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POUpdating a field dependent on a date range in Access with VisualBasic and SQL
 

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  1. POUpdating a field dependent on a date range in Access with VisualBasic and SQL
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    <p>A friend and I have been trying for hours with little progress to a get a piece of code right for an invoicing system we're designing as a project.</p> <p>We are trying to update the field InvoiceNo to a value (worked out earlier in the VisualBasic code), where the CustomerNo is the is a specific value and the FinishDate is between two dates. At first I was trying to use TO_DATE but then we realized that wasn't the same in the SQL that Access uses (after much searching).</p> <p>This has been the simple statement I've been using to just test and try to get something working to then translate into VisualBasic and put in our variables. It's a little easier to read so I thought I'd provide it.</p> <pre><code>UPDATE tblJob SET tblJob.InvoiceNo = '8' WHERE tblJob.CustomerNo = '1' AND (tblJob.FinishDate BETWEEN cdate(format('08/09/2013', '##/##/####')) AND cdate(format('03/10/2013', '##/##/####'))); </code></pre> <p>I have a feeling after looking at a few examples that our date is meant to be without an forward slashes. So I tried that and it wasn't working either.</p> <p>Here's the VisualBasic code that has come out of all of this, it's exactly the same but using some variables rather than our set values that I've been using for testing.</p> <pre><code>DoCmd.RunSQL ("UPDATE tblJob SET tblJob.InvoiceNo = '" &amp; newInvoiceNo &amp; "' WHERE tblJob.CustomerNo = '" &amp; VbCustNo &amp; "' AND (tblJob.FinishDate BETWEEN cdate(format('" &amp; Forms![frmMainMenu][txtFirstDate] &amp; "', '##/##/####')) AND cdate(format('" &amp; Forms![frmMainmenu][txtEndDate] &amp; "', '##/##/####')));") </code></pre> <p>We had a look at: <a href="https://stackoverflow.com/questions/1397232/convert-a-string-to-a-date-in-access">Convert a string to a date in Access</a> and it helped us realize that it was cdate(format()) rather than TO_DATE as it is in Oracle. But we just can't seem to get it to run properly, any help would be much appreciated.</p>
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    1. USElliot Blackburn
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    1. COif your dates are in mm/dd/yyyy format you can just use the # character such as BETWEEN #08/09/2013# AND #03/10/2013# Access will see this as a Date
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    2. CO@engineersmky Thanks, but we're using dd/mm/yyyy though, I'm guessing it's not going to work in the same way?
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      1. POUpdating a field dependent on a date range in Access with VisualBasic and SQL
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    3. COyou can always use `DateSerial` which is `DateSerial(Year,Month,Day)` So like `DateSerial(Right([YourDate],4),Mid([YourDate],3,2),Left([YourDate],2)`. this will return a date object in the correct format. This is how I handle properly formatted string dates.
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