Re: Function that replaces ntext and compares ntext with nvarchar
- From: verb13@xxxxxxxxxxx
- Date: Thu, 29 Nov 2007 15:28:56 -0800 (PST)
It is just what I needed. Thanks a lot.
On Nov 29, 12:42 am, Erland Sommarskog <esq...@xxxxxxxxxxxxx> wrote:
(ver...@xxxxxxxxxxx) writes:
I am running this query to an sql server 2000 database from my asp
code:
"select * from MyTable where
MySqlServerRemoveStressFunction(MyNtextColumn) = '" &
MyAdoRemoveStressFunction(MyString) & "'"
The problem is that the replace function doesn't work with the ntext
datatype (so as to replace the stresses with an empty string). I had
to implement the MySqlServerRemoveStressFunction, i.e. a function that
takes a column name as a parameter and returns the text contained in
this column having replaced some letters of the text (the letters with
stress). Unfortunately, I could not do that because user-defined
functions cannot return a value of ntext.
So I have the following idea:
"select * from MyTable where
CheckIfTheyAreEqualIngoringTheStesses(MyNtextColumn, '" & MyString &
"')"
How can I implement the CheckIfTheyAreEqualIngoringTheStesses
function? (I don't know how to combine these functions to do what I
want: TEXTPTR, UPDATETEXT, WRITETEXT, READTEXT)
I will have to admit that I don't really follow what this
CheckIfTheyAreEqualIngoringTheStesses is supposed to achieve. But
there are a lot of problems working with ntext. In SQL 2005 there
is a new data type nvarchar(MAX) which has the same limit as ntext,
but without the limitations.
However, if I understand you right, you want to make an accent-insensitive
comparision, so that "résumé" = "resume". This you can do easily without
any replace business, just use an accent-insentive collation:
SELECT * FROM MyTable
WHERE MyNtextColumn
COLLATE Finnish_Swedish_CI_AI = ?
(As for the question mark, that's an indiciation that you should use
parameterised statements and not interpolate parameters into your SQL
commands.)
Note that Finnish_Swedish_CI_AI is just an example, and you should pick
the CI_AI collation that matches the language(s) you work with.
--
Erland Sommarskog, SQL Server MVP, esq...@xxxxxxxxxxxxx
Books Online for SQL Server 2005 athttp://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/books...
Books Online for SQL Server 2000 athttp://www.microsoft.com/sql/prodinfo/previousversions/books.mspx- Hide quoted text -
- Show quoted text -
.
- References:
- Function that replaces ntext and compares ntext with nvarchar
- From: verb13
- Re: Function that replaces ntext and compares ntext with nvarchar
- From: Erland Sommarskog
- Function that replaces ntext and compares ntext with nvarchar
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