更新多行与批量插入一样

时间:2015-07-31 05:10:05

标签: c# mysql vb.net sql-update

我正在使用以下方案进行批量插入。

Dim queryBuilder As New StringBuilder
queryBuilder.Append("Insert into myTable(col1,col2)values")
Dim loopFlag As Boolean = False
For i As Integer = 0 To 150
  queryBuilder.Append("(" & i & ",'" & i & "th Value'),")
Next
If loopFlag Then
  ' call method to execute the query'
   ExecuteQuery(RemoveTrailingComma(queryBuilder.ToString()))
End If

在我的整个项目中,我们经常使用这些技术进行批量插入。是否有任何类似的批量更新方式?我已经引用了这些链接,但它们与我的方案不匹配

1 个答案:

答案 0 :(得分:0)

答案就在参考链接本身。再次完全关注,或试试这个:

  queryBuilder.Append("ON DUPLICATE KEY UPDATE col2 = VALUES(col2)")

因此您的整个代码将如下所示:

    Dim queryBuilder As New StringBuilder
    queryBuilder.Append("Insert into myTable(col1,col2)values")
    Dim loopFlag As Boolean = False
    For i As Integer = 0 To 150
        queryBuilder.Append("(" & i & ",'" & i & "th Value'),")
    Next
    Dim mySql As String = RemoveTrailingComma(queryBuilder.ToString()) & "ON DUPLICATE KEY UPDATE col2 = VALUES(col2)"
    If loopFlag Then
        ExecuteQuery(mySql)
    End If