Instantiate recordset with ORDER BY Access VBA - ms-access

I'm trying to create a recordset that is ordered according to a table and the current Orderby property of a certain form. Since the Orderby property will change when the users changes it, I made a function that gets the first field only (It's possible to order it using more than 1 field) in the Orderby property and using it to create an ordered recordset .The field's name given from the getField function is given correctly but I assume that the syntax of "Set rsAll = ..." is incorrect which is what I think is causing the code to stop.
Creating a Recordset in an ordered manner.
Dim rsAll As DAO.Recordset
If Len(Forms("All Patient Sub").OrderBy) > 0 Then
Set rsAll = CurrentDb.OpenRecordset("SELECT * FROM [All Patient Info] ORDER BY " & getField(Forms("All Patient Sub").OrderBy)) 'code stops here
Else
Set rsAll = CurrentDb.OpenRecordset("All Patient Info")
End If
The function that gets the field name from the Orderby property belonging to the form
Public Function getField(ByVal sorter As String) As String
Debug.Print "Started"
'i = 21 hence [All Patient Info].[ is skipped and starts from the field's name
For i = 21 To Len(sorter)
If Mid(sorter, i, 1) = "]" Then
getField = Mid(sorter, 21, i - 21)
Exit For
End If
Next i
Debug.Print getField
End Function

I don't really follow your code; however since you just want the first column in the orderBy, how about this:
This function needs to be put in a module:
'this returns either " ORDER BY [column name]" or an empty string, if there is no column name to order by
public function OrderByClause(propValue as string) as string
dim cols as string()
if propValue = "" then
OrderByClause = ""
else
cols = split(propValue, ",")
dim junk as string: junk = cols(0)
if instr(junk, ".") > 0 then
junk = mid(junk, instr(junk, ".") + 1)
end if
OrderByClause = " ORDER BY " & junk
end if
end function
Then in your form:
Dim rsAll As DAO.Recordset
Dim src as string
src = OrderByClause(Forms("All Patient Sub").OrderBy & "")
src = "SELECT * FROM [All Patient Info]" & src
Set rsAll = CurrentDb.OpenRecordset(src)
Since the OrderByClause function always returns a value, you can just call it in your form regardless of what the property is set to; The invocation uses ... & "" to prevent an error if the property is in fact null.

Related

Select randoms records from table but not more than 2 records of same name

I want to fetch TOP N random records from the table but not more than 2 records for same name.
SELECT TOP 7 Table1.ID, Table1.Name, Table1.Salary, Rnd(Abs([Table1]![id])) AS Expr1
FROM Table1
GROUP BY Table1.ID, Table1.Name, Table1.Salary, Rnd(Abs([Table1]![id]))
ORDER BY Rnd(Abs([Table1]![id]));
It is giving more than two records for same name. Would someone please provide some assistance.
Use this query:
SELECT
ID,
[Name]
FROM
[Table1]
ORDER BY
Rnd(-Timer()*[ID]);
Then open it as a Recordset and traverse it from the start and pick IDs (could be saved in an array) while recording the the Name used (a Collection could be used for this).
If a Name has been used twice, skip the record and move to the next.
When you have picked seven IDs, stop. The array of IDs will identify your seven records.
Save the query as RandomAll. Then use it in this function:
Public Function RandomTwo() As long()
Dim rs As DAO.Recordset
Dim Names As New Collection
Dim Used As Integer
Dim Index As Integer
Dim Ids() As Long
Set rs = CurrentDb.OpenRecordset("RandomAll")
ReDim Ids(0)
Do While Not rs.EOF
Used = 0
' Read used count. Will fail if not used.
On Error Resume Next
Used = Val(Names.Item(rs.Fields(1).Value))
On Error GoTo 0
Debug.Print Used, ;
If Used = 1 Then
' Remove key to be added later with updated use count.
Names.Remove rs.Fields(1).Value
End If
If Used < 2 Then
' Record the use count (as text) of the key.
Names.Add CStr(Used + 1), rs.Fields(1).Value
Debug.Print rs!ID.Value, rs.Fields(1).Value
' Add ID to array.
Ids(UBound(Ids)) = rs!ID.Value
If UBound(Ids) = 6 Then
' Seven IDs found.
Exit Do
Else
' Prepare for next ID.
ReDim Preserve Ids(UBound(Ids) + 1)
End If
End If
rs.MoveNext
Loop
rs.Close
' List the found IDs.
For Index = LBound(Ids) To UBound(Ids)
Debug.Print Index, Ids(Index)
Next
' Return the IDs.
RandomTwo = Ids
End Function
The function will return the array holding the seven IDs.
Taking inspiration from Gustav's answer I have designed a bit of VBA code that will generate a SQL string which when used will give you N amount of random records with a limit of 2 per name.
Const PicksLimit As Long = 7 'How many records do you want to select
Dim rs As DAO.Recordset
'Select randomised table
Set rs = CurrentDb.OpenRecordset("SELECT ID, Name From Table1 ORDER BY Rnd(Abs(ID))")
'Define variables for keeping track of picked IDs
Dim Picks As Long, PickNames As String, PicksSQL As String
Picks = 0
PickNames = ""
PicksSQL = ""
With rs
If Not (.BOF And .EOF) Then 'If table is not empty...
.MoveFirst
'Loop until limit reached or table fully looked through
Do Until Picks = PicksLimit Or .EOF
'If name has been picked less than twice before
If Len(PickNames) - Len(Replace(PickNames, "[" & !Name & "]", "")) < ((Len(!Name) + 2) * 2) Then
Picks = Picks + 1 'Increment counter
PickNames = PickNames & "[" & !Name & "]" 'Add name for later checks
PicksSQL = PicksSQL & "ID = " & !Id & " OR " 'Append SQL string
End If
.MoveNext
Loop
'Add front sql section and remove last OR
PicksSQL = "SELECT * FROM Table1 WHERE " & Left(PicksSQL, Len(PicksSQL) - 4)
Else
'If the table is empty no need for ID checks
PicksSQL = "SELECT * FROM Table1"
End If
End With
rs.Close
Set rs = Nothing
'Print SQL String (This can be changed to set a RecordSource or similar
Debug.Print (PicksSQL)
At the moment the SQL string is just printed to the Immediate window but this can be changed to go wherever you need, like a subform's RecordSource for instance.
The code will need to be run every time you want a new random list but it shouldn't take a huge amount of time so I don't see that being too big an issue.

Populating access table from form multi-record textbox

I am trying to use this code to pick comma seperated numbers from ExcUID text box of form and then feed them into tblExcIndivList table.
However what I am trying to do it to split ex: 123,1213 into lines and put them in seperate rows of UID column of tblExcIndivList table but it gets saved as 1231213 in the same cell.
Sub Upd_UID()
Dim var As Variant
Dim i As Long
var = Split(Forms.Agen_Report.ExcUID.Value, vbNewLine)
CurrentDb.Execute "DELETE * FROM tblExcIndivList;", dbFailOnError
For i = 0 To UBound(var)
CurrentDb.Execute Replace("INSERT INTO tblExcIndivList ( UID ) VALUES ( '#V' );", "#V", var(i)), dbFailOnError
Next i
End Sub
Please help.
You are not splitting correctly your string, you say it is comma-separated (i.e. 123,1213) and try to split it with vbNewLine. You should specify the comma as separator:
var = Split(Forms.Agen_Report.ExcUID.Value, ",")
This will get you past this error and split correctly the input. However I cant make sure whether your query is well-formed.
I think you need something like this.
Option Explicit
Dim aCell As Range
Private Sub UserForm_Initialize()
'~~> Change Sheet1 to the relevant sheet name
'~~> Change A1:E1 to the relevant range
For Each aCell In ThisWorkbook.Sheets("Sheet1").Range("A1:E1")
If InStr(1, aCell.Value, ",") Then _
ComboBox1.AddItem Split(aCell.Value, ",")(0)
Next aCell
'~~> Remove duplicates
RemoveDuplicates ComboBox1
End Sub
Private Sub ComboBox1_Click()
Dim tmpStr As String
ComboBox2.Clear
For Each aCell In ThisWorkbook.Sheets("Sheet1").Range("A1:E1")
If InStr(1, aCell.Value, ",") Then _
tmpStr = Split(aCell.Value, ",")(0)
If Trim(ComboBox1.Value) = Trim(tmpStr) Then _
ComboBox2.AddItem aCell.Value
Next aCell
End Sub
'~~> Procedure to remove duplicates
Private Sub RemoveDuplicates(cmb As ComboBox)
Dim a As Integer, b As Integer, c As Integer
a = cmb.ListCount - 1
Do While a >= 0
For b = a - 1 To 0 Step -1
If cmb.List(b) = cmb.List(a) Then
cmb.RemoveItem b
a = a - 1
End If
Next b
a = a - 1
Loop
End Sub

Display single db value in msgbox

I have the following vba code in an access 2007 file:
Private Sub Form_Load()
Dim a As String
Dim b As DAO.Recordset
a = " select col1 from table1 where id = 1 "
Set b = CurrentDb.OpenRecordset(a)
MsgBox (b)
b.Close
End Sub
But I am getting the following error on the MsgBox (b) line. Any idea why that's happening? The query returns a single value, which I want to display in a message box.
If you want the MsgBox to display the value contained in the first column of your recordset, you can do it this way ...
MsgBox b(0)
However, you don't really need to open a recordset to retrieve that single value. You could use a DLookup expression instead.
MsgBox DLookup("col1", "table1", "id = 1")
Like Matteo mentioned you need to pass a String or something that can be converted to a String to MsgBox. In this case you can specify the field in your select query.
Private Sub Form_Load()
Dim a As String
Dim b As DAO.Recordset
a = " select col1 from table1 where id = 1 "
Set b = CurrentDb.OpenRecordset(a)
MsgBox b.Fields("col1") ' Msgbox b("col1") should also work
b.Close
End Sub

combine values from multiple records based on common ID

I've tried many different methods to join the following from;
StockCode Finished_Goods_Codes
100137 2105109
100137 2105110
100137 2105111
To;
StockCode Finished_Goods_Codes
100137 2105109, 2105110, 2105111
My Current Code is as follows;
Public Function ListQuery()
Dim curr As Database
Dim rs As Recordset
Dim SQLCmd As String
Dim productList As String
Set curr = CurrentDb()
SQLCmd = "SELECT Finished_Goods_Codes FROM TEMP_codes WHERE [StockCode] = """ & StockCode & """"
Set rs = curr.OpenRecordset(SQLCmd)
If Not rs.EOF Then
rs.MoveFirst
End If
Do While Not rs.EOF
productList = productList & rs(0) & ", "
rs.MoveNext
Loop
ListQuery = productList
End Function
My Query currently runs the following;
SELECT TEMP_codes.StockCode, ListQuery([Products]) AS [List of Products]
FROM TEMP_codes
GROUP BY TEMP_codes.StockCode;
Could you please help as i'm really stuck on this.
Many Thanks in advance.
Based on the answer given for the question Microsoft Access condense multiple lines in a table, here are the steps:
1 Create the following function
Public Function GetList(SQL As String _
, Optional ColumnDelimeter As String = ", " _
, Optional RowDelimeter As String = vbCrLf) As String
'PURPOSE: to return a combined string from the passed query
'ARGS:
' 1. SQL is a valid Select statement
' 2. ColumnDelimiter is the character(s) that separate each column
' 3. RowDelimiter is the character(s) that separate each row
'RETURN VAL: Concatenated list
'DESIGN NOTES:
'EXAMPLE CALL: =GetList("Select Col1,Col2 From Table1 Where Table1.Key = " & OuterTable.Key)
Const PROCNAME = "GetList"
Const adClipString = 2
Dim oConn As ADODB.Connection
Dim oRS As ADODB.Recordset
Dim sResult As String
On Error GoTo ProcErr
Set oConn = CurrentProject.Connection
Set oRS = oConn.Execute(SQL)
sResult = oRS.GetString(adClipString, -1, ColumnDelimeter, RowDelimeter)
If Right(sResult, Len(RowDelimeter)) = RowDelimeter Then
sResult = Mid$(sResult, 1, Len(sResult) - Len(RowDelimeter))
End If
GetList = sResult
oRS.Close
oConn.Close
CleanUp:
Set oRS = Nothing
Set oConn = Nothing
Exit Function
ProcErr:
' insert error handler
Resume CleanUp
End Function
2 Add a Reference for the function in the Module (Tools -> References). Add the Reference Micorosft ActiveX Data Objects 6.1 Library (or the most recent one available).
3 Save the Module with a name different from the function name, say Concatenation
4 Run the following query
SELECT T.StockCode, GetList("Select Finished_Goods_Codes From TEMP_codes As T1 Where T1.StockCode = " & [T].[StockCode],"",", ") AS Finished_Goods_Codes
FROM TEMP_codes AS T
GROUP BY T.StockCode;

