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Code: Select all

Sub Dbconnection()
    Dim cn As ADODB.Connection
    Set cn = New ADODB.Connection
    Dim rs As New ADODB.Connection
    Dim strConn As String
    Dim sqlStr As String
    strConn = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};" & _
    "DBQ=C:\Users\Macbook Air\Desktop\ADODB.Connection2\Database.xlsx; ReadOnly=False;"
    cn.Open strConn
    sqlStr = "SELECT * FROM [Sheet1$A1:B50]"
    rs.Open sqlStr, strConn
    ActiveSheet.Range("A4").CopyFromRecordset rs
    rs.Close
    cn.Close
    Set cn = Nothing
    MsgBox "connected!"
End Sub

Code: Select all

Sub Dbconnection()
   'Other code
    Dim rs As New ADODB.Recordset '<~~ declare rs as recordset
   'Other code
    sqlStr = "SELECT * FROM [Sheet1$]" '<~~ select data from [sheet1$]
   'Other code
End Sub

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sqlStr = "SELECT * FROM [Sheet1$] WHERE EmpName = Sheets("sheet1").Range("A3").value"

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sqlStr = "SELECT * FROM [Sheet1$] WHERE EmpName ='" & Sheets("sheet1").Range("A3").Value & "'"