vba mysql update多字段_vba操作Mysql使用UPDATE一次更新多组数据
網上查到綜合后確定的update語法范例:
UPDATE mytable SET myfield = CASE WHEN 1 THEN ‘value‘ WHEN 2 THEN ‘value‘ WHEN 3 THEN ‘value‘ END WHERE id IN (1,2,3)
下面是我寫的一個通用的update庫表內容過程:kku為庫表,zd為字段,frow為更新值表頭空行數,col為更新值所在列,ygs為員工數量。
注:更新字符和數字寫法有所不同,因此用IsNumeric(Cells(1 + frow, col))進行了判斷。
功能:可以把表在一列數據,寫入表的一個字段。寫入值數量可控的通用過程。
Sub writeb(kku As String, zd As String, frow As Integer, col As Integer, ygs As Integer)
psw = "123456"
ku = "kp123"
user = "user123"
ip = "127.0.0.1"
Dim Cnn As New ADODB.Connection
Dim rs As New ADODB.Recordset
Dim a As String
a = "DRIVER={MySQL ODBC 5.3 Unicode Driver};SERVER=" & ip & ";Database=" & ku & ";Uid=" & user & ";Pwd=" & psw & ";Stmt=set names gb2312"
Set Cnn = CreateObject("ADODB.Connection")
Cnn.ConnectionString = a
Cnn.Open
Set rs = CreateObject("ADODB.recordset")
rs.CursorType = adOpenStatic? ?‘設置游標類型,否則無法獲得行數
rs.CursorLocation = adUseClient? ?‘設置游標屬性,否則無法獲得行數
rr = "(1"? ? ‘用rr存入id的范圍,用qq存入條件和賦值,首先給rr和qq賦個初值(即id為1時的值)
If IsNumeric(Cells(1 + frow, col)) Then
qq = "when id=1 then " & Cells(1 + frow, col)? ? ?‘更新的是數字
Else
qq = "when id=1 then ‘" & Cells(1 + frow, col) & "‘"? ? ? ‘更新的為字符串,必須單引號引住
End If
For i = 2 To ygs
rr = rr & "," & i
If IsNumeric(Cells(i + frow, col)) Then
qq = qq + " when id=" & i & " then " & Cells(i + frow, col)
Else
qq = qq + " when id=" & i & " then ‘" & Cells(i + frow, col) & "‘"
End If
Next
rr = rr & ")"
rs.Open "update " & kku & " set " & zd & " = case " & qq & " end where id in " & rr & ";", Cnn, 3, 1
Cnn.Close
Set Cnn = Nothing
End Sub
總結
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