Ntext Versus Nvarchar
Feb 19, 2008
Hi,
my question concerns both desktop and device apps.
I'm using sql compact to store some data. I often have to store strings (descriptions, url, etc.) but I don't know when to use nvarchar or ntext.
Nvarchar needs to have a size limit, but I often set it to 8092 when I don't know the actual limit (urls can be very long !).
I fear Ntext because I suppose there is performances impact.
Is there any "rules" to help to choose which data type I'd use ?
Thanks,
Steve
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Apr 4, 2007
Like in the subject: What are the cons and pros of using nvarchar(max) versus ntext?
Does it have something to do with having to enable full text search perhaps in the latter case?
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Nov 28, 2007
I am running this query to an sql server 2000 database from my aspcode:"select * from MyTable whereMySqlServerRemoveStressFunction(MyNtextColumn) = '" &MyAdoRemoveStressFunction(MyString) & "'"The problem is that the replace function doesn't work with the ntextdatatype (so as to replace the stresses with an empty string). I hadto implement the MySqlServerRemoveStressFunction, i.e. a function thattakes a column name as a parameter and returns the text contained inthis column having replaced some letters of the text (the letters withstress). Unfortunately, I could not do that because user-definedfunctions cannot return a value of ntext.So I have the following idea:"select * from MyTable whereCheckIfTheyAreEqualIngoringTheStesses(MyNtextColum n, '" & MyString &"')"How can I implement the CheckIfTheyAreEqualIngoringTheStessesfunction? (I don't know how to combine these functions to do what Iwant: TEXTPTR, UPDATETEXT, WRITETEXT, READTEXT)
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Oct 10, 2007
I have table with a field defined as nvarchar. I want to change it to varchar. I have a stored procedure which defines the parameter @strCall_desc as nvarchar(4000). Are there going to be ay problems with running this sp if I just change the field type as described.
TIA
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Sep 27, 2005
I am new to SQL Server and would like to hear opinions on pros and cons of using nText vs. nVarChar data type for following uses:
URLs (up to 260 bytes)
Addresses (50-300 bytes)
Descriptions and comments (50-2,000 bytes)
Memos (up to 8000 bytes)
TIA.
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Feb 6, 2007
Hello,
I need to save some news text in an SQL table. The text can be long.
1. Should I use nvarchar(MAX) or nText?
2. And what is the difference between nText and Text?
I am using SQL 2005.
Thanks,
Miguel
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Feb 15, 2008
Dear All,
i'm trying to convert the datatype from ntext to nvarchar.i'm getting error. is it not possible?
Vinod
Even you learn 1%, Learn it with 100% confidence.
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May 24, 2006
I just move our SQL server to version 2005. In new version ntext field is deprecated and documentation says that ntext(max) should be used.
If I have table Table1 and ntext column Column1. When I execute following SQL statements:
alter table Table1 alter column
Column1 nvarchar(max)
go
1.) Are out of row data automatically move to in row?
2.) Or should I also execute something like this ?
update Table1 set Column1 = Column1+'' where Column1 is not null
3.) Is there way to check if data is stored out or in row?
Best regards
edvin
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Jan 22, 2005
I need to sort by an ntext field, but it won't let me do it.
However, if I cast the field as nvarchar(100), I can use ORDER BY on that.
Is there any reason that this is a bad idea? In my testing, ordering by a converted ntext field was actually *faster* than ordering by an nvarchar (same data in the fields).
Josh
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Jan 28, 2004
Hi all
I have a table that contains an ntext column for storing values up to a couple of Mb in size.
However, I estimate that 95% of the values stored in this ntext field will fit into an nvarchar(4000) field.
Is it worth me having both fields in the table?
i.e. For rows where the values < 4000 characters I would store the value in the nvarchar column. Otherwise I would use the ntext column.
Can anyone confirm whether this technique would increase performance given that ntext values are sort of stored separately to the rest of the table data?
A colleague of mine is an Oracle DBA and he mentioned this technique is fairly caommonly adopted in the Oracle world.
Thanks
Matt
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Apr 10, 2008
When I tried to insert armenian by doing the following
insert into tablex (field1) values (N'testdata')
it does not display in query analyzer or in the database as armenian.
