JDBC Prepared Statements and ArrayList
Prepared Statements in JDBC are used for the compilation of SQL queries, enhancing performance by reducing overhead. Parameters that are used in Prepared Statements are represented by placeholders, which are denoted by ‘?’ in the String of SQL query. When ArrayLists are used as parameters, dynamic values can be passed to the SQL query without the need for explicit parameters.
To implement this:
- Construct the String of SQL query with placeholders (‘?’) corresponding to the number of elements present in the ArrayList.
- Iterate over the ArrayList to set parameters in the Prepared Statement using appropriate setter methods.
- Execute the query and process the ResultSet to obtain the desired output.
How to use an ArrayList as a Prepared Statement Parameter?
ArrayList is part of the Java Collection Framework and In this article, we will learn how to use an ArrayList as a prepared statement parameter.
Prepared Statement
It is a subinterface of the Statement interface. It is used to execute SQL parameterized queries and enhance performance and security. Here is an example of SQL parameterized queries.
String s="insert into emp values(?,?,?)";
In the above example, we are passing the parameter ‘?’ for the values. Their values are set when we call the setter method of the PreparedStatement.