问题描述
请查看此 SQL 代码:
Please see this SQL code:
DECLARE @MyQuery nvarchar(max) set @MyQuery = 'SELECT TOP 1 @TranslatedMessageOutput = ' + @LanguageName + ' FROM local_translation WHERE English = '+CHAR(39)+CHAR(39)+Convert(nvarchar(50), (select English from inserted)) +CHAR(39)+CHAR(39)+CHAR(39)+ ' AND [' + @LanguageDateName + '] NOT LIKE ''%1900%'''
如果我为英语输入 abc 这个查询就可以正常工作了.
If I type abc for English this query works just fine.
但是如果我输入 'abc' 为英语查询会抛出一个错误:
But if I type 'abc' for English the query is throwing an error:
字符串"后的非封闭引号.."附近的语法不正确
Unclosed quotation mark after the character string "". Incorrect syntax near "."
我该如何解决这个问题?
How do I solve this?
推荐答案
我怀疑您需要转义此查询的输出:
I suspect you will need to escape the output of this query:
(select English from inserted)
如在
(select replace(English, '''', '''''') from inserted)
在将结果连接到您的动态 SQL 语句之前,上述内容将用 '' 替换 '.但是对于任何动态 SQL,我强烈建议您使用绑定值来防止此类 SQL 语法错误和 SQL 注入!IE.你应该能够写出这样的东西:
The above will replace ' by '' before concatenating the outcome to your dynamic SQL statement. But with any dynamic SQL, I strongly suggest you make use of bind values to prevent such SQL syntax errors and SQL injection! I.e. you should be able to write something like this:
declare @English; select @English = English from inserted; set @MyQuery = 'SELECT TOP 1 @TranslatedMessageOutput = ' + @LanguageName + ' FROM local_translation WHERE English = @English' ' AND [' + @LanguageDateName + '] NOT LIKE ''%1900%'''; -- ...