Nowadays, it is hard for an ordinary family in Yangzhou to stay __ if they purchase a villa.

A．out of debt

B．out of place

C．out of reach

D．out of order

设有如下关系：学生(学号，姓名，性别，年龄，班号)其关键字是学号，将学号为10的学生姓名改为“王华”的SQL语句是______。