prepared-statement - w3toppers.com

Using setDate in PreparedStatement

❐ Using java.sql.Date If your table has a column of type DATE: java.lang.String The method java.sql.Date.valueOf(java.lang.String) received a string representing a date in the format yyyy-[m]m-[d]d. e.g.: ps.setDate(2, java.sql.Date.valueOf(“2013-09-04”)); java.util.Date Suppose you have a variable endDate of type java.util.Date, you make the conversion thus: ps.setDate(2, new java.sql.Date(endDate.getTime()); Current If you want to insert the current … Read more

Call to a member function bind_param() on a non-object [duplicate]

Well, one reason prepare() can fail is if the sql statement sent to it is not valid in the current DB. prepare() will then return false. Eg – if the table name is not correct or one or more field in the query does not exist.

PreparedStatement with list of parameters in a IN clause [duplicate]

What I do is to add a “?” for each possible value. var stmt = String.format(“select * from test where field in (%s)”, values.stream() .map(v -> “?”) .collect(Collectors.joining(“, “))); Alternative using StringBuilder (which was the original answer 10+ years ago) List values = … StringBuilder builder = new StringBuilder(); for( int i = 0 ; … Read more

How do I use prepared statements in SQlite in Android?

For prepared SQLite statements in Android there is SQLiteStatement. Prepared statements help you speed up performance (especially for statements that need to be executed multiple times) and also help avoid against injection attacks. See this article for a general discussion on prepared statements. SQLiteStatement is meant to be used with SQL statements that do not … Read more

When should I use prepared statements?

tl/dr Always. 100% of the time, use it. Always; and even if you don’t need to use it. USE IT STILL. mysql_* functions are deprecated. (Notice the big red box?) Warning This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See … Read more

Use an array in a mysqli prepared statement: `WHERE .. IN(..)` query [duplicate]

you could do it this way: $ids = array(1,5,18,25); // creates a string containing ?,?,? $clause = implode(‘,’, array_fill(0, count($ids), ‘?’)); $stmt = $mysqli->prepare(‘SELECT * FROM somewhere WHERE `id` IN (‘ . $clause . ‘) ORDER BY `name`;’); call_user_func_array(array($stmt, ‘bind_param’), $ids); $stmt->execute(); // loop through results Using this you’re calling bind_param for each id and … Read more

PHP – Using PDO with IN clause array

PDO is not good with such things. You need to create a string with placeholders dynamically and insert it into the query, while binding array values the usual way. With positional placeholders it would be like this: $in = str_repeat(‘?,’, count($in_array) – 1) . ‘?’; $sql = “SELECT * FROM my_table WHERE my_value IN ($in)”; … Read more

How can prepared statements protect from SQL injection attacks?

The idea is very simple – the query and the data are sent to the database server separately. That’s all. The root of the SQL injection problem is in the mixing of the code and the data. In fact, our SQL query is a legitimate program. And we are creating such a program dynamically, adding … Read more

PreparedStatement IN clause alternatives?

Can I bind an array to an IN() condition in a PDO query?

You’ll have to construct the query-string. <?php $ids = array(1, 2, 3, 7, 8, 9); $inQuery = implode(‘,’, array_fill(0, count($ids), ‘?’)); $db = new PDO(…); $stmt = $db->prepare( ‘SELECT * FROM table WHERE id IN(‘ . $inQuery . ‘)’ ); // bindvalue is 1-indexed, so $k+1 foreach ($ids as $k => $id) $stmt->bindValue(($k+1), $id); $stmt->execute(); … Read more