Why use “where 1=2” on a SQL CREATE TABLE syntax?

Question

CREATE TABLE EMPL_DEMO AS SELECT * FROM employees WHERE 1=2;

I have seen this statement someplace on the internet but I couldn't understand the WHERE 1=2.

Can anyone please, explain this? 

Answer 1

This type of command is normally used to copy the structure of one table to the another. In this case, EMPL_DEMO will be having the same column structure of employees, except for the keys or constraints.

The 1=2 always evaluates to False which stops you from copying any of the rows.

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