SQl交叉数据透视查询错误

Question

Using SQL Server 2008 Management Studio:

I have the following cross tab query I'm currently creating, this is what I have so far.

CREATE TABLE #Months
(UserID int,
ModuleID int,
Passed bit,
Name nvarchar(255),
Company nvarchar(50),
LanguageID nvarchar(10),
CodeRegisteredWith nvarchar(50),
TotalLoggedInDuration int,
Region int,
IsAdmin bit,
IsRep bit,
IsRetailer bit,
IsTeamLeader bit,
dateregistered date,
total int,
usertotal int,
complete int,
January int, february int, march int, april int, may int, June int, July int,
August int, September int, October int, November int, December int)

SELECT
   [1] January,
   [2] February,
   [3] March,
   [4] April,
   [5] May,
   [6] June,
   [7] July,
   [8] August,
   [9] September,
   [10] October,
   [11] November,
   [12] December
   FROM
(
  SELECT DATEADD(MONTH,0,Convert(smalldatetime,[dateregistered],120))as months
  FROM #Temp WITH(NOLOCK)
) d
pivot 
(
   SUM(complete)
   for months in ([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])
) p 

This query is meant to populate 12 new fields (months) with "passed" data:

So in theory you have 12 columns one record each cell will have a sum of how many users passed in that month.

But I'm currently adding and testing as this is part of a massive stored procedure using virtual tables. when I run this procedure all the others work but this fails and complains:

Msg 8114, Level 16, State 1, Procedure GRAPHMainQuery, Line 127
Error converting data type nvarchar to smalldatetime.
Msg 473, Level 16, State 1, Procedure GRAPHMainQuery, Line 127
The incorrect value "1" is supplied in the PIVOT operator.

Nvarchar to smalldatetime? I've already stored this as a date in my #table, I'm even using convert() I just don't understand why this is complaining?

Answer 1

Use

MONTH(Convert(datetime,[dateregistered],120)) as months

to get the month number (returns an integer). DATEADD(...) returns a datetime/smalldatetime value, which can not be compared to the [1]...[12] month number columns in the PIVOT statement.