How to import table structures and data from Microsoft Access to Visual FoxPro

Summary

This article illustrates how to programmatically create table structures that correspond to tables in Microsoft Access Master Data Base (MDB) files. This article also illustrates how to copy the data in Microsoft Access tables to Visual FoxPro tables.

More Information

In situations where developers want to copy data from Microsoft Access tables to Visual FoxPro tables, the SQLTABLES, AFIELDS, and SQLEXECfunctions may be used to:

  • Retrieve information regarding the number of tables contained in the MDB file.
  • Retrieve the names of tables in the MDB file.
  • Retrieve the structure of each of the tables contained in the MDB file.
  • Create tables that correspond to the structures of the identified tables.
  • Copy data from Microsoft Access tables to Visual FoxPro tables.
The following code snippet illustrates the process of copying data from Microsoft Access tables and information from the MDB file into Visual FoxPro tables. The code sample browses the Table_name field of the SQLResult cursor.
LOCAL lcMyFile, lnConnHandle, lnResult, lcSQLCommand, lnGetData, lcNewName
LOCAL ARRAY laWhatErr(1)

lcMyFile = GETFILE('MDB')

*!* No point if no MDB file is selected
IF !EMPTY(lcMyFile)
*!* Use a SQLStringConnect to connect to the MDB file
lnConnHandle = ;
SQLSTRINGCONNECT('DRIVER=MICROSOFT ACCESS DRIVER (*.MDB);DBQ=' + ;
lcMyFile)

IF lnConnHandle > 0
*!* Need to know what tables are contained in the MDB file
lnResult = SQLTABLES(lnConnHandle, 'TABLE')

IF lnResult > 0
*!* Create a new DBC named "MYNEW"
CREATE DATABASE mynew
*!* Select SQLResult and scan through the cursor.
SELECT SQLResult
SCAN
*!* Build a SQL SELECT statement to pass to SQLEXEC()
lcSQLCommand = ;
"SELECT * FROM [" + ALLTRIM(SQLResult.table_name) + "]"

lnGetData = SQLEXEC(lnConnHandle, lcSQLCommand, 'newdata')
IF lnGetData > 0
*!* SQLEXEC() was successful
lcNewName = STRTRAN(ALLTRIM(SQLResult.table_name), " ", "_")

SELECT newdata
*!* Copy Table Structure and Data to a DBF file
*!* VFP 3.0 - loses long field names
*!* COPY TO (lcNewName)
*!* ADD TABLE (lcNewName)
*!* VFP 5.0/6.0 - keeps long field names
COPY TO (lcNewName) DATABASE myNew
ENDIF
ENDSCAN
ENDIF
*!* Done Getting Data, so Disconnect
=SQLDISCONNECT(lnConnHandle)
ELSE
*!* The SQLStringConnect failed
=MESSAGEBOX('ODBC Connection Failed', MB_ICONEXCLAMATION, 'ODBC')
*!* Call AERROR()
=AERROR(laWhatErr)
*!* Display the error
DISPLAY MEMORY LIKE laWhatErr
ENDIF
ENDIF

BROWSE FIELDS table_name
(c) Microsoft Corporation 2000, All Rights Reserved. Contributions by John Desch, Microsoft Corporation.

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Article ID: 260405 - Last Review: Jun 20, 2008 - Revision: 1

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