When I copy this to word it does not convert it.
What else am I supposed to do to get that information to redisplay the correct way and I would appreciate any tutorials or samples you can show or direct me to.
Howard
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Jul 10, 2006
I have a hungarian character which looks like a lower case o with two single quotes on top of it --> Å‘
I have this character stored in two table the datatype of the column where this is stored at is varchar in one table and nvarchar in the other. When I try to view the field in enterprise manager the character appears as it should in the 2 tables, but when I use a jsp page deployed on weblogic to look at this character the one stored in the column of type varchar displays perfectly, but the table in which the column is nvarchar the character on the jsp page appears as a Q instead.
Any inputs on how to correct this issue will be much appreciated. Any changes to the character set on the html / jsp pages has no affect on the result.
Thanks,
Manisha
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Oct 19, 2006
I have a live SQL 2005 database that has ntext fields, when the ntext fields go over 4000 chars the record can no longer be edited. It throws a string or binary data would be truncated error. I tried turning text in row OFF, but it did not work. Can anyone forsee any problems with changing the ntext fields to nvarchar(max) in the live database? Also, I came across sp_tableoption N'MyTable', 'large value types out of row', 'ON', does this work for ntext also? sp_tableoption N'MyTable', 'text in row', 'OFF' did not do anything.Any help would be appreciated.
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Jul 23, 2005
Hi all,I need to store data into about 104 columns. This is problematic with MSSQL, since it doesn't support rows over 8kb in total size.Most of the columns are of type NVARCHAR(255), which means we can't havemore than 8092/(255*2) = 15 columns of this type.With a row length of more than 8kb, SQL gives a warning that any rows overthat amount will be truncated.So far I'm seeing two possible solutions to this problem:1. Split data into multiple tables with the same ID column accross alltables, and then join them on SELECT statements.2. Use NTEXT instead of NVARCHAR. NTEXT's length is 16 bytes because itcontains a pointer to the actual value stored somewhere else. However, NTEXTdoesn't support regular indexing, only through a Full-Text Index catalog. Inthis case I'll need to user "WHERE CONTAINS(columnName, 'sometext')" toperform searches, which is bearable.I'm inclined toward #2. However I haven't used Full-Text indices before anddon't know their limitations. Will I run into problems with NTEXT? Is therea better solution?Thanks.-Oleg.
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Oct 2, 2007
I hope this is the right forum for this question, my apologies in advance if it isn't....
We have a web based CGI product (written in C++ VS 6) that uses ODBC and takes text from a submitted web page and stores it in a SQL Server table in a field of type "ntext". The user in question is copying and pasting this text from an MS Word 2003 document. After the initial save our app errors out trying to access the table it just wrote to, and when we look in the table we see that up to **200 carriage returns** have been mysteriously inserted into the ntext field!! (Our product has been out in the field with no such problem for several years, so we are thinking it's related to something specific the customer is doing - perhaps with using MS Word for the source text.) We have tried but cannot duplicate the problem, but the customer sees it with each attempt to modify the table in question. The only thing that I see out of the ordinary is that the field in question is of type "ntext" - which supports unicode, instead of nvarchar. Does any of this ring a bell for anybody? I'm thinking of changing the field type to nvarchar to see if that solves the problem.
Thanks, Steve Bradbery
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Dec 14, 2004
I want to retrieve data from SQL containing non English character but fail, can anyone shed me some light?
What I use currently:
Dim strSQL As String
strSQL = "SELECT ArticleID, "
strSQL &= "ISNULL(Body, '') AS Body, "
strSQL &= "ISNULL(Subject, '') AS Subject "
strSQL &= "FROM Articles "
strSQL &= "WHERE (Subject LIKE N'%' + @Keyword + '%' OR [Body] LIKE N'%' + @Keyword + '%') "
Dim con As New SqlConnection(ConfigurationSettings.AppSettings("ConnectionString"))
Dim cmd As New SqlDataAdapter(strSQL, con)
cmd.SelectCommand.Parameters.Add("@Keyword", SqlDbType.NVarChar).Value = keyword
...
