mySQL + vba，检查表中是否已存在某个项目

Question

我有一个电子表格，用于连接我的mySQL数据库并对该数据库进行更改。我认为我在系统中检查重复项的方式是非常低效的，但我很难想到一种更有效的方法。按项目逐个进行所需的时间并不长，只有100个项目，但它很长，有50,000个项目，而且我试图找到缩短时间的方法过程需要。

在Excel中

'/ Define last row with data in it
lastRow = Range("C" & Rows.Count).End(xlUp).Row

'/ go through each row, line by line, to check if this part number is in the system
For c = 5 To lastRow Step 1

'/ Based on user input, runs a SELECT query to see if the part number in question is already in the table they're trying to upload into
SQLStr = "SELECT quotePartNumber FROM " & table & " where (quotePartNumber, `debitNumber) IN (('" & partNumber & "', '" & debitNum & "')) LIMIT 1"`

rs.Open SQLStr, conn, adOpenStatic
        ' Dump to spreadsheet
        With Worksheets("DATA").Range("N28:N28")
            .ClearContents
'/ copy SQL output to cell N28, then check if an output exists.  If the part exists in the table already, a part number will fill N28, if the part doesn't exist, N28 will be blank.             
.CopyFromRecordset rs
        End With

'/ If the part already exists, delete this part number from the spreadsheet.
        pnCheck = Range("N28").Value
        If pnCheck <> "" Then
            Range(Cells(c, 1), Cells(c, 11)).Select
            Selection.Delete Shift:=xlUp
            deleted = deleted + 1
            c = c - 1
        End If

        '/ reset rs for the next run through
        rs.Close
        Set rs = Nothing
        Range("N28") = ""
        debit = False


next c

所以基本上，我浏览电子表格中的每一行，检查我的表中是否已经存在该部分，如果存在，我将从电子表格中删除该行。一旦列表被削减到表中已经没有的内容，我就上传它（这里没有显示代码......）

是否有更有效的方法可以检查表格中的5,000到100,000个零件号，而不是逐行检查？