/// <summary>
        /// 此处去掉主键,即插入操作不能操作id
        /// </summary>
        /// <param name="tuple"></param>
        /// <returns></returns>
        private String GetInsertSql(Tuple <List <String>, List <String> > tuple)
        {
            String        pk     = EntityTableMapper.GetPkColumn(typeof(T));
            StringBuilder colstr = new StringBuilder();
            StringBuilder valstr = new StringBuilder();
            List <String> cols   = tuple.Item1;
            List <String> props  = tuple.Item2;

            for (Int32 i = 0; i < cols.Count; i++)
            {
                //去掉主键
                if (cols[i] == pk)
                {
                    continue;
                }
                if (colstr.Length != 0)
                {
                    colstr.Append(",");
                    valstr.Append(",");
                }
                colstr.Append(cols[i]);
                valstr.Append($"@{props[i]}");
            }
            return($"({colstr.ToString()}) values ({valstr.ToString()})");
        }
        private String GetUpdateSql(Tuple <List <String>, List <String> > tuple)
        {
            String        pk     = EntityTableMapper.GetPkColumn(typeof(T));
            StringBuilder colstr = new StringBuilder();
            List <String> cols   = tuple.Item1;
            List <String> props  = tuple.Item2;

            for (Int32 i = 0; i < cols.Count; i++)
            {
                //去掉主键
                if (cols[i] == pk)
                {
                    continue;
                }
                if (colstr.Length != 0)
                {
                    colstr.Append(",");
                }
                // synctimes = synctimes+1 的形式便直接拼接
                //注意,此处在解析header时候,便是1:1的关系,如果是set中便是为空
                if (String.IsNullOrEmpty(props[i]))
                {
                    colstr.Append($" {cols[i]} ");
                }
                else
                {
                    colstr.Append($"{cols[i]} = @{props[i]}");
                }
            }
            return(colstr.ToString());
        }
        private void SetNoneWhere(Type t)
        {
            String pk = EntityTableMapper.GetPkColumn(t);

            if (String.IsNullOrEmpty(pk))
            {
                throw new ArgumentException("请使用带主键的或者添加删选条件");
            }
            String pkValue = ValuePairs[pk].ColumnName;
            ColumnRelevanceMapper column = new ColumnRelevanceMapper();

            column.ColumnName = pk;
            column.TableName  = t;
            ColumnRelevanceMapper value = new ColumnRelevanceMapper();

            value.ColumnName      = pk;
            value.SqlOperatorEnum = SqlOperatorEnum.Equal;
            Reduce.AddWhere(column);
            Reduce.AddWhere(value);
        }