Asp.net 在表中插入多个唯一行

我对SQL不太熟悉。我试图将多行数据插入到一个表中，如果businessfilterprase列中存在具有重复值的行，则不插入。我写了一个我认为应该是的伪代码

if (filterCategoryList != null)
{
   foreach (KeyValuePair<string, int> filter in filterCategoryList)
   {
      cmd.CommandText = "insert into tblBusinessName (BusinessFilterPhrase,BusinessCategoryID)" +
                        "select @BusinessFilterPhrase,@BusinessCategoryID" +
                        "from tblBusinessName as t1" +
                        "where NOT EXISTS" +
                        "( select * from tblBusinessName as d1 where d1.BusinessFilterPhrase = @BusinessFilterPhrase) ";

      cmd.Parameters.AddWithValue("@BusinessFilterPhrase", filter.Key);
      cmd.Parameters.AddWithValue("@BusinessCategoryID", filter.Value.ToString());

      cmd.ExecuteNonQuery();
   }
}

---

您的代码看起来是正确的。我会这样写：

insert into tblBusinessName(BusinessFilterPhrase, BusinessCategoryID)
    select @BusinessFilterPhrase, @BusinessCategoryID
    from tblBusinessName t1
    where NOT EXISTS (select 1
                      from tblBusinessName d1
                      where d1.BusinessFilterPhrase = @BusinessFilterPhrase
                     )

这些变化只是表面上的

编辑：

如果性能是一个问题，请在BusinessFilterPhrase上创建索引：

---

您可以将其设置为唯一索引，如果希望数据库强制执行列的唯一性，则在插入重复值时会生成错误。

是否有其他方法可以更好地扩展查询，如插入500次？例子？加入？

create index idx_tblBusinessName_BusinessFilterPhrase on tblBusinessName(BusinessFilterPhrase);