参考答案: A
详细解析:
alter table user drop if exists partition(region='hangzhou',dt='20180923');
A. alter table tb1 drop partition (p1='1');
B. delete from table tb1;
C. insert into table tb1 select * from tb1 where 1=2;
D. truncate table tb1;
参考答案: A
详细解析:
alter table user drop if exists partition(region='hangzhou',dt='20180923');