在其中一个INSERT语句中，您试图将一个太长的字符串插入到字符串(varchar或nvarchar)列中。

如果仅仅通过查看脚本还不清楚哪个INSERT是违规者，那么可以计算错误消息之前出现的<1行受影响的>行。得到的数字加1就是陈述号。在您的例子中，似乎是第二个INSERT产生了错误。

来自@gmmastros的回答

当您看到消息....时

字符串或二进制数据将被截断

想想自己……字段不够大，容不下我的数据。

检查客户表的表结构。我认为您会发现一个或多个字段的长度不足以容纳您试图插入的数据。例如，如果Phone字段是varchar(8)字段，并且您尝试在其中放入11个字符，则会得到此错误。

我使用了不同的策略，在某些地方分配了8K的字段。这里只使用了大约50/100。

declare @NVPN_list as table 
nvpn            varchar(50)
,nvpn_revision  varchar(5)
,nvpn_iteration INT
,mpn_lifecycle  varchar(30)
,mfr            varchar(100)
,mpn            varchar(50)
,mpn_revision   varchar(5)
,mpn_iteration  INT
-- ...
) INSERT INTO @NVPN_LIST 
SELECT  left(nvpn           ,50)    as nvpn
        ,left(nvpn_revision ,10)    as nvpn_revision
        ,nvpn_iteration
        ,left(mpn_lifecycle ,30)
        ,left(mfr           ,100)
        ,left(mpn           ,50)
        ,left(mpn_revision  ,5)
        ,mpn_iteration
        ,left(mfr_order_num ,50)
FROM [DASHBOARD].[dbo].[mpnAttributes] (NOLOCK) mpna

我想要速度，因为我总共有1M条记录，并加载了28K条记录。

有些数据无法放入数据库列中(小)。要发现哪里有问题并不容易。如果你使用c#和Linq2Sql，你可以列出将被截断的字段:

首先创建helper类:

public class SqlTruncationExceptionWithDetails : ArgumentOutOfRangeException
{
    public SqlTruncationExceptionWithDetails(System.Data.SqlClient.SqlException inner, DataContext context)
        : base(inner.Message + " " + GetSqlTruncationExceptionWithDetailsString(context))
    {
    }

    /// <summary>
    /// PArt of code from following link
    /// http://stackoverflow.com/questions/3666954/string-or-binary-data-would-be-truncated-linq-exception-cant-find-which-fiel
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    static string GetSqlTruncationExceptionWithDetailsString(DataContext context)
    {
        StringBuilder sb = new StringBuilder();

        foreach (object update in context.GetChangeSet().Updates)
        {
            FindLongStrings(update, sb);
        }

        foreach (object insert in context.GetChangeSet().Inserts)
        {
            FindLongStrings(insert, sb);
        }
        return sb.ToString();
    }

    public static void FindLongStrings(object testObject, StringBuilder sb)
    {
        foreach (var propInfo in testObject.GetType().GetProperties())
        {
            foreach (System.Data.Linq.Mapping.ColumnAttribute attribute in propInfo.GetCustomAttributes(typeof(System.Data.Linq.Mapping.ColumnAttribute), true))
            {
                if (attribute.DbType.ToLower().Contains("varchar"))
                {
                    string dbType = attribute.DbType.ToLower();
                    int numberStartIndex = dbType.IndexOf("varchar(") + 8;
                    int numberEndIndex = dbType.IndexOf(")", numberStartIndex);
                    string lengthString = dbType.Substring(numberStartIndex, (numberEndIndex - numberStartIndex));
                    int maxLength = 0;
                    int.TryParse(lengthString, out maxLength);

                    string currentValue = (string)propInfo.GetValue(testObject, null);

                    if (!string.IsNullOrEmpty(currentValue) && maxLength != 0 && currentValue.Length > maxLength)
                    {
                        //string is too long
                        sb.AppendLine(testObject.GetType().Name + "." + propInfo.Name + " " + currentValue + " Max: " + maxLength);
                    }

                }
            }
        }
    }
}

然后为SubmitChanges准备包装器:

public static class DataContextExtensions
{
    public static void SubmitChangesWithDetailException(this DataContext dataContext)
    {
        //http://stackoverflow.com/questions/3666954/string-or-binary-data-would-be-truncated-linq-exception-cant-find-which-fiel
        try
        {
            //this can failed on data truncation
            dataContext.SubmitChanges();
        }       
        catch (SqlException sqlException) //when (sqlException.Message == "String or binary data would be truncated.")
        {

            if (sqlException.Message == "String or binary data would be truncated.") //only for EN windows - if you are running different window language, invoke the sqlException.getMessage on thread with EN culture
                throw new SqlTruncationExceptionWithDetails(sqlException, dataContext);
            else
                throw;
        }
    }
}

准备全局异常处理程序和日志截断细节:

protected void Application_Error(object sender, EventArgs e)
{
    Exception ex = Server.GetLastError();
    string message = ex.Message;
    //TODO - log to file
}

最后使用代码:

Datamodel.SubmitChangesWithDetailException();

2016/2017更新将向您显示坏值和列。

新的跟踪标志将把旧的错误替换为新的2628错误，并打印出出错的列和值。Traceflag 460在2016年和2017年的最新累积更新中可用:

https://support.microsoft.com/en-sg/help/4468101/optional-replacement-for-string-or-binary-data-would-be-truncated

只要确保在你安装了CU之后，你启用了跟踪标志，或者是全局的或者是永久的在服务器上:

.．.或使用DBCC TRACEON:

https://learn.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-traceon-trace-flags-transact-sql?view=sql-server-ver15

在sql server上，你可以像这样使用SET ANSI_WARNINGS OFF:

        using (SqlConnection conn = new SqlConnection("Data Source=XRAYGOAT\\SQLEXPRESS;Initial Catalog='Healthy Care';Integrated Security=True"))
        {
            conn.Open();

            using (var trans = conn.BeginTransaction())
            {
                try
                {
                    using cmd = new SqlCommand("", conn, trans))
                    { 

                    cmd.CommandText = "SET ANSI_WARNINGS OFF";
                    cmd.ExecuteNonQuery();

                    cmd.CommandText = "YOUR INSERT HERE";
                    cmd.ExecuteNonQuery();

                    cmd.Parameters.Clear();

                    cmd.CommandText = "SET ANSI_WARNINGS ON";
                    cmd.ExecuteNonQuery();

                    trans.Commit();
                    }
                }
                catch (Exception)
                {

                    trans.Rollback();
                }

            }

            conn.Close();

        }