Dynamic Query Criteria

I'm trying to make a Microsoft Access query depend on a value in another form's textbox.
This is the criteria, as it is now. Basically, any date between April 1st 2014, and March 31st 2015. This works well.
>=#2014-04-01# And <#2015-04-01#
I'd like to have a textbox with the year (with the current example 2014), and make the query criteria (2014, 2014+1) depend on this value.
I've tried to split the above syntax, then concatenate in the criteria, as such:
">=#" & "2014" & "-04-01# And <#" & "2015" & "-04-01#"
And I get an error "Data types in the criterion expression are incompatible".
1. Is it possible to concatenate in the query criteria?
I have also tried the SQL CONCAT(string1,string2,string3,..), to no avail.
If this is possible, then I guess I can use [Forms]![Form1].[Textbox1] and ([Forms]![Form1].[Textbox1] + 1) to replace the years.
If this is not possible...
2. Is there a better way to make the query criteria dynamic?
I tried to make the following solution work by creating a module with similar code:
Private m_varQueryParam As Variant
Public Function SetQueryParam(ByVal sValue as Variant)
m_varQueryParam = sValue
End Function
Public Function GetQueryParam() As Variant
GetQueryParam = m_varQueryParam
End Function
Query:
SELECT * FROM tblYourTable WHERE [FilterField] = GetQueryParam()
The VBA Code to launch the query will look like this.
SetQueryParam "your value here"
DoCmd.OpenQuery "qryYourQueryHere"
But I simply do not understand how to get this to work.
EDIT: I created a simple access database, to try to get this to work.
Textbox1, default value =Date()
bSave, button
tDateInfo, table: date (date/time), info (text) with random dates and info.
Query1:
SELECT tDateInfo.date, tDateInfo.info
FROM tDateInfo
WHERE (((tDateInfo.date)=GetQueryParam()));
Here's the form's vba code
Option Compare Database
Private Sub bSave_Click()
sValue = Me.TextBox1.Value
SetQueryParam (sValue)
End Sub
Here's the modules vba code
Option Compare Database
Option Explicit
'is this necessary?
Private m_varQueryParam As Variant
Public Function SetQueryParam(ByVal sValue As Variant)
m_varQueryParam = sValue
End Function
Public Function GetQueryParam() As Variant
GetQueryParam = m_varQueryParam
End Function
And the query criteria is GetQueryParam()
Thank you for your help.
Handling parameters and form fields is a little tricky with VBA. I created a simple table similar to yours as follows:
CREATE TABLE DateCalc (
ID AutoNumber,
FilterField DateTime
)
The following code will return your desired results:
Sub testthis()
Dim db As dao.database
Set db = CurrentDb ' use current database
Dim qd As dao.QueryDef
Set qd = db.CreateQueryDef("") ' create anaonymous querydef
' the SQL statement correctly concatenates the parameter (Useyear) and mm/dd strings
qd.sql = "SELECT * FROM DateCalc WHERE [FilterField] >= [UseYear]" & "-04-01 And [FilterField] < [UseYear]+1" & "-04-01"
qd!UseYear = Forms!DateCalc!txtYear ' set the value of se year from the Form WHICH MUST BE OPEN
' AND the TetBox filled with the year you desire - 2014 for this example.
Dim rs As dao.recordSet
Set rs = qd.OpenRecordset
MsgBox "ID=" & rs(0) & ", Date=" & rs(1)
End Sub
NEW VERSION
Sorry, there were a couple of date formatting problems with the first solution that the following code resolves. There are a number of other reasons for the error, so be sure the FormName is "DateCalc" and the TextBox is named "txtYear".
You should be able to generalize the following code for all your queries (do those actually work?). I pass the TableName in now as an example:
Sub DateFilter(TableName As String)
Dim db As dao.database
Set db = CurrentDb ' use current database
Dim qd As dao.QueryDef
Set qd = db.CreateQueryDef("") ' create anaonymous querydef
' the SQL statement correctly concatenates the parameter (Useyear) and mm/dd strings
Dim UseYear As Integer
UseYear = Forms!DateCalc!txtYear
Dim BegDate As Date
BegDate = CDate(UseYear & "-04-01")
Dim EndDate As Date
EndDate = CDate((UseYear + 1) & "-04-01")
qd.sql = "SELECT * FROM " & TableName & " WHERE [FilterField] >= [UseBegDate] And [FilterField] < [UseEndDate]"
qd!UseBegDate = BegDate
qd!UseEndDate = EndDate
Dim rs As dao.recordSet
Set rs = qd.OpenRecordset
Do While Not rs.EOF
MsgBox "ID=" & rs(0) & ", Date=" & rs(1)
rs.MoveNext
Loop
End Sub
I think I found a solution.
The following code defines the SQL as I require it, and changes the SQL for the Access query.
It's not ideal, because it requires me to rewrite all the SQL for the queries, but it works.
Sub ChangeQuery()
Dim Year, sqlTwo, StartDate, EndDate As String
Year = Me.txtYear.Value
StartDate = "4/1/" & Year
EndDate = "4/1/" & (Year + 1)
sqlTwo = "SELECT DateCalc.ID, DateCalc.FilterField FROM DateCalc WHERE (((DateCalc.FilterField)>=#" & StartDate & "# And DateCalc.FilterField<#" & EndDate & "#));"
tbTest.Value = sqlTwo
Dim oDB As Database
Dim oQuery As QueryDef
Set oDB = CurrentDb
Set oQuery = oDB.QueryDefs("Query1")
oQuery.SQL = sqlTwo
Set oQuery = Nothing
Set oDB = Nothing
End Sub
Private Sub Button_Click()
ChangeQuery
End Sub