有用還需要研究的SQL語句

SELECT CAST(scope_identity() AS int)






在SqlCommand.ExcuteScalar()內加入

static public int AddProductCategory(string newName, string connString)
{
    Int32 newProdID = 0;

    string sql = "INSERT INTO   Production.ProductCategory (Name) VALUES (@Name); "
        + "SELECT CAST(scope_identity() AS int)"; //在這裏使用
using (SqlConnection conn = new SqlConnection(connString))
   {
        SqlCommand cmd = new SqlCommand(sql, conn);

        cmd.Parameters.Add("@Name", SqlDbType.VarChar);

        cmd.Parameters["@name"].Value = newName;

        try
        {
            conn.Open();

            newProdID = (Int32)cmd.ExecuteScalar(); //在這裏返回新插入一行的ID
        }

        catch
 (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }

    return (int)newProdID;
}



關於 SCOPE_IDENTITY 的介紹





關於OBJECT_ID:http://msdn.microsoft.com/zh-cn/library/ms190328.aspx   ,還有，這個N是什麼意思？

IF OBJECT_ID (N
'
dbo.AWBuildVersion', N'
U') IS NOT NULL