多项选择题

oracle数据库中,如何快速做一个和原表表结构一样的空表?()

A.create table new_table as select *from old_table;
B.create table new_table as select *from old_table where 1=1;
C.create table new_table as select *from old_table where 1=2;
D.create table new_table as select *from old_table where rownum<1;

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