prepared-statement

Next to the addBatch() method of PreparedStatement there is also an addBatch(String) method in the Statement class. I want to process a series of different sql statements and am looking for some clarification on what addBatch(String) means performance-wise. Is it safe (and fast) to use this method or is it better to group similar sql-statements in Java and execute them in groups? Batch Processing allows you to group related SQL statements into a batch and submit them with one call to the database. When you send several SQL statements to the database at once, you reduce the amount of

I saw this example somewhere: rs = connection.prepareStatement("select * from table").executeQuery(); Could I use this format, if I want to execute a query like this " Select * from table where column = "hello" "? The way in which I usual I use prepareStatement object is something like this: String sql = "select * from adresa where column = ?"; PreparedStatement pre = con.prepareStatement(sql); pre.setString(1, i); rs = pre.executeQuery(); Later Edit: I don't understand. Pascal Thivent wrote that I can use the short version with In parameters, but Liu tells me this is not possible. :) Anw,

Let's say I have a prepared statement that looks like this: $insertSql = ""; $insertSql .= "INSERT INTO table"; $insertSql .= "(tag,month_interval,month_interval_lastupdated,date_due,date_due_lastupdated,date_completion,date_completion_lastupdated,"; $insertSql .= "activeNotification,date_lastmodified) "; $insertSql .= "VALUES (?,?,NOW(),?,NOW(),?,NOW(),?,NOW())"; But sometimes some of those question marks would not be set. Is there a keyword I can substitute in the prepared statement that tells MySQL to insert the default? Something like: if($stmt = $mysqli->prepare($insertSql)) { if(!isset(

This returns true but it didn't truncate the table: $this->db->query("TRUNCATE TABLE $tablename"); But it works before creating a database connection object for prepared statement. How to fix it? Also, I want to know how to truncate the table using prepared statement. NO, A prepared statement would not be a solution because it is not possible to bind the table name. So avoid to use prepared statement for Truncate Table. You cannot bind any SQL litera l but data one. So keywords, operators and any identifier can not be bind using prepared statement. You can only bind data. PDO prepared

I am using PreparedStatement to query my table. Unfortunately, I have not been able to do so. My code is as simple as this: PreparedStatement preparedStatement = connection.prepareStatement( "Select favoritefood from favoritefoods where catname = ?"); preparedStatement.setString(1, "Cappuccino"); ResultSet resultSet = preparedStatement.executeQuery(); The error thrown is java.sql.SQLException: ORA-00911: invalid character . As if it never run through the parameter given. Thanks for your time. I've spend a day to debug this yet still unsuccessful. As mention by Piyush, if I omit the semicolon

I am trying to create a prepared statement in using the Golang sqlx library. I want to have the table name be a bindVar stmt, err := stmtTx.Preparex("SELECT * FROM $1 WHERE question_id=$2;") However this gives me an syntax error around /$1/ . Can I not use a bind var for the table name? Can I not use a bind var for the table name? No, source of quote. The arguments can only be used as data values, not as identifiers. Thus for example this is reasonable: INSERT INTO mytable VALUES ($1); but this will not work: INSERT INTO $1 VALUES (42); But you can use fmt.Sprintf for the table name if you

I have a query that looks like this: SELECT last_name, first_name, middle_initial FROM names WHERE last_name IN ('smith', 'jones', 'brown') I need to be able to parameterize the list in the IN clause to write it as a JDBC PreparedStatement. This list could contain any number of names in it. Is the correct way to do this: SELECT last_name, first_name, middle_initial FROM names WHERE last_name IN (?) and then build a list of parameters? Or is there a better (more correct) way to do that? Andrew White In short, you can't out of the box. However, with Spring you can do what you want. See How to

I have this function in my CMS, which inserts a variable list of fields and values into two different tables; one is a static index table and one is dynamic. This is the function: function insertFields($fields) { $stdfields = array(); $extfields = array(); /* Separate the fields based on if the fields is standard or extra. $this->fields is a csv list of the defined extra fields */ foreach($fields as $field => $value) { $fields[mysql_real_escape_string($field)] = mysql_real_escape_string($value); if(strstr($this->fields, $field)) $extfields[$field] = $value; else $stdfields[$field] = $value; }