Statement 和 PreparedStatement 的区别

一、声明：
它用于访问您的数据库。 Statement 接口不能接受参数，当您在运行时使用静态 SQL 语句时很有用。如果您只想运行 SQL 查询一次，则该接口优于 PreparedStatement。

例子 –

//Creating The Statement Object  
Statement GFG = con.createStatement();
  
//Executing The Statement  
GFG.executeUpdate("CREATE TABLE STUDENT(ID NUMBER NOT NULL, NAME VARCHAR)"); 

2. 准备语句：
当您要多次使用 SQL 语句时使用它。 PreparedStatement 接口在运行时接受输入参数。

例子 –

//Creating the PreparedStatement object 
PreparedStatement GFG = con.prepareStatement("update STUDENT set NAME = ? where ID = ?");
  
//Setting values to place holders  
//Assigns "RAM" to first place holder
GFG.setString(1, "RAM");   
          
//Assigns "512" to second place holder
GFG.setInt(2, 512);     
 
//Executing PreparedStatement
GFG.executeUpdate(); 

CallableStatement 和 PreparedStatement 的区别：

Statement	PreparedStatement
It is used when SQL query is to be executed only once.	It is used when SQL query is to be executed multiple times.
You can not pass parameters at runtime.	You can pass parameters at runtime.
Used for CREATE, ALTER, DROP statements.	Used for the queries which are to be executed multiple times.
Performance is very low.	Performance is better than Statement.
It is base interface.	It extends statement interface.
Used to execute normal SQL queries.	Used to execute dynamic SQL queries.
We can not used statement for reading binary data.	We can used Preparedstatement for reading binary data.
It is used for DDL statements.	It is used for any SQL Query.
We can not used statement for writing binary data.	We can used Preparedstatement for writing binary data.
No binary protocol is used for communication.	Binary protocol is used for communication.