sql - 查询中的单引号

Question

如何在查询中插入单引号？

例子

select *, 'INSERT INTO San_Endereco (Endereco_Id, Logradouro_Id, Bairro_Id, CEP, Logradouro, Livre) VALUES 
(' + CAST(Endereco_Id as varchar) + ','
+ CAST(Logradouro_Id as varchar) + ','
+ CAST(Bairro_Id as varchar) + ','
+ CAST (CEP as varchar) + ','
+ CAST(Logradouro as varchar) + ','
+ CAST(Livre as varchar) + ')'  as teste
FROM San_Endereco

在每个CAST我需要放单引号之前。我怎样才能做到这一点 ？

Answer 1

使用两个单引号：''

select *, 'INSERT INTO San_Endereco (Endereco_Id, Logradouro_Id, Bairro_Id, CEP, Logradouro, Livre) VALUES  
(''' + CAST(Endereco_Id as varchar) + ''',''' 
+ CAST(Logradouro_Id as varchar) + ''',''' 
+ CAST(Bairro_Id as varchar) + ''',''' 
+ CAST (CEP as varchar) + ''',''' 
+ CAST(Logradouro as varchar) + ''',''' 
+ CAST(Livre as varchar) + ''')'''  as teste 
FROM San_Endereco 

Answer 2

使用双单引号''

如果要插入的实际数据中包含单引号，则命令通常会损坏。要解决此问题，只需将任何单引号替换为两个引号（不是双引号字符而是两个单引号字符）。

Answer 3

declare @var varchar(100)
select @var = 'txt'        
select char(39)+@var+char(39) -- with single quote

Answer 4

select *, 'INSERT INTO San_Endereco (Endereco_Id, Logradouro_Id, Bairro_Id, CEP, Logradouro, Livre) VALUES 
        (''' + CAST(Endereco_Id as varchar) + ''','
    + ....

Answer 5

您必须'在字符串中使用两次：

declare @var varchar(100)
select @var = 'txt'        
select ' '+@var+' ' -- without single quote
select ''''+@var+'''' -- with single quote