Copy table structure and do not copy table data

Reference https://blog.csdn.net/jiankunking/article/details/17992727
 is generally used to select the table structure. The table structure refers to the name, type, and number of columns in the table .

Generally: 
CREATE TABLE B AS SELECT * FROM A WHERE 1<>1 
This will copy a table structure without copying the data. 
Because ORACLE has no boolean literal value, it cannot be written as WHERE FALSE, but can only be written as 1<>1, <> means not equal, of course you write 1=2, 2<>2,

2<1, 10000<3.1415 can represent "FALSE", that is, the condition is "false".