/// <summary>
        /// 添加SQL Having查询语句并返回当前SQL语句创建类
        /// </summary>
        /// <param name="condition">Having条件语句</param>
        /// <returns>当前SQL语句创建类</returns>
        internal SqlCommandBuilder AppendHaving(ISqlCondition condition)
        {
            if (condition != null)
            {
                this._stringBuilder.Append("HAVING ").Append(condition.ToString()).Append(' ');
            }

            return(this);
        }
        /// <summary>
        /// 添加SQL Where查询语句并返回当前SQL语句创建类
        /// </summary>
        /// <param name="condition">Where条件语句</param>
        /// <returns>当前SQL语句创建类</returns>
        internal SqlCommandBuilder AppendWhere(ISqlCondition condition)
        {
            if (condition != null)
            {
                this._stringBuilder.Append("WHERE ").Append(condition.ToString()).Append(' ');
            }

            return(this);
        }
        /// <summary>
        /// 添加SQL Having查询语句并返回当前SQL语句创建类
        /// </summary>
        /// <param name="condition">Having条件语句</param>
        /// <returns>当前SQL语句创建类</returns>
        internal SqlCommandBuilder AppendHaving(ISqlCondition condition)
        {
            if (condition != null)
            {
                this._stringBuilder.Append("HAVING ").Append(condition.ToString()).Append(' ');
            }

            return this;
        }
        /// <summary>
        /// 添加SQL Where查询语句并返回当前SQL语句创建类
        /// </summary>
        /// <param name="condition">Where条件语句</param>
        /// <returns>当前SQL语句创建类</returns>
        internal SqlCommandBuilder AppendWhere(ISqlCondition condition)
        {
            if (condition != null)
            {
                this._stringBuilder.Append("WHERE ").Append(condition.ToString()).Append(' ');
            }

            return this;
        }