Question

有DDL

CREATE TABLE #ServiceChange(
    [ID] [int] identity(1,1),
    [comp] [char](2) NOT NULL,
    [date] [numeric](8, 0) NOT NULL,
    [custid] [numeric](7, 0) NOT NULL,
    [service] [char](35) NOT NULL,
    [type] [char](1) NOT NULL,
    [amount] [numeric](9, 2) NOT NULL,
    [custname] [char](30) NOT NULL,
    [GROUPID] [char](2) NULL
)

以下链接中的原始和欲望数据

https://www.dropbox.com/sh/bpapxquaae9aa13/AADnan31ZASublDjN7sa2Vvza

我想知道如何使用SQL Server 2012根据某些条件修改当前和下一条记录的一列？

标准是：

Type should always flow F->T
if current abs(amount)> next abs(amount) then groupid = 'PD'
if current abs(amount)< next abs(amount) then groupid = 'PI'
there is no case when those amounts will be equals
where current(custid) = next(custid)  and current(service) = next(service)  and groupid is null

任何帮助都将非常感激。

谢谢

Answer 1

未找到Custid，服务和金额。没有下一个的定义。
这假设接下来基于ID

update table 
   set t1.groupid = 'PD', t1.type = 'f', t2.type = 't'
  from table t1  
  join table t2 
    on t2.id = t1.id + 1 
   and abs(t1.amount) > abs(t2.amount) 
   and t1.groupid  is null 
   and t1.cusid = t2.custid 
   and t2.service = t2.service 


update table 
   set t1.groupid = 'PI'
  from table t1  
  join table t2 
    on t2.id = t1.id + 1 
   and abs(t1.amount) < abs(t2.amount) 
   ...

如何根据某些标准修改当前和下一条记录的一列？

1 个答案: