactly the same. When I try to append the entire local table to the linked table I get an error code.
ODBC- insert on a link table failed.
[ctreeSQL]-17002 CT- Key value already exists in index (linked table field) (#-17002)
If I specify the criteria in the field to refer to a specific value in the local table, it updates it just fine. I want an append query because I don't want to manually update 500+ records!! I don't believe an update query would work because the values are not in the current linked table... so nothing to update!
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Aug 2, 2013
I have a field that contains 12 numbers. I need to replace the middle four numbers with a character so that the entire number is not readable. How do I do that?
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Jul 16, 2014
On my report, I want rows with expired dates to stand out by having their borders thicker. Something like:
Code:
If Me.txtDate < Date() Then
Me.txtDate.BorderWidth = 6
End If
When I do that, it ends up formatting every txtDate field in the report if one of them passes the If criteria instead of only ones that are expired.
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Oct 1, 2014
I have a query with three sub queries, all returning a number from different tables. But when any one of the sub queries returns a blank, the entire main query is blank.
How do I stop this from happening? I have tried NZ() on the sub queries and on the main query, but the blank still happens.
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