Escape Character in SQL Server

Question

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

User · Answer

WHERE username LIKE      d              --  Lasse solution WHERE username LIKE     d  ESCAPE      WHERE username LIKE     d  ESCAPE       FROM  SQL Server Escape an Underscore

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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

User · Answer

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

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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

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You can escape quotation like this   select  it  s escaped    result will be  it s escaped

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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

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To keep the code easy to read  you can use square brackets    to quote the string containing   or vice versa

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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

User · Answer

Escaping quotes in MSSQL is done by a double quote  so a    or a    will produce one escaped   and    respectively

[sql-server] Escape Character in SQL Server

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