问题
单项选择题
The most commonly used locking level in implementing concurrency control is at which of the following levels
A．database
B．table
C．record
D．field
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
The most commonly used locking level in implementing concurrency control is at which of the following levels
A．database
B．table
C．record
D．field
参考答案：C