以下程序代码对Customer的name属性修改了两次：
tx = session.beginTransaction();
Customer customer=(Customer)session.load(Customer.class,
new Long(1));
customer.setName("Jack");
customer.setName("Mike");
tx.commit();
执行以上程序，Hibernate需要向数据库提交几条update语句？
tx = session.beginTransaction();
Customer customer=(Customer)session.load(Customer.class,
new Long(1));
customer.setName("Jack");
customer.setName("Mike");
tx.commit();
执行以上程序，Hibernate需要向数据库提交几条update语句？
举一反三
- 下程序代码对 Stu 的 name 属性修改了两次 tx=session.beginTransaction(); Stu stu =(Stu)session.load(Stu.class,new Long(1)); Stu.setName(“Tom”)； Stu.setName(“Mike”) ； tx.commit(); 执行以上程序，Hibernate 需要向数据库提交几条 update 语句（ ） 。
- B2C是英文（ ）的缩写。 A: Business to Customer B: Business 2 Customer C: Customer to Customer D: Customer 2 Customer
- The costs of _______ are much lower than the costs of recruiting new customers. A: customer satisfaction B: customer loyalty C: customer value D: customer retention
- C2C Customer to Customer
- 假设需要更改表名“CUSTOMER”为“CUSTOMER_CHANGE”，可以使用（）语句。 A: AALTER TABLE CUSTOMER RENAME CUSTOMER_CHANGE B: BALTER TABLE CUSTOMER RENAME TO CUSTOMER_CHANGE C: CRENAME TABLE CUSTOMER TO CUSTOMER_CHANGE D: DRENAME TABLE CUSTOMER CUSTOMER_CHANGE