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Amedrano
Posts: 80
Posted 13:17 Nov 08, 2015 |
<SelectList> := <Field> [ , <SelectList> ]

I don't really understand this notation is it recursive?

Can anyone describe it for me thanks.

Also, from ppt.

select * from students;

  - * is not an idTok, it’s a single char token

<Field>

:= IdTok

what is considered an "iDTok"?

Last edited by Amedrano at 13:21 Nov 08, 2015.
cysun
Posts: 2935
Posted 13:53 Nov 08, 2015 |

1. Yes, it's recursive.

2. IdTok is "identifier token". Table and column names are "identifiers".