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From:Eli Hen Date:January 2 2004 9:39am
Subject:Re: Multiple Roles
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"Caroline Jen" <jiapei_jen@stripped> wrote in message
news:20040102092826.76215.qmail@ style="color:#666">stripped...
> In case that a user has multiple roles; for example,
> John Dole is both author and editor,
> 1. I should have two rows for John Dole?
>    John Dole     author
>    John Dole     editor
>    or. I should have only one row and use comma ',' to
>    separate the roles?
>    John Dole     author, editor
> 2. How do I create the table for the second case (see
> below)?
>   create table user_roles (
>   user_name     varchar(15) not null,
>   role_name     varchar(15) not null, varchar(15) null
>   );

for the second option, you can use VARCHAR for roles_names, only make sure
that you have enough space to define there all combinations of roles. you
can also use BLOB for it (VARCHAR is up to 255 chars length).

CREATE TABLE user_roles (
    user_name        VARCHAR(15) NOT NULL,
    roles_names      VARCHAR(31) NOT NULL

roles_names is of length 31 cuz the comma is also a char.

Multiple RolesCaroline Jen2 Jan
  • Re: Multiple RolesEli Hen2 Jan
  • Re: Multiple RolesMartijn Tonies2 Jan
  • Re: Multiple RolesTobias Asplund2 Jan
  • Re: Multiple RolesEd Leafe2 Jan
  • Re: Multiple RolesRoger Baklund2 Jan