The **statement** and **prepared statement** interfaces in Java enable us to use SQL commands to send and retrieve data.

* **Statement** is used to call normal SQL queries.

* **Prepared statement** is used to call parametrized or dynamic SQL queries.

```Java
Statement stm = conn.createStatement()
```

``` Java
PreparedStatement stm = conn.prepareStatement( String Obj )
```

* In this interface, only SQL queries without parameters can be passed.

* In this interface, parameters can be passed at a run time.

* This interface is preferred when a SQL command needs to be executed once. It is primarily​ used for DDL statements like CREATE, ALTER, etc.

* This interface is preferred for SQL commands that need to be executed multiple times. 

* The performance of this interface is a bit low.

* This interface performs​ far better than the normal statement.

Statement vs. prepared statement in Java

Statement is used for single execution of simple SQL queries; PreparedStatement is optimized for repeated parametrized queries.