👀 Views: 1384 💬 Answers: 1 📅 Created: 2025-06-06

VBA SQL ADODB ErrorHandling

I've been researching this but I've hit a wall trying to I am using VBA (Excel 2016) to pull data from an SQL database and I often run into issues with data types when using the `Variant` type to store the results..... For instance, when querying a table that includes `NULL` values or a mix of data types (like `VARCHAR` and `INT`), the following code snippet causes an behavior: ```vba Dim con As Object Dim rs As Object Dim sqlQuery As String Set con = CreateObject("ADODB.Connection") Set rs = CreateObject("ADODB.Recordset") con.Open "Provider=SQLOLEDB;Data Source=MyServer;Initial Catalog=MyDB;User ID=myUsername;Password=myPassword;" sqlQuery = "SELECT * FROM MyTable" rs.Open sqlQuery, con Dim rowData As Variant rowData = rs.GetRows() ``` When I try to iterate through `rowData`, I receive a type mismatch behavior, especially when accessing cells that have `NULL` values. I have tried checking for `IsNull()` before assigning the data, but this has not resolved the scenario. Here's how I'm currently iterating: ```vba Dim i As Long Dim j As Long For i = LBound(rowData, 2) To UBound(rowData, 2) For j = LBound(rowData, 1) To UBound(rowData, 1) If IsNull(rowData(j, i)) Then Debug.Print "Row "; i; " Column "; j; " is NULL" Else Debug.Print "Row "; i; " Column "; j; ": "; rowData(j, i) End If Next j Next i ``` The behavior occurs on the line where I am trying to access `rowData(j, i)`. How can I handle the potential type issues better when using `Variant` and ensure I don't run into runtime errors due to unexpected data types? Are there best practices for handling mixed data types in VBA when interacting with SQL databases? I'm developing on Linux with Vba.