Solved

error

Posted on 2008-10-16
16
169 Views
Last Modified: 2012-05-05
I have a data set which I need to count the monthly entries. For example

Jan-08   1
Feb-08   2
Mar-08   3

To do this I have put together some code which like this;

SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY RIGHT([Rdate], 4), CAST(LEFT([Rdate], CHARINDEX('-', [Rdate]) - 1) AS INT)

However I am getting a error message which looks like this;

Invalid lenght passed to SUBSTRING function.

I am not sure what is wrong?
0
Comment
Question by:Mr_Shaw
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 5
  • 5
  • +1
16 Comments
 
LVL 60

Expert Comment

by:chapmandew
ID: 22731179
try this:

SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY RIGHT([Rdate], 4), CAST(LEFT([Rdate],
case when CHARINDEX('-', [Rdate]) - 1) >= 2 then CHARINDEX('-', [Rdate]) - 1)  else 0 end
AS INT)
0
 
LVL 37

Expert Comment

by:momi_sabag
ID: 22731182
it means the length you pass to the left / right functions is illegal
0
 
LVL 6

Expert Comment

by:mirzas
ID: 22731199
Try this:



SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY [Rdate]

0
Get free NFR key for Veeam Availability Suite 9.5

Veeam is happy to provide a free NFR license (1 year, 2 sockets) to all certified IT Pros. The license allows for the non-production use of Veeam Availability Suite v9.5 in your home lab, without any feature limitations. It works for both VMware and Hyper-V environments

 

Author Comment

by:Mr_Shaw
ID: 22731406
I used the code

SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY RIGHT([Rdate], 4), CAST(LEFT([Rdate],
case when CHARINDEX('-', [Rdate]) - 1) >= 2 then CHARINDEX('-', [Rdate]) - 1)  else 0 end
AS INT)

I am getting the following error

An expression of non-boolean type specified in a context where a condition is expected, near ')'

Not sure what that really means?
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 22731462
whoops....try this:

SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY RIGHT([Rdate], 4),
CAST(LEFT([Rdate],
case when CHARINDEX('-', [Rdate]) >= 2 then CHARINDEX('-', [Rdate])-1  else 0 end)
AS INT)
0
 
LVL 6

Expert Comment

by:mirzas
ID: 22731479
The query I sent you does not work?
0
 

Author Comment

by:Mr_Shaw
ID: 22731542
Thanks the code work,

However things are not being grouped together properly. An example of my results are;

Month           Rs
1-2007      2
5-2007      1
5-2007      1
5-2007      1
6-2007      1

As you can see 5-2007 has three seperate entries.

0
 
LVL 6

Expert Comment

by:mirzas
ID: 22731572
Try this



SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month
0
 
LVL 6

Expert Comment

by:mirzas
ID: 22731579
whoops...
this one.. sorry.

SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY [Rdate]
ORDER BY CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20))
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 22731623
no problem

SELECT     CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20)) AS Month, COUNT([Rdate]) AS Rs
FROM         table1
GROUP BY CAST(MONTH([Rdate]) AS VarChar(20)) + '-' + CAST(YEAR([Rdate]) AS VarChar(20))
ORDER BY RIGHT([Rdate], 4),
CAST(LEFT([Rdate],
case when CHARINDEX('-', [Rdate]) >= 2 then CHARINDEX('-', [Rdate])-1  else 0 end)
AS INT)
0
 

Author Comment

by:Mr_Shaw
ID: 22731706
This code still does not group the months together
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 22731758
mine does.
0
 
LVL 6

Accepted Solution

by:
mirzas earned 500 total points
ID: 22731862
SELECT CAST(YEAR([Rdate]) AS VarChar(20)) + '-' + CAST(MONTH([Rdate]) AS VarChar(20)) AS Month, Count(*)  from
table1
GROUP BY CAST(YEAR([Rdate]) AS VarChar(20)) + '-' + CAST(MONTH([Rdate]) AS VarChar(20))
ORDER BY CAST(YEAR([Rdate]) AS VarChar(20)) + '-' + CAST(MONTH([Rdate]) AS VarChar(20))


This one works fine.
0
 

Author Comment

by:Mr_Shaw
ID: 22731873
I am now getting an aggregation error saying that Rdate is not part of order by or group by
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 22731929
try this:

select MonthVal, count(*)
from
(
SELECT  CAST(MONTH([Rdate]) AS VarChar(20)) + '-'
        + CAST(YEAR([Rdate]) AS VarChar(20)) AS MonthVal,
RIGHT([Rdate], 4),
        CAST(LEFT([Rdate],
                  case when CHARINDEX('-', [Rdate]) >= 2
                       then CHARINDEX('-', [Rdate]) - 1
                       else 0
                  end) AS INT) AS OrderByCol, RDate
FROM    table1
) a
GROUP BY MonthVal
ORDER BY MIN(OrderByCol)
0
 

Author Closing Comment

by:Mr_Shaw
ID: 31506744
Thanks, it worked fine :)
0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
Recently we ran in to an issue while running some SQL jobs where we were trying to process the cubes.  We got an error saying failure stating 'NT SERVICE\SQLSERVERAGENT does not have access to Analysis Services. So this is a way to automate that wit…
Familiarize people with the process of utilizing SQL Server functions from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Ac…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.

623 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question