Statements are useful for sending SQL commands to the database and receiving data from the database. There are three types of statements in JDBC. They are :
Statement : It is the factory for ResultSet. It is used for general-purpose access to the database by executing the static SQL query at runtime.
Statement st = conn.createStatement( );
ResultSet rs = st.executeQuery();
PreparedStatement : It is used when we need to give input data to the query at runtime and also if we want to execute SQL statements repeatedly. It is more efficient than a statement because it involves the pre-compilation of SQL.
String SQL = "Update item SET limit = ? WHERE itemType = ?";
PreparedStatement ps = conn.prepareStatement(SQL);
ResultSet rs = ps.executeQuery();
CallableStatement : It is used to call stored procedures on the database. It is capable of accepting runtime parameters.
CallableStatement cs = con.prepareCall("{call SHOW_CUSTOMERS}");
ResultSet rs = cs.executeQuery();