I'm not so sure where should I place the letter "N", I use :
SELECT ArticleID,
ISNULL(Body, '') AS Body,
ISNULL(Subject, '') AS Subject,
FROM Articles
WHERE (Subject LIKE N'%SomeNonEnglishString%' OR [Body] LIKE N'%SomeNonEnglishString%')
in Query Analzyer, it works! But it failed in my program... oh my god...
Thanks a lot!
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Jan 28, 2005
Hi,
We are in process of converting all of the data type of the fields from CHAR/VARCHAR/TEXT into NCHAR/NVARCHAR/NTEXT (DBCS). Having more than 900 store procedure its look like real pain to make modification in all of the SPs.
After failed to find any help from GOOGLE, I am posting this request. I am basically looking for any automated tool which are convert data type in SP based on the field of the table used in the SP. Or at least which can provide me some sort of list which can helpful for doing manual reactoring.
PLEASE HELP ME!!!
Thanks,
Firoz Ansari
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Mar 27, 2004
/* INFO USED HERE WAS TAKEN FROM http://support.microsoft.com/default.aspx?scid=kb;en-us;262499 */
DECLARE @X VARCHAR(10)
DECLARE @ParmDefinition NVARCHAR(500)
DECLARE @Num_Members SMALLINT
SELECT @X = 'x.dbo.v_NumberofMembers'
DECLARE @SQLString AS VARCHAR(500)
SET @SQLString = 'SELECT @Num_MembersOUT=Num_Members FROM @DB'
SET @ParmDefinition = '@Num_MembersOUT SMALLINT OUTPUT'
EXECUTE sp_executesql <-LINE 11
@SQLString,
@ParmDefinition,
@DB = @X,
@Num_MembersOUT = @Num_Members OUTPUT
Just Need Help On This Error
Server: Msg 214, Level 16, State 2, Procedure sp_executesql, Line 11
Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'.
I dont know why im getting a errrror b/c I followed http://support.microsoft.com/default.aspx?scid=kb;en-us;262499 exactly
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Jan 10, 2008
HI, I am running the below method which returns this error: The parameterized query '(@contactdate nvarchar(4000),@dnbnumber nvarchar(4000),@prospect' expects the parameter '@futureopportunity', which was not supplied" Please help.Private Shared Sub InsertData(ByVal sourceTable As System.Data.DataTable, ByVal destConnection As SqlConnection)
' old method: Lots of INSERT statements Dim rowscopied As Integer = 0
' first, create the insert command that we will call over and over:
destConnection.Open()Using ins As New SqlCommand("INSERT INTO [tblAppointmentDisposition] ([contactdate], [dnbnumber], [prospectname], [businessofficer], [phonemeeting], [followupcalldate2], [phonemeetingappt], [followupcalldate3], [appointmentdate], [appointmentlocation], [appointmentkept], [applicationgenerated], [applicationgenerated2], [applicationgenerated3], [comments], [newaccount], [futureopportunity]) VALUES (@contactdate, @dnbnumber, @prospectname, @businessofficer, @phonemeeting, @followupcalldate2, @phonemeetingappt, @followupcalldate3, @appointmentdate, @appointmentlocation, @appointmentkept, @applicationgenerated, @applicationgenerated2, @applicationgenerated3, @comments, @newaccount, @futureopportunity)", destConnection)
ins.CommandType = CommandType.Textins.Parameters.Add("@contactdate", SqlDbType.NVarChar)
ins.Parameters.Add("@dnbnumber", SqlDbType.NVarChar)ins.Parameters.Add("@prospectname", SqlDbType.Text)
ins.Parameters.Add("@businessofficer", SqlDbType.NChar)ins.Parameters.Add("@phonemeeting", SqlDbType.NVarChar)
ins.Parameters.Add("@followupcalldate2", SqlDbType.NVarChar)ins.Parameters.Add("@phonemeetingappt", SqlDbType.NVarChar)
ins.Parameters.Add("@followupcalldate3", SqlDbType.NVarChar)ins.Parameters.Add("@appointmentdate", SqlDbType.NVarChar)
ins.Parameters.Add("@appointmentlocation", SqlDbType.NVarChar)ins.Parameters.Add("@appointmentkept", SqlDbType.NVarChar)
ins.Parameters.Add("@applicationgenerated", SqlDbType.NVarChar)ins.Parameters.Add("@applicationgenerated2", SqlDbType.NVarChar)
ins.Parameters.Add("@applicationgenerated3", SqlDbType.NVarChar)ins.Parameters.Add("@comments", SqlDbType.Text)
ins.Parameters.Add("@newaccount", SqlDbType.NVarChar)ins.Parameters.Add("@futureopportunity", SqlDbType.NVarChar)
' and now, do the work: For Each r As DataRow In sourceTable.RowsFor i As Integer = 0 To 15
ins.Parameters(i).Value = r(i)
Next
ins.ExecuteNonQuery()
'If System.Threading.Interlocked.Increment(rowscopied) Mod 10000 = 0 Then
'Console.WriteLine("-- copied {0} rows.", rowscopied)
'End If
Next
End Using
destConnection.Close()
End Sub
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Sep 4, 2007
I had this question for quite a long time.
