SQLServer中的N是什么意思?
USE master; GO SELECT OBJECT_ID( N 'AdventureWorks.Production.WorkOrder') AS 'Object ID'; GO 红色的 N 是 什么 意思? 加上 N 代表存入数据库时以 Unicode 格式存储。 N 'string' 表示string是个Unicode字符串 Unicode 字符串的格式与普通字符串相似,
USE master;
GO
SELECT OBJECT_ID(N
'AdventureWorks.Production.WorkOrder') AS 'Object ID';
GO
红色的N 是什么 意思?
加上 N
代表存入数据库时以 Unicode 格式存储。
N
'string' 表示string是个Unicode字符串
Unicode 字符串的格式与普通字符串相似,但它前面有
一个 N
标识符(N
代表 SQL-92 标准中的国际语言 (National Language))。N
前缀必须是大写字母。例如,'Michél' 是字符串常量而 N
'Michél' 则是 Unicode 常量。Unicode 常量被解释为 Unicode 数据,并且不使用
代码页进行计算。Unicode 常量确实有
排序规则,主要用
于控制比较和区分大小写。为 Unicode 常量指派当前数据库的默认排序规则,除非使用
COLLATE 子句为其指定了排序规则。Unicode 数据中的每个字符都使用
两个字节进行存储,而字符数据中的每个字符则都使用
一个字节进行存储。有
关更多信息,请参见使用
Unicode 数据。
Unicode 字符串常量支持增强的排序规则。

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