Using DAO to Join Tables of Different Formats

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Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements. The example macro below attaches two tables to a newly created Jet database (Temp.mdb). One table is called Orders and is in the Microsoft Excel format and the other table is called Employee and is in the dBASE IV format.

The dBASE IV file used in this example is the sample file Employee.dbf which is included with Microsoft Query. The default locations for the sample dBASE IV files: To create the Microsoft Excel file used in this example, do the following:

1. In Microsoft Excel, create a new workbook.
2. Enter the following information in cells A1:E3 on Sheet1:

      A1: Order_ID B1: Custmr_ID C1: Employ_ID D1: Order_Date E1: Order_Amt
      A2: 88000    B2: WALNG     C2: '111      D2: 1/1/97     E2: 111.00
      A3: 88001    B3: HIGHG     C3: '333      D3: 1/2/97     E3: 222.00
   						

   NOTE: Include the apostrophe before the numbers in cells C2 and C3 as shown to convert the values to text.
3. Select cells A1:E3 to select the database. On the Insert menu, point to Name, and then click Define. Type Orders, and click OK.
4. Save the workbook as C:\My Documents\Orders.xls.
5. Close the workbook.
6. Create a new workbook.

7. Microsoft Excel 97

   Press ALT+F11 to activate the Visual Basic Editor.
   Click Module on the Insert menu.
   Click References on the Tools menu.
   Select Microsoft DAO 3.5 Object Library and click OK.

   Microsoft Excel 7.0

   Click Module on the Insert menu.
   Click References on the Tools menu.
   Select the Microsoft DAO 3.0 Object Library and click OK.

8. Type the following code on the module sheet:

Sub JoinTables()

Dim db As database
Dim rs As recordset
Dim OrdersTable As tabledef, EmpTable As tabledef

   'Create a temporary Jet database called Temp.MDB
   Set db = createdatabase("C:\My Documents\Temp.mdb", dbLangGeneral)

   'Attach the Excel table "Orders" from the file Orders.xls to the
   'database

   Set OrdersTable = db.CreateTableDef("Orders")
   OrdersTable.Connect = "Excel 5.0;DATABASE=C:\My Documents\ORDERS.XLS"
   OrdersTable.SourceTableName = "Orders"
   db.TableDefs.Append OrdersTable

   'Attach the dBASE IV table "Employee" to the database
   '** Note: You may need to change the path to the sample dBASE
   '   files for your installation of Excel.
   Set EmpTable = db.CreateTableDef("Employee")
   EmpTable.Connect = _
         "dBASE IV;DATABASE=C:\Program Files\Microsoft Office\Office"
   EmpTable.SourceTableName = "Employee"
   db.TableDefs.Append EmpTable

   'Create the recordset -- Return the Order_ID from the Orders
   'table and

   'The First_name and Last_Name from the Employee table where the
   'Employ_ID in the Employee table matches the Employ_ID in the Orders
   'table

   Set rs = db.OpenRecordset("SELECT orders.ORDER_ID, " & _
      "employee.FIRST_NAME, employee.LAST_NAME FROM employee, orders " & _
      "WHERE employee.EMPLOY_ID = orders.EMPLOY_ID", dbOpenDynaset)

   'Copy the recordset to Sheet1!A1

   Sheets("Sheet1").Range("A1").CopyFromRecordset rs

   'Close the database and delete the database file Temp.mdb

   db.Close
   Kill "c:\my documents\temp.mdb"

End Sub