It seems the latter one don't take any extra storage space than the previous one.
As long as the real string length is less than 10.
Is that mean the latter one not cost anything?
I once heard the different is when they are in memory. But not sure of it.
Can anyone explain it and provide some official reference on it?
Thank.
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Apr 13, 2006
I'm sorry to be ignorant on this point. It seems trivial, but what's the difference between @@ and @ when using variables in T-SQL? I have a developer that always uses @@ for local variables and @ for reference variables (meaning variables declared as parameters for a stored procedure or function).
Is that purely stylistic? Is it a holdover from some previous version? Or is it a legitimate best practice that I've not seen before?
My google-shui is weak today; I found nothing when searching.
Regards,
hmscott
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Feb 21, 2007
Do you need SP1 installed before installing SP2?
http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/servicepacks/sp2.mspx
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Apr 13, 2007
Hi everybody. I am just confused. What is the difference between SQL SP1 and SP2 ? Can anyone explain further to me.
Thanks.
-Ron-
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Jan 30, 2004
I have two tables :
tableA
a_id (int)
value (varchar 255)
tableB
id (int)
a_id (int)
b_id (int)
c_id (int)
d_id (int)
Both these tables contain considerable amounts of rows, but over time tableA will end up containing orphaned values (i.e. the a_id is not used in tableB) and this problem cannot be rectified by setting, for example, cascade deletes.
To fix this problem I decided to write a simple stored procedure to purge all values in tableA where its a_id is not used in tableB :
DELETE FROM tableA WHERE a_id NOT IN (SELECT a_id FROM tableB)
Now although the following document relates to postgres :
http://archives.postgresql.org/pgsql-sql/2003-12/msg00174.php
I was interested to find out if I should be wary of using NOT IN in my query.
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Feb 12, 2007
Hello,
I have an Output parameter as follows:
@Feedback INT OUTPUT
I want to give it a value and return it.
What is the difference between using:
SELECT @Feedback = -1
RETURN @Feedback
And
SET @Feedback = -2
RETURN @Feedback
Thanks,
Miguel
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Jun 20, 2007
Hello,
I wonder if anyone else out there has the same impression that I have: I find that DTS works much better than SSIS.
I find that DTS is so easy to use and reliable: it gets the job done and fast! On the other hand, SSIS seems to be so needlessly complex that it takes hours of troubleshooting just to get it to work, and sometimes it doesn't work at all. For example I have just spent hours trying to get SSIS to import a flat file with 300,000 rows. It just crashes and doesn't even give an error message so that one can fix it. On the other hand I have just now successfully accomplished the same task with DTS and it took me 5 minutes!
I honestly don't see a valid reason for using SQL Server 2005 instead of 2000. So far it's much more productive to use 2000.
I hope Microsoft can clarify this issue.
Regards,
Jerome Smith
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Jan 4, 2006
Hi All,
Any suggestions / views / help on below question would be welcomed.
