I want to use quotation with escape character. How can I do?
I have received error in SQL Server
Unclosed quotation mark after the character string.
I'm writing SQL query in a varchar variable but I have received that error:
Unclosed quotation mark after the character string.
I want to use quotation mark as an escape char.
This question is related to
sql-server
escaping
char
To escape ' you simly need to put another before: ''
As the second answer shows it's possible to escape single quote like this:
select 'it''s escaped'
result will be
it's escaped
If you're concatenating SQL into a VARCHAR to execute (i.e. dynamic SQL), then I'd recommend parameterising the SQL. This has the benefit of helping guard against SQL injection plus means you don't have to worry about escaping quotes like this (which you do by doubling up the quotes).
e.g. instead of doing
DECLARE @SQL NVARCHAR(1000)
SET @SQL = 'SELECT * FROM MyTable WHERE Field1 = ''AAA'''
EXECUTE(@SQL)
try this:
DECLARE @SQL NVARCHAR(1000)
SET @SQL = 'SELECT * FROM MyTable WHERE Field1 = @Field1'
EXECUTE sp_executesql @SQL, N'@Field1 VARCHAR(10)', 'AAA'
You can escape quotation like this:
select 'it''s escaped'
result will be
it's escaped
You need to just replace ' with '' inside your string
SELECT colA, colB, colC
FROM tableD
WHERE colA = 'John''s Mobile'
You can also use REPLACE(@name, '''', '''''') if generating the SQL dynamically
If you want to escape inside a like statement then you need to use the ESCAPE syntax
It's also worth mentioning that you're leaving yourself open to SQL injection attacks if you don't consider it. More info at Google or: http://it.toolbox.com/wiki/index.php/How_do_I_escape_single_quotes_in_SQL_queries%3F
If you want to escape user input in a variable you can do like below within SQL
Set @userinput = replace(@userinput,'''','''''')
The @userinput will be now escaped with an extra single quote for every occurance of a quote
WHERE username LIKE '%[_]d'; -- @Lasse solution
WHERE username LIKE '%$_d' ESCAPE '$';
WHERE username LIKE '%^_d' ESCAPE '^';
Escaping quotes in MSSQL is done by a double quote, so a '' or a "" will produce one escaped ' and ", respectively.
You can define your escape character, but you can only use it with a LIKE clause.
Example:
SELECT columns FROM table
WHERE column LIKE '%\%%' ESCAPE '\'
Here it will search for % in whole string and this is how one can use ESCAPE identifier in SQL Server.
You could use the **\** character before the value you want to escape e.g
insert into msglog(recipient) values('Mr. O\'riely')
select * from msglog where recipient = 'Mr. O\'riely'
To keep the code easy to read, you can use square brackets [] to quote the string containing ' or vice versa .
Source: Stackoverflow.com