1. Difference between JDBC Statement and PreparedStatement coderanch.com |
2. Statement vs PreparedStatement coderanch.comThere are a number of reasons why a plain Statement still has uses. One of them is so we can separate the professional programmers from the amateurs by giving them a way to set up for SQL injection attacks. Seriously, the more you can reuse a PreparedStatement, the more efficient it can be (relatively speaking). However, they can also be more ... |
3. PreparedStatement return empty resultset, but statement returns row values coderanch.comString sql = "select b.* from test1 a, test2 b where a.id='" + temp.get(0) + "' and b.id='" + temp.get(0) + "' and a.cd='" + temp.get(1) + "' and a.a_id=" + temp.get(2) + " and a.nb=" + temp.get(3) + " and a.ab_id=" + temp.get(4) + " and a.am=" + temp.get(5); ResultSet rs = stmt.executeQuery(sql) |
4. ResultSet not updateable Exception when using RowSet coderanch.comI'm usinging RowSet to update an mySQL table and i'm getting a ResultSet is not updateable Exception at line 60(were I use the updateString() method in the doPost() method). From my understanding RowSet is updateable by default and I even call the isReadOnly() method to check this, which returns true! But even after setting readOnly to false I still get the ... |
5. ResultSet & PreparedStatement dbforums.comHai, Is it possible to determine if the resultset associated with a PreparedStatement is closed or not ?? I have a java application in which ConnectionPooling and PreparedStatementPooling is done... A thread can request for a prepared statement from the pool and once it finishes its task, it returns the PS to the pool.The problem i have is if a thread ... |
6. code difference for PreparedStatement and Statement dbforums.comWe know preparedStatement in JDBC has performance benefit for frequently called queries because preparedStatement will be compiled and cached on the server. My question is do we need to avoid multiple calls to create a preparedStatement or it will not matter because server can handle it by check the existing compiled result? For example, I have a addNewCustomer() method which will ... |
7. Prepared statements across different threads dbforums.comHi! Given: different java threads are accessing a database (DB2) and issuing almost the same SQL statements. Say, Thread 1: "select a from b where c=1,d=1,e=1;" and Thread 2: "select a from b where c=2;d=2;e=2;". The same for updating the table. Threads are using one static connection and different java.sql.Statement created for every SQL statement. Question: Appears an idea to combine ... |
8. Statement VS PreparedStatement dbforums.comIn the application I am working on, there is the need to speed up the insert of a variable (but large) number of rows to a table. The inserts are simple, and right now we are using ordinary Statement objects. We thought we can speed it up by using PreparedStatement or CallableStatement to stored procedure. Our tests show that using PreparedStatement ... |
9. Problem with resultSet.updateNString and rowSet.updateNString java-forums.orgThis is my code 1) I use resultSet to insert to database String sql = "Select * from Students"; preStm = cn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENS ITIVE,ResultSet.CONCUR_UPDATABLE); rSet = preStm.executeQuery(); rSet.first(); rSet.updateString(1, text_ID_insert.getText()); rSet.updateNString(2, text_name_insert.getText()); rSet.updateInt(3, Integer.parseInt(combo_class_insert.getSelectedIte m().toString())); rSet.updateNString(4, text_address_insert.getText()); rSet.updateString(5, text_tel_insert.getText()); rSet.insertRow(); 2) I use rowSet rowSet = new JdbcRowSetImpl(rSet); rowSet.moveToInsertRow(); rowSet.updateString(1, text_ID_insert.getText()); rowSet.updateNString(2, text_name_insert.getText()); rowSet.updateInt(3, Integer.parseInt(combo_class_insert.getSelectedIte m().toString())); rowSet.updateNString(4, text_address_insert.getText()); rowSet.updateString(5, text_tel_insert.getText()); rowSet.insertRow(); Both ... |
10. Statement or Prepared Statement ? java-forums.org |
11. Difference between JDBC Statement and PreparedStatement java-forums.orgThe difference is the PreparedStatement is a kind of Statement. PreparedStatement allows you to define parameters that you set, which allows you to reuse the Statement many times with "preparing" over and over. Note that all Statement require "preparation", and it takes a long time; it's noticeable even if you just watch in debug. PreparedStatment parameters also project you against SQL ... |
12. Prepared statements - how to set up? forums.oracle.comyou might also want to look at moving up to stored procedures when your queries get this long. There is a limit to the amount of SQL you can put in a single query (you're not quite there yet, probably, but you do stand a very real chance of running into it). |
13. why are Prepared statements efficient forums.oracle.comIn particular there's are situations where you can use batch updates, in which the SQL is sent and parsed only once and just the variable data is sent for further updates in the batch (though not all DBs and drivers support this). But most of use use PreparedStatements because it saves worrying about parameter setting, like dealing with the dreaded Mr ... |
14. Prepared Statements taking Arraylist as input forums.oracle.comYeah, sorry about that, I tried to edit that post before you read it, but I guess I wasn't quick enough :-\. It seems there isn't an easy answer. You can either dynamically insert the " IN (?,?,?)" depending on how many values you have, and then use setString on the specific parts, or you can use trickery within the query ... |
15. Difference between preparedstatement and statement... forums.oracle.comA JDBC driver is the interface between your program and the database. You use JDBC calls (using the classes and interfaces in the package java.sql) and the driver converts this to calls specific for the brand and type of database that you're using. The good thing about this is that if you use a different database, you only have to switch ... |
16. JDBC Prepared Statements forums.oracle.comSecurity considerations aside, the other posters are correct that you see performance benefits with PS from the database side, but not unless you repeat the statement many times. Back when I used to work with PS frequently, our rule of thumb was that you usually don't notice a performance improvement unless you call a PS at least 75-100 times. In our ... |