Binary Values In Access
Dec 6, 2006
Hi
I have a problem in binary type in access
I have some values that are between 1 to 32 byte
I want to specify the type of my field to something like "varbinary" such as SQL server but I have not this type
actually I used OLE object type but it doesn't like it.
for example when I use:
insert into t_t1(i,j) values(1,23)
while j's type is OLE object,
the row is inserted but I can not see the value of j column and I can not select on j column too for example
select * from t_t1 where j=23
has no result.
furthermore, I want to use hex values but I can not do it.
when I use
insert into t_t1(i,j) values(1,0xAD)
I got an error that says the type is mismatched
I know it may shows I expect unreasonably from access but please help me to find the solution
thanks for your attention
Best regard
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Jan 6, 2006
I am trying to store binary values (as decimal long integers) and then use bitwise comparisons to update the values. MS help suggest that the standard logical operators (And or etc) can do bitwise comparison as opposed to comparing boolean logical values for expressions; but I have found no way of making this work.
Is this possible? Any ideas. Doing it mechanically, by splitting the decimal into the relevant parts for any bit is very tedious!
Gibbo
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Jul 24, 2006
I am looking for some help, I have a access database that is interfacing to a sql storage.
The problem I am having, is I have a Image that is containing archives for emails, however I have been yet to figure out hor to read that text stored in the image.
So far I have been able to come up with the data being stored in binary, but am unable to read it in a access form.
Make sence? Hope so.
Through SQL, I am able to run a query to read the data:
SELECT CONVERT(varchar(8000),CAST (body AS binary(8000) )) from arc_bodies
However I would like this text to be read through a form in access, and am unable to figure out how... Please help if possible, would be greatly appreciated.
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Jan 29, 2007
Hi there,
I have a simple bit of VBcode in my database which reads the password a user enters and 'encrypts' it for storing in the user table. It's more obfuscation than encryption to be honest, and I feel limited by the 'text' data type assigned to the password field.
At the moment it works by taking the password entered, and converting the whole lot into a byte array, then for each 'character' in the array, changing its binary value. At the moment it's then converted back into a string and dumped into the 'password' field, as garbage characters. But they are still characters, and if I go out of range of the character set it results in horrible errors :D.
I feel I may be missing the blindingly obvious and could just not convert it back to string, and write the binary into a text field instead, but I'm not sure how I'd get intelligible data back.
The reason it's not exactly encryption is because the key is the same for all characters on all passwords (I just multiply the binary value by 2!) what I want is to have a key as well, stored in another field alongside, but again can't implement this due to character-set range issues.
So my question is - is there a 'raw' data field hidden somewhere amongst the features of microsoft access, or should I be thinking about just storing the numbers themselves? For the moment I'll investigate the latter, but I'll appreciate any help! Thanks :)
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Sep 24, 2013
I have a text column with hexadecimal strings like "4E1B0A65FE3299FE", ie. of length 16.I'm doing an ALTER COLUMN query to convert the column to varbinary, but Access is doing conversion by ASCII, which results in a varbinary field of size 32, I think this is because the text column is in Unicode.
SQL Server has something called "styles" which are used with CONVERT.where you can choose to convert by two characters at a time 2:1..How do I do the same in an Access query? CONVERT/CAST are no supported.
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May 10, 2014
i want to copy binary data to another table with same structure.
how can i do this.
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May 30, 2013
I have requirement to draw a binary tree in forms, how to implement this?
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Jan 31, 2008
This the first time I post in this forum and I tried looking for an answer to my question before posting, so I apologize if my question has been answered previously.
Is it possible to determine, in Access 2000, the data type in a Make-Table query of a new column with null value so that it does not default to binary.
Here is my sample sql:
SELECT tblAddressBook.Name, Null AS Email INTO tblTestTable
FROM tblAddressBook;
The output is tblTestTable with two columns: Name and Email. The data type of column Email defaults to Binary. How do I make it default to Text.
Thank you.
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Oct 7, 2014
I am looking for a function that will allow me to encrypt/decrypt single image files as and when required. I have built my own simple one to encrypt a string that will be stored in a filename as all the ones I found created unusable filenames.
However I don't know where to start with the image file encryption.
(Any better way to encrypt a string that can be used in a file name that would be great too. My method is a bit basic).
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Apr 8, 2013
I am working on a project that requires data transfer using TCPIP sockets. I am using a 3rd party Library (Ostrosoft) that handles the wsock32.dll api calls.
The project calls for the creation of a header that logs into a user account.
The first part of the header is a marker, with a value of 4,275,878,552. It is to be supplied in a Binary format of length 4.
My quesion is "How do I create this marker".
What I have tried so far is a string variable - strMarker thus:
strMarker = ChrB(&HFE) & ChrB(&HDC) & ChrB(&HBA) & ChrB(&H98)
Using the ChrB function to convert the Hex version of that number (FEDCBA98)
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Nov 22, 2006
I am currently attempting to use SQL in Access to alter a table by adding a new attribute and giving it a default value. Creating the attribute is fine but i keep getting an error when attempting to assign a default value. My code is as follows:
ALTER TABLE Objects
ADD Status Text DEFAULT 'Object is Currently In';
It keeps telling me that I have a Syntax error.
Any help would be greatly appreciated.
Thanks
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Oct 8, 2014
I have an ongoing error in ms access vba, being pretty new to the app i am stuck, i have a split database where in i am trying to execute a query in vba but it is throwing the error"No values found for one or more given parameter" however when i debug.print the query and run in ms access it works fine,
Below is the query:
qry = "SELECT * FROM Core"
qry1 = qry & " WHERE (((Core.Activity='" & UCase([Forms]![frmReports]![cmbrptactivity]) & "') AND (Core.Unit='" & UCase([Forms]![frmReports]![cmbunit]) & "') AND (Core.Dt_Upload Between #" & [Forms]![frmReports]![txtDate1] & "# And #" & [Forms]![frmReports]![txtDate2] & "#)))"
[Code] .....
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Nov 7, 2006
I am writing an access database which has to store properties for an estate agent. They have a PropertyID field which is the primary key in this table. The ID is always in the following format PL219AD23 (postcode PL21 9AD and house number 23) Is there a way that once an address of a property is entered then the ID is generated from that? Or do they always have to enter the property ID themselfs.
Any help or tips would be appreciated..
Thanks
Fraser
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Aug 2, 2007
Hello,
I wanted to catch a little advice if I may be so bold. I have a HTML form with a series of checkbox values.
Code:<form method=post action=form-test.asp><input type=checkbox name=drinks value='cocal-cola'>cocal-cola<input type=checkbox name=drinks value='sprite'>sprite'<input type=checkbox name=drinks value='lucozade'>lucozade<input type=checkbox name=drinks value='oasis'>oasis<input type=submit value='Submit'></form>
Normally I would gather these up into an array using ASP and email the split up comma separated values out to the client via an email.
Code:drinks=Request("drinks")drinks_split=split(drinks,",")'email drinks to client
However, this time I need to store those values in an access database. I am assuming that the client may want to run queries on the different array values, for example, how may people chose coca cola and sprite.
Is it better to store the value separately - one Ms access field for coca cola, one for sprite (which is what I thought I would have to do to create queries on this) - or can they be stored under one field heading "drinks" and queries be performed on different values within that field?
Could someone explain a quick way of doing the latter i possible in MS access and the SQL for querying?
Cheers,
trufla
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Nov 21, 2013
I have a database that deals with rented movies. I want a means in Access to enable the stock values of the movie to be updated whenever there is an order for a certain film and whenever its returned. I am not sure if an update query or a macro is needed for this to work and how each would work.
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Sep 6, 2006
Hi, I am converting a database from Access 2002 to Excel 2002 but when converted each value in the spreadsheet has the value ' directly before it. Is there anyway around this problem.
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Apr 11, 2006
Greetings,
Is there any way to fill cells in Access tables with the results of using vLookup in an Excel worksheet? I'm trying to vLookup the quantity of products sold in the worksheet and make that number available on an Access table and form. Can the two aps jibe like this?
Thanks for the feedback :D
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Apr 14, 2008
Hallo,
I need your guidance to do the following;
On a click of a button from the Form the following should execute.
I have created 50 queries. Each query has more than 1000 recordsets.
1. I want to count the number of rows for each query (50 queries = 50 different values)
2. create one table and populate those 50 different values into the table
3. Using those values in the table; a Stack column chart has to be created.
In simple explanation; on a click of a button the data should be processed and chart has to be created.
Just a tip will also do to try on my side.
Thank you in advance
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Oct 5, 2006
Is Access slower at summing null records than SQL server?
I have a query which takes less than 1second in SQL server but takes about 5-10 in Access but can't think why there is such a lag in processing speeds.
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Oct 10, 2005
I trying to change empty values in a query/Table to zeros so that I can use them in calculations.
I try to use the Nz function and the IsNull function but both give me the same result: "Compile Error" when I try to switch from design view to datasheet view.
This is what I put in a field: 'Expr1: nz([cancelamount],0)'
(IsNull has he same effect).
