Pass Chinese Characters into Dynamic SQL Stored Procedure

Posted on 2008-06-17
Last Modified: 2008-06-18
I'm using dynamic sql to execute an update statement via a stored procedure.  I have my exec statement set to NVarChar(4000).  I have my input parameters for the fields that need to be foreign characters set to NVarChar().  I have my DB datatypes set to NVarChar for those columns.  Yet when i pass in chinese characters they end up as ????????? in my DB.

I DO NOT have the same issue with my Insert stored procedure which is not dynamic.  That inserts the foreign characters just fine.

I've attached my code.  I really really want to get this to work as dynamic sql.  
ALTER PROCEDURE [dbo].[UpdateMember] 


	--input parameters

	@MemberID int,

	@MemberNumber varchar(50),

    @Hotel varchar(50),

	@FirstName nvarchar(255),

	@LastName  nvarchar(255),

	@DateofBirth  DateTime,

	@Spouse  varchar(100),

	@NoOfChildren  char(2),

	@Address1  nvarchar(255),

	@Address2  nvarchar(255),

	@City  nvarchar(255),

	@State  nvarchar(255),

	@Country  nvarchar(255),

	@Zip  nvarchar(255),

	@HomePhone  varchar(12),

	@AlternatePhone  varchar(12),

	@Fax  char(10),

	@Email  varchar(50),

	@Pwd  varchar(50),

	@LanguageCode varchar(20) = 'EN',

	@MemberTypeCode varchar(50) = 'CL'





-- this has to be NVarChar to support foreign characters


Declare @SQL NVarChar(4000)

Set @SQL = '

	update	dbo.Members

	set		FirstName = upper( ''' + @FirstName + '''),

			MemberNumber = ''' + @MemberNumber + ''',

			hotel= ''' + @hotel + ''',

			LastName = upper( ''' + @LastName + '''),

			DateOfBirth = ''' + Convert(Varchar(100),@DateOfBirth) + ''',

			Spouse = upper(''' + @Spouse + '''),

			NoOfChildren = ''' + @NoOfChildren + ''',

			Address1 = upper(''' + @Address1 + '''),

			Address2 = upper(''' + @Address2 + '''),

			City = upper(''' + @City + '''),

			State = upper(''' + @State + '''),

			Country = upper(''' + @Country + '''),

			Zip = ''' + @Zip + ''',

			HomePhone = ''' + @HomePhone + ''',

			AlternatePhone = ''' + @AlternatePhone + ''',

			Fax = ''' + @Fax + ''',

			Email = ''' + @Email + ''',

			Pwd = ''' + @Pwd +''',

			LanguageTypeID = (Select LanguageTypeID from dbo.LanguageTypes where Code = ''' + @LanguageCode + '''),

			MemberTypeID = (Select MemberTypeID from dbo.MemberTypes where Code =''' + @MemberTypeCode + ''') '

	If @MemberID <> 0


		Set @SQL = @SQL + '	where MemberID = ' + Convert(varchar(100),@MemberID)




		Set @SQL = @SQL + '	where MemberNumber = ''' + @MemberNumber + ''' '



Open in new window

Question by:davidcahan
  • 3
LVL 15

Expert Comment

ID: 21809853
A Unicode string should be specified with N before the string, like this:

SET @SQL = N'This is Unicode'

SET @SQL = 'This is NOT Unicde'

Even though @SQL is declared as Unicode, it will be doing all the concatenation without Unicode, and then converting it at the end. Try putting N in front of all your strings (like in the above example) to see if that solves it.

LVL 15

Accepted Solution

rob_farley earned 500 total points
ID: 21809876
But... please don't use this method for dynamic SQL. If someone with an apostrophe in their name logs in, they could hurt your system badly.

Search online for SQL Injection and you'll see plenty of information. You could easily fix it just by using sp_executesql with parameters.


Author Comment

ID: 21810214
it worked absolutely PERFECTLY once i used sp_executesql.  even though the syntax is a bit more verbose, in many ways it's a bunch easier.  no more having ot remember to use two or three sets of single apostrophes.  

I'm wondering though: normally when i create dynamic sql, i ofthen use the print statement to debug the sql.  I will pass in all the values for the parameters but instead of execute i do print.  then i copy and paste that into a new query window and debug from there.  how would i accomplish that sort of debugging using sp_executesql?  
LVL 15

Expert Comment

ID: 21810442
Glad to help. Is this marked as answered now then?

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Sending E-mail ASP.Net 3 56
Why don't I see this table in EDMX file? 2 23
How to LOAD up a .NET Framework website with data? 2 40
Tool Box 2 34
In SQL Server, when rows are selected from a table, does it retrieve data in the order in which it is inserted?  Many believe this is the case. Let us try to examine for ourselves with an example. To get started, use the following script, wh…
In this article I will describe the Backup & Restore method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.

911 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

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now