ms-access

问题 I'm REALLY new to SQL and I'm really struggling with all but the simplest of joins - especially in MS Access. At this stage, all I want to do is create a query from two tables: 'tblUsers', with columns 'UserID' and 'User', and 'tblPayments' with columns 'PaymentID', 'User' and 'Authoriser'. I want my query to contain all of this data and also to have columns 'UserID' and 'AuthoriserID', both of these ID numbers being taken from 'tblUsers', but clearly one will relate to the User and one to

问题 I read data from MS Access using C#. But get the OleDbException trying to execute such query: SELECT * FROM Flats WHERE Flats.VersionStamp <= [theDate] AND Flats.Flat=[theFlat] OleDbException: Data type mismatch in criteria expression. On the other side, any one of the following queries works fine: SELECT * FROM Flats WHERE Flats.VersionStamp <= [theDate] AND Flats.Flat=1 SELECT * FROM Flats WHERE Flats.VersionStamp <= #1/1/2009# AND Flats.Flat=[theFlat] The C# code stays the same all the

问题 I work with an Inventory System. I have an error on my code, it says No value given for one or more required parameters. and the error was thrown to cmd.ExecuteNonQuery() . What does it mean? can someone help me? By the way this code is for deducting Item Quantity on Database. Sorry for my bad English. con.Open() Dim sqlQry As String = "UPDATE [tbl_Stocks] SET [Quantity] = [Quantity] - @QU WHERE Products='" & lbPro.Text & "'" Using cmd As New OleDbCommand(sqlQry, con) cmd.Parameters

问题 I have to connect Supertype Entity Called Users ( User_ID (PK) , User_Password , Registration_Date , .. etc ) . to Each one of the following entities : Employees ( Employee_ID (PK) , Fname , Lname , Birthdate .. etc ) Customers ( Customers_ID (PK) , Fname , Lname , Birthdate .. etc ) Suppliers( Supplier_ID (PK) , Fname , Lname , Birthdate .. etc ) .. How To Do It ( For relational database ) Using Ms-Access ? 回答1: There are generally 3 strategies for representing inheritance in the relational

问题 I have a Microsoft SQL Server database which is updated with data regularly. I would like to store this database with all tables (and preferrably relationsships) to a new Microsoft Access (.accdb) file using C#. SQL Management Studio is installed on the system so I think one solution could be to invoke BCP (http://msdn.microsoft.com/en-us/library/ms162802.aspx) from the code, but I haven't figured out how to use it correctly in this case. I guess there are much better ways doing it without

问题 I am new using Access and trying to change this query: SELECT DateDiff("d", [Invoice]![TxnDate],[ReceivePaymentLine]![TxnDate]) AS ActualPaymentDays, IIF ([ActualPaymentDays] < 90, 0.10, IIF ([ActualPaymentDays] < 120, 0.09, IID ([ActualPaymentDays] , 365, 0.05, 0))) AS PayPerValue FROM ReceivePaymentLine INNER JOIN Invoice ON ReceivePaymentLine.AppliedToTxnTxnID = Invoice.TxnID I make "ActualPaymentDaysRate" table: ActualPaymentDay1 PayPerValue1 ActualPaymentDay2 PayPerValue2

问题 I have built a macro already that moves values inside about 10 different tables from one database to another. It takes a unique identifier so say columns "nid" and checks to see if it already exists in the new database, if there is no match it moves the data if there is a match and it already exists it doesn't. This macro is working fine however, I would like it to check if the value already exists and if it does to check each column for any changes and if there are changes to the value's to

问题 I am trying to insert a row into a table (userGames), using Ucanaccess, and, when executing the statement, am recieving the following error: Feb 10, 2015 8:29:02 PM db.Connect update SEVERE: null net.ucanaccess.jdbc.UcanaccessSQLException: unknown token: at net.ucanaccess.jdbc.UcanaccessStatement.execute(UcanaccessStatement.java:145) at db.Connect.update(Connect.java:42) at db.GameScanner.searchGames(GameScanner.java:99) at db.GameScanner.<init>(GameScanner.java:91) at db.WelcomeGUI

问题 I am trying to insert a row into a table (userGames), using Ucanaccess, and, when executing the statement, am recieving the following error: Feb 10, 2015 8:29:02 PM db.Connect update SEVERE: null net.ucanaccess.jdbc.UcanaccessSQLException: unknown token: at net.ucanaccess.jdbc.UcanaccessStatement.execute(UcanaccessStatement.java:145) at db.Connect.update(Connect.java:42) at db.GameScanner.searchGames(GameScanner.java:99) at db.GameScanner.<init>(GameScanner.java:91) at db.WelcomeGUI

问题 I am taken over support on a VB.Net WinForms application and the company that I am doing the support for has lost the source code for the application. I have the installation CD for the application and the installation steps for a network install are: Copy the access database for the application to a location on the server. Create a share on the folder that contains the database and give Everyone full access. Install the application on the client desktops via a ClickOnce installation. The