![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
对于图书管理数据库,检索当前至少借阅了2本图书的读者的姓名和所在单位。下面SQL语句正确的是______。SELECT姓名,单位FROM读者WHERE借书证号IN______
A.(SELECT借书证号FROM借阅GROUPBY总编号HAVINGCOUNT(*)>=2)
B.(SELECT借书证号FROM读者GROUPBY借书证号HAVINGCOUNT(*)>=2)
C.(SELECT借书证号FROM借阅GROUPBY借书证号HAVINGSUM(*)>=2)
D.(SELECT借书证号FROM借阅GROUPBY借书证号HAVINGCOUNT(*)>=2)
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)