如何在SQL中的单行上声明和分配变量

Question

我想要类似的东西

DECLARE myVariable nvarchar[MAX] = "hello world".

如果您告诉我如何在字符串中编码引号,则可以获得奖励积分.

例如:

我想要读取字符串

John said to Emily "Hey there Emily"

我的尝试是

DECLARE myVariable nvarchar[MAX] = "John said to Emily \"Hey there Emily\""

Answer 1

开始:

DECLARE @var nvarchar(max) = 'Man''s best friend';

你会注意到它'是通过加倍来逃脱的''.

由于字符串分隔符是'和否",因此无需转义":

DECLARE @var nvarchar(max) = '"My Name is Luca" is a great song';

MSDN页面中的第二个示例DECLARE显示了正确的语法.

Answer 2

在sql 2008上这是有效的

DECLARE @myVariable nvarchar(Max) = 'John said to Emily "Hey there Emily"'
select @myVariable

在sql server 2005上,你需要这样做

DECLARE @myVariable nvarchar(Max) 
select @myVariable = 'John said to Emily "Hey there Emily"'
select @myVariable

Answer 3

你几乎明白了：

DECLARE @myVariable nvarchar(max) = 'hello world';

有关文档，请参见此处

对于引号，SQL Server 使用撇号，而不是引号：

DECLARE @myVariable nvarchar(max) = 'John said to Emily "Hey there Emily"';

如果需要在字符串中使用双撇号：

DECLARE @myVariable nvarchar(max) = 'John said to Emily ''Hey there Emily''';