如何比较前几行的日期并更新 SQL 服务器中的条目

Question

我一直在努力尝试通过比较前几行的日期来找到更新某些条目的方法。

这是 table 中存储的日期示例我愿意更新：

ContractId  PartnerId   DocumentState   DealsDate   ActualCloseDate
-------------------------------------------------------------------
119577922   1450216     38              2016-04-21  2017-08-01
222138372   1450216     38              2017-11-22  2019-04-01
223328932   1450216     38              2018-07-30  2018-11-19
224263667   1450216     38              2019-01-15  2019-04-19
225286013   1450216     38              2019-06-21  2019-07-19
225704493   1450216     38              2019-08-30  2019-12-11

目标是将所有 ContractId 的 DocumentState 更改为 36，因为它之前的任何条目的 ActualCloseDate 大于其 DealsDate.

输出应如下所示：

ContractId  PartnerId   DocumentState   DealsDate   ActualCloseDate
-------------------------------------------------------------------     
119577922   1450216     38              2016-04-21  2017-08-01
222138372   1450216     38              2017-11-22  2019-04-01
223328932   1450216     36              2018-07-30  2018-11-19
224263667   1450216     36              2019-01-15  2019-04-19
225286013   1450216     38              2019-06-21  2019-07-19
225704493   1450216     38              2019-08-30  2019-12-11

下面是将数据插入临时文件的代码 table。

create table #Test 
(
     ContractId int, 
     PartnerId int, 
     DocumentState int, 
     DeasDate datetime, 
     ActualCloseDate datetime
)

insert into #Test (ContractId, PartnerId, DocumentState, DealsDate, ActualCloseDate) values (119577922, 1450216, 38, '2016-04-21', 2017-08-01')
insert into #Test (ContractId, PartnerId, DocumentState, DealsDate, ActualCloseDate) values (222138372, 1450216, 38, '2017-11-22', 2019-04-01')
insert into #Test (ContractId, PartnerId, DocumentState, DealsDate, ActualCloseDate) values (223328932, 1450216, 38, '2018-07-30', 2018-11-19')
insert into #Test (ContractId, PartnerId, DocumentState, DealsDate, ActualCloseDate) values (224263667, 1450216, 38, '2019-01-15', 2019-04-19')
insert into #Test (ContractId, PartnerId, DocumentState, DealsDate, ActualCloseDate) values (225286013, 1450216, 38, '2019-06-21', 2019-07-19')
insert into #Test (ContractId, PartnerId, DocumentState, DealsDate, ActualCloseDate) values (225704493, 1450216, 38, '2019-08-30', 2019-12-11')

提前致谢！

干杯，

Answer 1

我认为可更新的 CTE 可以满足您的需求：

with toupdate as (
      select t.*,
             max(ActualCloseDate) over (partition by PartnerId
                                        order by dealsDate
                                        rows between unbounded preceding and 1 preceding
                                       ) as prev_max_acd
      from #test t
     )
update toupdate
     set documentstate = 36
     where prev_max_acd > dealsdate;

Here 是一个 db<>fiddle

Answer 2

你可以试试这个

update Test set DocumentState = 36
where exists (
    select * from Test inrTest
    where inrTest.ContractId < Test.ContractId
    and inrTest.ActualCloseDate > Test.DealsDate
)

如果订单不在"ContractId"，那么只需将合约id条件更改为您想要订购的列

如何比较前几行的日期并更新 SQL 服务器中的条目

How to compare dates from previous rows and update entries in SQL Server

sql

sql-server

ssms

ssms-2016