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Error selecting text from a SQL database

mageos
12/23/2004 8:49:31 PM

sql server odbc:

Hello,

I have an application that used an access database and I am currently
migrating to SQL Server. The software is designed to use Odbc object
found in the .Net framework version 1.1. I have a simple select
statement that is driving me nuts. It works fine with the Access
databases but dies under SQL Server.

The statement is:
SELECT
settingValue
FROM
tblSettings
WHERE ( owner=@owner and setting=@setting )

settingValue is an ntext field and owner and setting are varchar fields.

When I try to execute the query I get an error:
ERROR [42000][Microsoft][ODBC SQL Server Driver][SQL Server]The text,
ntext, and image data types cannot be compared or sorted, except when
using IS NULL, or LIKE operator.

There are no indexes on any of the fields so I cannot figure out what
the problem is.

Re: Error selecting text from a SQL database

Mike Epprecht (SQL MVP)
12/24/2004 3:46:48 PM

Try this to see if you still get an error:

SELECT
owner,
setting,
settingValue
FROM
tblSettings
WHERE owner = @owner
and setting=@setting

--
--------------------------------
Mike Epprecht, Microsoft SQL Server MVP
Zurich, Switzerland

IM: mike@epprecht.net

MVP Program: http://www.microsoft.com/mvp

Blog: http://www.msmvps.com/epprecht/

[quoted text, click to view]

Re: Error selecting text from a SQL database

JayEs
1/7/2005 5:32:53 PM

[quoted text, click to view]

The error tells you exactly where the problem is. You are trying to do a
compare on an ntext field. Double check your create table statement. I think
you will find that either owner or setting is not of the datatype you
expected. What method of creating the tables in SQL did you use. I find that
often when I let SQL help me out converting data from an outside source, it
comes up with insane assumptions about what the datatype needs to be.

I tried reproducing the error with the script below and it works fine for
me.

create table test(
settingvalue ntext,
owner varchar(5),
setting varchar(5)
)

insert test (settingvalue, owner, setting)
values ('jgdfkjgiugsv8ohyohfef mne hevbe vmnerv', '1', '2')

declare @owner varchar(5)
declare @setting varchar(5)
set @owner = '1'
set @setting ='2'
select * from test where owner = @owner and setting = @setting

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