Understanding Oracle aliasing - why isn't an alias not recognized in a query unless wrapped in a second query?

Question

I have a query

SELECT COUNT(*) AS \"CNT\",
       imei
FROM   devices  

which executes just fine. I want to further restrict the query wi

Answer 1

I would imagine because the alias is not assigned to the result column until after the WHERE clause has been processed and the data generated. Is Oracle different from other DBMSs in this behaviour?