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Old September 8th, 2005, 06:46 AM
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Default Syntax Query

The code below is taken from the sp_executesql page in sql books online.

On the last but one line there is an 'N' before the literal.

Anyone know what it means?

/* Show not having access to variables from the calling batch. */
DECLARE @CharVariable CHAR(3)
SET @CharVariable = 'abc'
/* sp_executesql fails because @CharVariable has gone out of scope. */
sp_executesql N'PRINT @CharVariable'
Old September 8th, 2005, 08:06 AM
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The 'N' is a qualifier signifying a UNICODE string. Thus, the expression:
N'PRINT @CharVariable'
indicates that the string enclosed in quotes should be encoded as a UNICODE string, rather than the default encoding on the server it is running on. This guarantees that the string and the '@' especially, will be correctly interpreted even if the code is run on a server configured in Sanskrit, for example.

Not necessary if you're running the Latin character sets, but documentation writers can't guarantee that...

Jeff Mason
Custom Apps, Inc.
Old September 8th, 2005, 08:37 AM
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Thanks that makes it clear.

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