I went to multiple sites and this is how they explain the function should look like.
My question is:
do I have to enable something to use this function?
Am I typing it in wrong?
(using access 2002)
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Mar 8, 2007
Here is my code:PHP Code:<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim Dbconnection, sqlcommand, dbcommunication, dbread
Dbconnection = New Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;data source=" & Server.MapPath("LAM.mdb"))
Dbconnection.Open()
sqlcommand = "INSERT INTO Customers([CustomerID],[LastName],[FirstName],[Title],[BirthDate],[Address],[Town],[County],[PostCode],[HomePhone]) values ('" & CustomerID.Text & "', '" & LastName.Text & "', '" & FirstName.Text & "','" & Title.Text & "', '" & BirthDate.Text & "', '" & Address.Text & "', '" & Town.Text & "', '" & County.Text & "', '" & PostCode.Text & "', '" & HomePhone.Text & "')"
dbcommunication = New Data.OleDb.OleDbCommand(sqlcommand, Dbconnection)
dbread = dbcommunication.ExecuteReader()
dbread.Close()
Dbconnection.Close()
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="CustomerID" runat="server"></asp:TextBox><br />
<asp:TextBox ID="LastName" runat="server"></asp:TextBox><br />
<asp:TextBox ID="FirstName" runat="server"></asp:TextBox><br />
<asp:TextBox ID="Title" runat="server"></asp:TextBox><br />
<asp:TextBox ID="BirthDate" runat="server"></asp:TextBox><br />
<asp:TextBox ID="Address" runat="server"></asp:TextBox><br />
<asp:TextBox ID="Town" runat="server"></asp:TextBox><br />
<asp:TextBox ID="County" runat="server"></asp:TextBox><br />
<asp:TextBox ID="PostCode" runat="server"></asp:TextBox><br />
<asp:TextBox ID="HomePhone" runat="server"></asp:TextBox><br />
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /> </div>
</form>
</body>
</html>
It says the problem is with: PHP Code: dbread = dbcommunication.ExecuteReader()
Can I get some advice on this please,
Jane
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Feb 4, 2014
I am trying to extract some values from a PDF (attached) and write them to an Access database. I am unsure of the approach, especially extracting values from the file.
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Feb 25, 2013
Access charts know if it's possible to change the value axis values.
I create a chart getting values from a query I run, it plots the values but auto selects the value range and the increment.
The values on the value axis are : 0, 0.25, 0.5, 0.75, 1
Is there anyway I can get the values to increase by 0.1 rather than 0.25?
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Apr 17, 2013
I am currently creating an Access 2007 database for calculating salesperson commissions. I have a table with 5 fields I'm working with: SalesRep, SOWRep, TerritoryRep, Period and Commission. I am trying to build a query that will calculate commission for a salesperson for each record where their name appears in one of the first three fields. Each time their name appears, they get the commission listed in the Commission field for the stated Period. I have managed to do this part successfully. My problem now is that I am creating a query that will sum all of their commissions by Period. I have run into a situation where sometimes a salesperson will not appear in one of the rep fields, resulting in NULL values in the previous queries. How can I create a final query that will sum correctly even if there are NULL values returned on the previous queries?
Here is what I have so far:
November: Avg((SELECT [SumOf1/3GM$s] FROM [BaxterActualMargin1] WHERE [Period] Like "November*")+(SELECT [SumOf1/3GM$s] FROM [BaxterActualMargin2] WHERE [Period] Like "November*")+(SELECT [SumOf1/3GM$s] FROM [BaxterActualMargin3] WHERE [Period] Like "November*"))
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Dec 31, 2010
I have a report which has say two columns - staff number and visit date. For a staff number (which is unique) there may be more than one visit date. But I want to list a staff number only once and not multiple times in the column (but want all the visit dates of course). How can I do that?
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Dec 19, 2012
NOTE: Im working in MS Access 2003, only results in this SQL/database (not mysyl, MSSQL etc)
I want to be able to ORDER an SQL query and put the NULL values last.
I have a basic databse:
Table name: PeopleTable
Field names: TableID, PersonField, PersonID
The aim is to order by PersonID and put the NULL values last
See pic1.jpg;
The picture (pic1.jpg) shows the database as it is without a query.
See pic2.jpg;
Picture 2 (pic2.jpg) shows the query results when I use the orderby statement (SELECT * FROM PeopleTable ORDER BY PersonID As you can see it shows the results ordered by the PersonID however the NULL values are first.
See pic3.jpg
Desired results, it is ordered by the PeronID and the NULL values are last (NOTE this is an editied screenshot).How can i achieve this is MS Access 2003?
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