Can comments be started in the first line before a query in oracle sql : As in i just want to execute a query with a comment:
Ex: 
/*Selects all columns and rows*/
SELECT * FROM "SNAPLOGIC"."CUSTCOMM1"
or
-- comment
select * from "SNAPLOGIC"."CUSTCOMM1"
Can we execute in oracle sql?

Note: These statement can be executed in tools like dbeaver etc.,