Question

请帮我搞清楚这个。所以我试图在表单中的标签中显示具有相同值的记录数。

SELECT Status_ , COUNT(Status_) FROM ISSUANCE WHERE Status_ = 'Draft' GROUP BY Status_

我该如何显示？谢谢。

    Dim disconn As New SqlConnection("Server = EURIZZE-PC;Database = INTERTRANS;Integrated Security = SSPI;")
    Dim DataSet2 As New DataSet


    Dim sqlcon As String = "SELECT ISSUANCE.Status_ , COUNT(Status_) FROM ISSUANCE WHERE Status_ = 'Draft' GROUP BY Status_"
    Dim sqlda As New SqlDataAdapter(sql, thisConnection)

    da.Fill(DataSet1, "ISSUANCE")
    NameLabel1.DataBindings.Add("text", DataSet1, "") 'So I am having trouble on how to display it. Because the rowcount is not a permanent column.

Answer 1

可能会使用case表达式更改您的查询，例如

SELECT Status_ , 
SUM(CASE WHEN Status_ = 'Draft' THEN 1 ELSE 0 END) AS NewSum
FROM ISSUANCE 
GROUP BY Status_;

Answer 2

你在使用win-forms吗？你这里没有提供太多信息......

Label newlabel = new Label();
newlabel.Text = ""; // <- put your query-result in here

Answer 3

尝试以下方法

$watch

将具有相同值的行数显示为标签

3 个答案: