Grant read write access sql query
For maximum security, issue the REVOKE in the same transaction that creates the object; then there is no window in which another user can use the object.
However, a similar effect can be obtained by granting or revoking membership in the role that owns the object; see below. When a non-owner of an object attempts to GRANT privileges on the object, the command will fail outright if the user has no privileges whatsoever on the object.
Note: for this purpose, "default privileges" always means the built-in default privileges for the object's type. If the role executing GRANT holds the required privileges indirectly via more than one role membership path, it is unspecified which containing role will be recorded as having done the grant.
How to give read and write permission in sql server 2008
The key word PUBLIC indicates that the privileges are to be granted to all roles, including those that might be created later. For sequences, this privilege allows the use of the nextval and setval functions. Without a grant option, the recipient cannot do that. This is comparable to the rights of root in a Unix system. The reason is that PostgreSQL treats the owner's privileges as having been granted by the owner to himself; therefore he can revoke them too. Step 2 - Once the databases list is ready, loop through these database to create a user for that login and grant it read and write access on each database. The owner could, however, choose to revoke some of his own privileges for safety. For schemas, allows new objects to be created within the schema. Note that revoking this privilege will not alter the placement of existing objects. Also, it enables the grantee to query the options of the server and associated user mappings. Database superusers can grant or revoke membership in any role to anyone. For sequences, this privilege allows the use of the currval and nextval functions. For servers, this privilege enables the grantee to create, alter, and drop his own user's user mappings associated with that server. For large objects, this privilege allows the object to be read. However, a similar effect can be obtained by granting or revoking membership in the role that owns the object; see below.
The SQL standard does not support setting the privileges on more than one object per command. For example, if table t1 is owned by role g1, of which role u1 is a member, then u1 can grant privileges on t1 to u2, but those privileges will appear to have been granted directly by g1.
It is therefore no longer necessary to use the keyword GROUP to identify whether a grantee is a user or a group.
It should be noted that database superusers can access all objects regardless of object privilege settings.
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