Question

我有以下结构：

    public void changePhoto()
    {
        int MyPhoto;
        if (edit.Text != string.Empty)
        {
            try
            {
                MyPhoto = (int)typeof(Resource.Drawable).GetField(edit.Text).GetValue(null);
            }
            catch
            {
                MyPhoto = Resource.Drawable.ErrorPhoto;
            }
            img.SetImageResource(MyPhoto);
        }
    }
    button.Click += delegate 
    {
        changePhoto();
    };

我一直在努力转换以下查询，而不是选择我想将它们转换为行的列

WordTemplatesByAssemblyPackage
[PackageId] [TemplateId]

WordTemplate
[TemplateId] [Name]

WordTemplatePlainDataMappings
[TemplateId] [UDF01SdtTag] [UDF02SdtTag] [UDF03SdtTag] ... [UDF20SdtTag]

WordTemplateTableDataMappings
[TemplateId] [TableContainerSdtTag] [Col01SdtTag] [Col02SdtTag] ... [Col10SdtTag]

我一直在尝试使用unpiv，但我得到的只是

SELECT
t.Name,
pd.UDF01SdtTag,
pd.UDF02SdtTag,
pd.UDF03SdtTag,
tpd.TableContainerSdtTag,
tpd.Col01SdtTag,
tpd.Col02SdtTag,
tpd.Col03SdtTag

FROM
doc.WordTemplatesByAssemblyPackage AS p
INNER JOIN doc.WordTemplate AS t ON p.TemplateId = t.TemplateId AND p.TemplateId = t.TemplateId
LEFT JOIN doc.WordTemplatePlainDataMappings AS pd ON pd.TemplateId = t.TemplateId AND pd.TemplateId = t.TemplateId
LEFT JOIN doc.WordTemplateTableDataMappings AS tpd ON tpd.TemplateId = t.TemplateId AND tpd.TemplateId = t.TemplateId
WHERE
p.PackageId = 3

最后，我想要实现的结果是这样的：

42000 - [SQL Server]The column 'TemplateId' was specified multiple times for 'unpiv'.
42000 - [SQL Server]The multi-part identifier "p.TemplateId" could not be bound.

Answer 1

看来你正在寻找UNPIVOT运营商

https://technet.microsoft.com/en-us/library/ms177410%28v=sql.105%29.aspx?f=255&MSPPError=-2147217396

在SQL中将列转换为具有联接表的行

1 个答案: