Hierarchical queries. Value generation. How to use INSERT INTO.... query?

Question

Oracle

Hello.
Guys, tell me how to insert values ​​into a table in a loop ?

"Write" a simple loop for output - I figured it out. But for the insert - no way ..

SELECT rownum as rn FROM dual
CONNECT BY level <= 100;

Answer 1

INSERT INTO MYTAB(ID)
SELECT LEVEL FROM DUAL CONNECT BY LEVEL<=100;