Overview
Spring JdbcTemplate is a powerful mechanism to connect to the database and execute SQL queries. It internally uses JDBC API but eliminates a lot of problems of JDBC API. It helps to avoid writing boilerplate code for such as creating the connection, statement, closing resultset, connection, etc..
With JdbcTemple, we generally do pass the parameter values with "?" (question mark). However, it is going to introduce the SQL injection problem. So, Spring provides another way to insert data by the named parameter. In that way, we use names instead of "?". So it is better to remember the data for the column. This can be done using NamedParameterJdbcTemplate.