Using "like" wildcard in prepared statement
another word for using something
using someone synonym
useing or using
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I am using prepared statements to execute mysql database queries. And I want to implement a search functionality based on a keyword of sorts.
For that I need to use
LIKE keyword, that much I know. And I have also used prepared statements before, but I do not know how to use it with
LIKE because from the following code where would I add the
Can I directly use it in the
pstmt.setString(1, notes) as
(1, notes+"%") or something like that. I see a lot of posts on this on the web but no good answer anywhere.
PreparedStatement pstmt = con.prepareStatement( "SELECT * FROM analysis WHERE notes like ?"); pstmt.setString(1, notes); ResultSet rs = pstmt.executeQuery();
You need to set it in the value itself, not in the prepared statement SQL string.
So, this should do for a prefix-match:
notes = notes .replace("!", "!!") .replace("%", "!%") .replace("_", "!_") .replace("[", "!["); PreparedStatement pstmt = con.prepareStatement( "SELECT * FROM analysis WHERE notes LIKE ? ESCAPE '!'"); pstmt.setString(1, notes + "%");
or a suffix-match:
pstmt.setString(1, "%" + notes);
or a global match:
pstmt.setString(1, "%" + notes + "%");
Using Synonyms, Using Antonyms, synonyms: utilize, make use of, avail oneself of, employ, work, operate, wield, ply, apply, maneuver, manipulate, put to use, put into service, find a use for, resort to, exercise, exert, bring into play, practice, implement, draw on Define using. using synonyms, using pronunciation, using translation, English dictionary definition of using. v. used , us·ing , us·es v. tr. 1. To put into service
Code it like this:
PreparedStatement pstmt = con.prepareStatement( "SELECT * FROM analysis WHERE notes like ?"); pstmt.setString(1, notes + "%");`
Make sure that you DO NOT include the quotes ' ' like below as they will cause an exception.
pstmt.setString(1,"'%"+ notes + "%'");
Using Synonyms, Using Antonyms, describing an action or state of affairs that was done repeatedly or existed for a period in the past. Using: to put into action or service. Synonyms: applying, employing, exercising… Find the right word. SINCE 1828. GAMES; BROWSE THESAURUS; WORD OF THE DAY; WORDS AT
PreparedStatement ps = cn.prepareStatement("Select * from Users where User_FirstName LIKE ?"); ps.setString(1, name + '%');
Try this out.
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String fname = "Sam\u0025"; PreparedStatement ps= conn.prepareStatement("SELECT * FROM Users WHERE User_FirstName LIKE ? "); ps.setString(1, fname);
USE (verb) definition and synonyms, Using definition, to employ for some purpose; put into service; make use of: to use a knife. See more. use, employ, utilize mean to put into service especially to attain an end. use implies availing oneself of something as a means or instrument to an end. willing to use any means to achieve her ends employ suggests the use of a person or thing that is available but idle, inactive, or disengaged.
we can simplly do this, by using the CONCATE SQL function.
PreparedStatement pstmt = con.prepareStatement( "SELECT * FROM analysis WHERE notes like CONCAT( '%',?,'%')"; pstmt.setString(1, notes); ResultSet rs = pstmt.executeQuery();
this is work perfectly for my case.
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Use, c : a method or manner of employing or applying something gained practice in the use of the camera. 2a : the privilege or benefit of using something gave him The using statement ensures that Dispose is called even if an exception occurs within the using block. You can achieve the same result by putting the object inside a try block and then calling Dispose in a finally block; in fact, this is how the using statement is translated by the compiler. The code example earlier expands to the following
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- +1 The OP could "set" it in the SQL — as by
... LIKE '%' || ? || '%'or similar — but that's much less flexible.
- how do i do it with NON-CASE SENSITIVE mode? :)
- Non-case-sensitive can still use
WHERE UPPER(?) LIKE UPPER(?)when using
pstmt.setString(2, "%" + notes + "%")
- @Alain: Thank you. Just wondering, does this apply to all RDBMS the world is aware of? Perhaps
'%' || ? || '%'as mentioned in 1st comment was better, after all? I don't have the opportunity to experiment right now.
- @BalusC this applies to MSSQL, Postgres, and MySQL in my testing. The String being made into a parameter is itself interpreted as a mix of data and control instructions. SQL concatenation occurs before it is interpreted and preserves the vulnerability. The IEEE Center for Secure Design says to Strictly Separate Data and Control Instructions, and Never Process Control Instructions Received from Untrusted Sources.
- Though it sounds like someone won't run into this assumption, it's actually very valid especially when working with Oracle. Thanks for pointing out!
- Could you elaborate the answer rather than just giving the answer? See: stackoverflow.com/help/how-to-answer
- it is unsafe, kindly use parametrized preparedstatement.