Access :: How To Calculate A Logical Value In SQL Query
Jan 6, 2010
In MS Access I can write a query like this (where ClassA, ClassB, etc, are boolean fields):
SELECT [ClassA] Or [ClassB] Or [ClassF] AS HasPrints, EntrySummary.EntrantID, EntrySummary.CompID, EntrySummary.ClassA, EntrySummary.ClassB, EntrySummary.ClassC, EntrySummary.ClassD, EntrySummary.ClassE, EntrySummary.ClassF
FROM EntrySummary;
However that method of deriving a calculated HasPrints value is not acceptable in ASP.NET. How can I rewrite my query in a standard SQL query format?
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Oct 4, 2010
I'm currently develop a monitoring and evaluation database with many indicators
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Output_indicatorID formular
Vehicle Car + truck
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I search on Google and find some Math parse like: muParser, bcnet but it just for a string
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Jan 12, 2011
I am using below query to count a particular column data based on single condition.
[code].....
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Dec 30, 2010
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Jan 21, 2010
why I get the following error: Query input must contain at least one table or query
for this code...
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Aug 6, 2010
I used following code,
[Code]....
In my database....
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Mar 25, 2010
Can a query output made in MS ACCESS be accessed as a database in Visual Studio 2008?
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Jun 7, 2010
i am new to asp.net programming i am trying to connect asp.net web application with ms access 2007 database. i have taken with two text boxes and when i enter some data in it and press submit button the data must load in access db i created with same fields.
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[code]....
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Jun 9, 2010
I have a data type mismatch while inserting into a number field in an access database using a parameterized query.I think this should be pretty simple but I am still learning a lot.
[Code]....
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Feb 21, 2011
I'm writing a web service that needs to query an Access 2003 database (.mdb). I've found the following code in doing some research on OLEDB connections and queries:
[Code]....
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Jan 6, 2010
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[code]....
[Code]....
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Apr 4, 2010
I executed the following sql command, and got error "Operation must use an updateable query.".
[Code]....
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I have data in a db. I can get to this data through a data source. However when I review values into a data control (GridView, FormView... etc.) I am unable to get to the values in the data controls logically. How do I reference these values? Is there a better way than using data controls?
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I need to embed one Access app in a asp.net app. (open mdb/mde file from asp.net) There are may queries including crosstab queies and reports in Access app.
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Dec 31, 2010
Need to do a summary report of two items, sales and commissions by sales person, by date range. There are only a handful of salespeople. I messed around with SELECT SUM() for a few hours last night. It works easily, up until you need to do a few table joins, to say join on employee id to pull in names. Then it starts getting pretty convoluted, fairly quickly. Question is, is there maybe an easier way of doing this in asp.net than through the sql? It is Access, so I don't think LINQ will work, right? Just wondering if there isn't a quick, easy way of doing this that I don't know about.
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Oct 2, 2010
I've managed to use my MS Access database with repeaters and gridviews in my website. Basically, printing the result of a query directly to the website seems easy enough using something like this :
[Code]....
After quite a bit of googling this seems to be a common way to do this. My question then seems kinda silly.
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Mar 12, 2010
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[Code]....
and am getting this error. Both contact_information and temp_contact_information are tables. The subquery
[Code]....
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[Code]....
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Jun 15, 2010
im using an access database with less than 50.000 records on a single table, no relations.
ive put the following code inside a two for cycles as per the respective variables (i, j) the connection is opened outside the outer cycle and closed after it, im holding the connection open to save up on open/close time and im using OleDB thinking it would be faster than ODBC. The ds fill operation takes nearly 3 seconds in debug mode, the total process will require almost 4 hours. How is it possible to speed it up?
[Code]....
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Apr 19, 2010
I have an access MDB database of latitude and longitude coordinates (x,y). I also have a function in VB similar to:
Public Function Distance (x1,y1,x2,y2) as Double
'Some code here
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Using ASP.NET Visual Basic and a MS Access MDB
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Jan 25, 2011
am a bit unsure of the best way to go about this. I have a form where data is entered, date ranges, usernames, passwords etc and when the button is pressed on the form it searches a database and returns values which match the values entered.I can't think of the most efficient way to do this, could anyone give some pointers on where to start?I thought perhaps of writing a query and then just putting in the variables which pick up the entered values and reading it all in as one big string something like:
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Jun 16, 2010
I'm using Access 2007 for a project and I'm trying to run the following parameterized query:
string sql = "DELETE * FROM participants WHERE participant_id = @participant_id"
OleDbCommand command = DataAccess.NewCommand(sql);
command.Parameters.Add("participant_id", 1);
command.ExecuteNonQuery();
The really weird thing is that it will work if I hard code the value:
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Jan 8, 2010
i have a problem executing an insert query. whenever i try to insert i have an exeption telling me it cant execute because a record needed in another table; where i select a value form that other table according a listbox, and then insert it into this table. here is a sample of my code:
OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=|DataDirectory|emp2.mdb");
int a = 0;
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string sqlcmd = "select id from nationality where descreption = '" + DropDownList1.Text + "'";
OleDbCommand readNatCmd = new OleDbCommand(sqlcmd, conn);
OleDbDataReader readerNat = readNatCmd.ExecuteReader();
while (readerNat.Read())
{
a = readerNat.GetInt32(0);
}
readerNat.Close();
conn.Close();
string saveEmpcmd = @"insert into employee " + "(nationality) " + "values (@nationality)";
OleDbCommand objCmd = new OleDbCommand(saveEmpcmd, conn);
objCmd.Parameters.AddWithValue("@nationality", a);
conn.Open();
objCmd.ExecuteNonQuery();
conn.Close();
now, the form executes with no errors, but it catches an exeption caused by the ExecuteNonQuery funtion; here it is in details:
System.Data.OleDb.OleDbException: You cannot add or change a record because a related record is required in table 'nationality'. at System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr) at System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS
dbParams, Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) at System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior
behavior, String method) at System.Data.OleDb.OleDbCommand.ExecuteNonQuery() at Default2.Button1_Click(Object sender, EventArgs e) in c:Documents and SettingsAdministratorMy DocumentsVisual Studio 2005WebSitesempDefault2.aspx.cs:line 305
when i remove the relation between the tables, the exeption isnt catched anymore, but the value stored in the employee table is 0 how can i solve this?
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Nov 6, 2010
I have a GridView where I am displaying the students List who ware absent for "ASP.Net Class" If Teacher 1 login then it is displying all the records who ware absent and same for remaining teachers. I want to display those records where TecherId matched..
I wrote query like this :
Select StudName FROM Class where Status LIKE 'ABSENT' AND Teacher Id =?
But every teachers(User) are getting everyone's data....
I am using AccessDataSource and displying in GridView....
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Jan 11, 2010
I am building a page which has to search an access table with the text input entered by the user. The thing that is puzzling to me is that the functionality works only when a '%' is explicitly added to the text input at the begginning and end.
If I add '%' programattically in the code behind file, it does not work.
code snippet ( asp page):
<asp:AccessDataSource ID="AccessDataSourcex" runat="server"
DataFile="~/App_Data/company.mdb"
SelectCommand="SELECT [ID], [emp name] AS emp_name, [emp title] AS emp_title FROM [EmpMain] WHERE ([emp name] like [code]...
//the below line is of no use, the % char has to be in the text input
//txtSearch.Text = "%" + txtSearch.Text + "%";
GridView1.DataBind(); <---- this works fine
<--- this does not work, even if I add % chars programatically..
My question is: why does it not work when I programattically add the '%' chars to the search string..
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