right to left in select

Why do I need parens in my select expression? I thought q is right to left

q)t:(a:10 20 30)

q)count select from t where a in 10 20,count 10

0

q)count select from t where a in (10 20,count 10)

2

q)(10 20,count 10)~10 20,count 10

1b

q).z.K

3.1

q).z.k

2013.06.18

, is first and foremost a separator in update/delete/exec/select

Cheers,

  Attila

http://code.kx.com/wiki/JB:QforMortals2/queries_q_sql#The_select_and_exec_Templates

Thank you very much. It was driving me nuts.