December 2000
Intermediate to advanced
224 pages
9h 52m
English
Content preview from SQL in a Nutshell
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Name
CREATE ROLE
Synopsis
CREATE ROLE
allows the creation of a named set of privileges that may be assigned
to users of a database. When a user is granted a role, that user also
gets all the privileges and permissions of that role.
|
Vendor |
Command |
|---|---|
|
SQL Server |
Not supported |
|
MySQL |
Not supported |
|
Oracle |
Supported, with variations |
|
PostgreSQL |
Not supported |
Microsoft SQL Server does not support the CREATE
ROLE command, but has the equivalent capability via the
system stored procedure
sp_add_role
.
SQL99 Syntax and Description
CREATE ROLE role_name [WITH ADMIN {CURRENT_USER | CURRENT_ROLE}]This statement creates a new role, and differentiates that role from
a host-DBMS
user. The WITH ADMIN clause allows assigns a
role immediately to the currently active user or currently active
role. By default, the statement defaults to WITH ADMIN
CURRENT_USER.
Oracle Syntax and Variations
CREATE ROLE role_name [NOT IDENTIFIED | IDENTIFIED
{BY password | EXTERNALLY | GLOBALLY}]In Oracle, the role is created first, then granted privileges and
permissions as if it is a user via the GRANT
command. When users want to get access to the permissions of a role
protected by a password, they use the SET ROLE
command. If a password is placed on the role, any user wishing to
access it must provide the password with the SET
ROLE command.
Oracle ships with several preconfigured
roles.
CONNECT, DBA, and
RESOURCE are available in all versions of
Oracle. EXP_FULL_DATABASE and
IMP_FULL_DATABASE are newer roles used ...
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