Why Is My VBA Connection to MySQL Database in Excel Failing and How Do I Fix It?

Troubleshooting VBA Connection to MySQL Database in Excel

The question arises when attempting to connect to a MySQL database using VBA in Excel but encountering an error. Here's an in-depth investigation and solution to the issue based on the provided code snippet.

Problem Analysis:

The faulting line identified in the VBA code is:

oConn.Open str

This line is responsible for establishing a connection to the MySQL database using the connection string stored in the str variable. An error occurs during this step, preventing the connection from being established.

Root Cause and Solution:

Comparing the provided VBA code to the successful PHP connection, one crucial difference becomes apparent: the inclusion of the CONNECTDB() subroutine in the VBA code. This subroutine is where the connection to the database should be initialized, as seen in the corrected code provided in the solution.

The corrected VBA code below addresses the issue and should successfully connect to the MySQL database:

Private Sub ConnectDB()
    Set oConn = New ADODB.Connection
    Dim str As String
    str = "DRIVER={MySQL ODBC 5.2.2 Driver};" & _
                                        "SERVER=sql100.xtreemhost.com;" & _
                                        "PORT=3306" & _
                                        "DATABASE=xth_9595110_MyNotes;" & _
                                        "UID=xth_9595110;" & _
                                        "PWD=myPassword;" & _
                                        "Option=3"
    oConn.Open str
End Sub

Private Sub InsertData()
    Dim rs As ADODB.Recordset
    Set rs = New ADODB.Recordset
    ConnectDB
    sql = "SELECT * FROM ComputingNotesTable"
    rs.Open sql, oConn, adOpenDynamic, adLockOptimistic
    Do Until rs.EOF
        Range("A1").Select
        ActiveCell = rs.Fields("Headings")
        rs.MoveNext
    Loop
    rs.Close
    oConn.Close
    Set oConn = Nothing
    Set rs = Nothing
End Sub

The updated code ensures that the connection to the MySQL database is established before attempting to execute the SQL query and retrieve data. By following these steps, you should be able to successfully connect to your MySQL database using VBA in Excel.

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