postgresql - Merge 3 tables in one table -

i have 3 tables (t1, t2, t3) in postgresql. have same number of columns (168 cols) same type , overall 300k rows.

how can add of them in 1 table?

insert t4 select * t1 union select * t2 union select * t3

or, if want create table during select:

select * t4 t1 union select * t2 union select * t3;

Sharma