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2 に答える 2

20

To make it work, prefix the string with N

create table symboltable 
(
  val nvarchar(10)
)

insert into symboltable values(N'≥') 

select *
from symboltable

enter image description here

Further Reading:

于 2012-08-19T17:50:51.200 に答える
2

To add to gonzalo's answer, both the string literal and the field need to support unicode characters.

String Literal

Per Marc Gravell's answer on What does N' stands for in a SQL script ?:

'abcd' is a literal for a [var]char string, occupying 4 bytes memory, and using whatever code-page the SQL server is configured for.
N'abcd' is a literal for a n[var]char string, occupying 8 bytes of memory, and using UTF-16.

Where the N prefix stands for "National" Language in the SQL-92 standard and is used for representing unicode characters. For example, in the following code, any unicode characters in the basic string literal are first encoded into SQL Server's "code page":

<code>SELECT '≤&#39; AS ['≤&#39;], N'≤&#39; AS [N'≤&#39;]</code>

Aside: You can check your code page with the following SQL: 

SELECT DATABASEPROPERTYEX('dbName', 'Collation') AS dbCollation;
SELECT COLLATIONPROPERTY( 'SQL_Latin1_General_CP1_CI_AS' , 'CodePage' ) AS [CodePage];

The default is Windows-1252 which only contains these 256 characters

Field Type

Once the values are capable of being passed, they'll also need to be capable of being stored into a column that supports unicode types, for example:

  • nchar
  • nvarchar
  • ntext

Further Reading:

于 2018-08-15T00:35:18.537 に答える