问题
I am receving execution error in following sql script.
Select TOP 1 Percent a.accode,a.voucherdate,a.credit,a.Debit,
SUM(a.Debit) Over (Order By [a.accode],[a.voucherdate] ) as rdr
from VoucherMain as a
Order By a.accode,a.voucherdate
Error Message
Incorrect syntax near 'order'.
Can anyone tell me what's wrong with the script syntext?
回答1:
The problem is that you need SQL Server 2012 and above. Okay, I added the "and above" for future visitors, but compare 2008 OVER CLAUSE with 2012 OVER CLAUSE.
The 2008 version has this important note:
When used in the context of a ranking window function,
<ORDER BY Clause>
can only refer to columns made available by the FROM clause. An integer cannot be specified to represent the position of the name or alias of a column in the select list.<ORDER BY Clause>
cannot be used with aggregate window functions.
回答2:
In SQL Server 2008, you can only use the OVER clause to partition aggregate functions, not apply an order:
Ranking Window Functions < OVER_CLAUSE > :: = OVER ( [ PARTITION BY value_expression , ... [ n ] ] < ORDER BY_Clause> )
Aggregate Window Functions < OVER_CLAUSE > :: = OVER ( [ PARTITION BY value_expression , ... [ n ] ] )
Note that there's no <ORDER BY Clause>
for the aggregates.
来源:https://stackoverflow.com/questions/12686140/issue-with-window-function-in-mssql-2008-r2