[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:11bbbe0d-0533-425d-ab86-ac9de25c4f94
[En]
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:22a2854f-1d69-4411-a860-25864586838f
维护历史状态，以及最新状态数据的一种表，拉链表根据拉链粒度的不同，实际上相当于快照，只不过做了优化，去除了一部分不变的记录，通过拉链表可以很方便的还原出拉链时点的客户记录。
这里用商品价格的变化作为例子，具体的开发过程要按实际的来，不能照搬代码，编程重要的是了解背后的思路和原理，而不是ctrl+c和ctrl+v。那对我们学习提升的帮助有限，虽然可能对完成工作的效率帮助很大。
在开始介绍之前，这里的数据仓库的环境是HIVE。
首先看看原始的数据:
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:f38fb92f-c88e-4750-8067-c88954ae3d44
[En]
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:f7920e47-9f8a-4407-a03b-adf782997899
我们这里的思路是这样的，将最新的商品记录插入历史拉链表中，然后我们通过HIVE的窗口行数，按照end_date排序，然后分别取下一条的sale_price和end_date，然后再判断本条的价格和下一条的价格是否相等，如果是一样的，那么就把end_date改为下一条的end_date,最后做去重处理，然后就得到我们想要的数据了。
说了这么多，我觉得还是把sql贴出来会好一些，代码是最好的语言。
talk is cheap,show me the code。
-- 商品原始表这里取名goods_table
select spu_id,
min(start_date) as start_date,
end_date as end_date,
sale_price
from
(select spu_id,
start_date,
if(sale_price = lead_sale_price,lead_end_date,end_date) as end_date,
sale_price
from
( select spu_id,
start_date,
end_date,
sale_price,
lead(sale_price,1,null) over(partition by spu_id order by end_date) as lead_sale_price,
lead(end_date) over(partition by spu_id order by end_date) as lead_end_date
from goods_table ) t) t
group by spu_id,
end_date,
sale_price ;
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:2fef9b7d-859a-4d02-a32c-c8e40e2d87cd
[En]
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:e6de7761-dee0-4a69-8161-6f8edfae5f8d
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:d3b4b808-6203-40b2-bc17-0f656b21d749
[En]
[TencentCloudSDKException] code:FailedOperation.ServiceIsolate message:service is stopped due to arrears, please recharge your account in Tencent Cloud requestId:8892b0f4-c96f-44cc-8144-a95d0d25e2cd
参考文章：数据仓库(10)数仓拉链表开发实例
Original: https://www.cnblogs.com/the-pig-of-zf/p/16230544.html
Author: 张飞的猪
Title: 数据仓库(10)数仓拉链表开发实例
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