I am building an asp.net 2.0 application with sql 2005 express as back end. My back end has 3 major tables which are:
tblArticles - saves basic info on articles posted by user (like articleid, title, short desc, rating, views, etc)
tblCategories - saves various categories and their hierarchies (id, parented, name, etc)
tblArticleCategories - saves info on which articles fall in which categories (like articleid, categoryid)
as of now, i am caching all rows from the first 2 tables, but i am in a bit of doubt for caching the third table (tblArticleCategories), although data in this table wont change very often and also this table will just have 2 columns and not many rows as well and this is a good target for caching,
but the reason I am in a bit of doubt to cache this table is, when my website visitor clicks on any category link in the category tree view, I need to use an inner join across all these 3 tables to locate and return all articles found in that particular category.
But I can do the same thing without hitting the database as I already have 2 of the required 3 tables in my cache, I can simply add the third table to my cache and then using the dataview objects rowfilter property on these 3 cached tables, I can very well get the appropriate results.
But I wonder which of the 2 methods would you prefer and suggest, I mean do you feel that just to save hits against the database, I am going to far and doing a lot of crap using the dataview (which might not be as efficient as sql engine) or you feel that the inefficiency of the dataview will still win compared to the cost of hitting the database for this
Thanks in advance, bye take care
Raj Chaudhari, Mumbai, India (MCAD.NET)
www.xtremebiz.biz
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Feb 16, 2006
Hello all,
I have table 'statistics' which holds information about another table, i.e. number of rows belonging to each user.
Would I be better off using a trigger after each insert to increment a certain row.
Or would I be better off selecting the data by means of an sql statement and updating the column whenever the statisitcs page is requested.
Does sql provide any methods which allow a column to count other rows or columns?
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Oct 25, 2000
Hi all,
Anyone here ever used the Informix database and can give me some differences between Informix and SQL.
One of our users is thinking about purchasing a COTS product that only supports an Informix database. I need to convince the user to evaluate other rival applications that can support SQL and need some arguments in favor of not going with Informix.
Any ideas appreciated,
Faustina
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Jun 21, 1999
We currently use CA ArcServe (ArcServe 6.5 Enterprise and Single Server Editions) to backup our Windows NT files and MS-SQL Server databases. We have experienced significant reliability issues with ArcServe. Many times we have found ourselves rebuilding a corrupt ArcServe Job (ArcServe’s backup schedule) database. One of our NT server occasionally NT bug checks when ArcServe is performing backups. Occasionally ArcServe Jobs incorrectly reschedule themselves. Sometimes the Jobs do not complete but stay executing, not performing any work, and to cancel them may require a lot of effort. The ArcServe job DB repair utility generally does not work. The user interface is lacking. For example, the job scheduling options are very limited. CA tech support for this product has been poor. Because we have issues with ArcServe stability we are now evaluating Veritas (formally Seagate) Backup Exec for NT. What are other people’s experiences with these 2 products?
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Jun 25, 2004
I gotta network tech that I work with from time to time. Hes gonna migrate a access database over to sql. He says it should be easy its a flat file can just do it through enterprise manager. I warned him that datatypes can become an issue (kinda have to know your db) he looked at me like I'm an idiot and proceeded to migrate the tables over to sql...Needless to say he got alot of error messages and is now totally confused. Now let me ask some experts who really Know Databases, do you ever have problems with Network Techs who think they know all
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Dec 7, 2005
We are planning hardware purchases (more is better). One of our databases is 131 gigs in size and has 45 gigs of 'space available'. I'm not a very experienced SQL Server person, but this seems like quite a bit of 'space available'
1) Is there a way to regulate the amount of 'space available'?
2) are there any rules of thumb for how 'space available' there should be?
Appreciate any feedback or help.
Ray
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Dec 14, 2006
Hi all,
we are about to purchase new database servers and have been offered a good deal on 64-bit Xeon machines. At present we run SQL 2000 on Windows Server 2003 both of which are 32-bit versions.
Is there any problem using our current 32-bit Server software on the 64-bit machines (apart from not being able to utilise its full power)? I'm assuming the SQL 2005 licenses are the same price regardless of 32-bit or 64-bit version. If we buy a 64-bit SQL Server version license are we going to get the best out of it on a 32-bit Windows Server edition?
tia - Matt
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