下面关于GROUPBY的用法正确的是?多选()
A. select id, score from student group by id,score;
B. select id, sum(score) from student group by id;
C. select sum(score) from student group by id;
D. select id, score from student group by id;
GaussDB100用于实现AZ内高可用,提供秒级快速倒换的特性叫做?单选()
A. Quick Switch
B. Switch Smart
C. Flash Back
D. Switch Turbo
下面哪种别名用法是正确的?多选()
A. select staff_id id from staffs;
B. select staff _id as id from staffs;
C. select staffl_id id from staffs;
D. select staff_id id from staffs;
GaussDB200支持列存、向量化执行技术,可以支挥PB级数据的深度分析与挖掘。单选()
A. TRUE
B. FALSE