Cannot Convert between Unicode and Non Unicode String Data Type

Hello,

In T-SQL script, if I change the following deliveryInstruction by DeliveryInstruction = ''

DeliveryInstruction = replace(replace(replace(replace(substring((select ', ' + ST_NoteText  from Test.DBO.StmNote where ST_Description = 'Import Delivery instructions' and ST_ParentID = JobShipment.JS_PK FOR XML PATH('')), 3, 1000),'
',''),ascii(13),''),ascii(10),''),'&','&'),
The following error is generated :

Cannot Convert between Unicode and Non Unicode String Data Type

Why?

Thanks

Regards
bibi92Asked:
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ste5anSenior DeveloperCommented:
Please post a concise and complete example. Include table DDL and sample data.

How should we help, when you post a fragment of a statement which is not testable?

The only thing I see, why do you use REPLACE()? Add the unicode string literal marker to all your string literals (N'it'sunicode').
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bibi92Author Commented:
Hello,

I search how to replace NTEXT column by NULL value.

Thanks

Regards
0
ste5anSenior DeveloperCommented:
???
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bibi92Author Commented:
Hello,

I try :

I have replaced DeliveryInstruction = '' by  DeliveryInstruction = CAST(N'' AS NVARCHAR(MAX)) ,


Thanks
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Anthony PerkinsCommented:
We are all anxiously waiting for you to tell us what is the question?  I do realize that English may not be your first language, so just a simple query showing the wrong output and the expected output would suffice.
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bibi92Author Commented:
Ok, I will do it for the next question. I have replaced

DeliveryInstruction = ''
by  
DeliveryInstruction = CAST(N'' AS NVARCHAR(MAX))

and the error Cannot Convert between Unicode and Non Unicode String Data Type is resolved.
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bibi92Author Commented:
This help to find a solution
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