为什么这个 LAG() Window 函数 returns "The Order by clause is invalid"

Question

编辑 #1：添加了期望的结果

Warehouse   ID  Code    QtyIn   QtyOut  BalanceAfter Previous_BlncAfter
MainWh  1   100001  10000   0   10000   0
MainWh  3   100001  0   5000    5000    10000
MainWh  6   100001  3500    0   8500    5000
MainWh  9   100001  0   1500    7000    8500
MainWh  2   100003  15000   0   15000   0
MainWh  4   100003  0   7000    8000    15000
MainWh  7   100003  2200    0   10200   8000
MainWh  10  100003  0   1200    9000    10200
MainWh  5   100005  2500    0   2500    0
MainWh  8   100005  1000    0   3500    2500
MainWh  11  100005  0   1000    2500    3500

我正在尝试执行此查询以从 select 查询中获取先前的 BalanceAfter，准备使用当前的 QtyIn 和 QtyOut 进行计算：

with Tr As (
select 
  DocDtls.Warehouse, Transactions.Code, DocDtls.zDate, 
  Transactions.ID, Transactions.QtyIn, Transactions.QtyOut, Transactions.BalanceAfter
FROM DocDtls 
JOIN Transactions ON DocDtls.[DocNum] = Transactions.[DocNum]
ORDER BY DocDtls.Warehouse, Transactions.Code, DocDtls.zDate, Transactions.ID
)
select ID,Code,QtyIn,QtyOut,BalanceAfter,
  Lag(BalanceAfter,1,0) Over (order by Code)Prev_BlncAfter 
from Tr;

但是我得到这个错误

The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP, OFFSET or FOR XML is also specified.

第一个 Order by 是必不可少的，LAG 取决于它，所以我需要保持原样。我搜索了一个解决方案，但我无法让它工作，谢谢

Answer 1

尝试以下修改后的查询，看看是否适合您？

with Tr as (
    select 
        d.Warehouse, t.Code, d.zDate, 
        t.ID, t.QtyIn, t.QtyOut, t.BalanceAfter
    from DocDtls d
    join Transactions t on d.DocNum = t.DocNum
)
select ID, Code, QtyIn, QtyOut, BalanceAfter,
  Lag(BalanceAfter,1,0) over (partition by Warehouse, Code order by Id) Prev_BlncAfter 
from Tr;

为什么这个 LAG() Window 函数 returns "The Order by clause is invalid"

Why this LAG() Window function returns "The Order by clause is invalid"

sql

sql-server

sql-order-by